Having Defined Porosity Either Functional Or By Size (i.e., Semipermeable, Permselective, Ionpermeable, Microporous, Etc.) Patents (Class 429/145)
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Patent number: 8722231Abstract: A separator for an energy storage cell having a microporous matrix including a reversible porosity-controlling agent. The porosity-controlling agent is selected from the group consisting of agents that change size as a function of temperature, agents that change size as a function of electrolyte concentration, and agents that change size as a function of temperature and electrolyte concentration to provide a change in an overall porosity of the separator.Type: GrantFiled: November 12, 2007Date of Patent: May 13, 2014Assignee: MP Assets CorporationInventors: George H. Brilmyer, Robert A. Wimberly
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Patent number: 8715849Abstract: The invention relates to a microporous membrane which comprises polyethylene, the microporous membrane having a differential pore volume curve with an area under the curve over the range of pore diameters of from about 100 nm to about 1,000 nm that is 25% or more of a total area under the curve over the range of pore diameters of from about 10 nm to about 1,000 nm.Type: GrantFiled: October 5, 2007Date of Patent: May 6, 2014Assignee: Toray Battery Separator Film Co., Ltd.Inventors: Kotaro Takita, Shintaro Kikuchi
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Publication number: 20140120403Abstract: A battery separator and a method for preparing the same are provided. The battery separator comprises: a substrate which is a polyvinylidene fluoride non-woven fabric; and a coating layer formed on each surface of the substrate, in which the material of the coating layer comprises an ultra-high molecular weight polyethylene and a linear low density polyethylene.Type: ApplicationFiled: June 6, 2012Publication date: May 1, 2014Applicants: BYD Company Limited, Shenzhen BTD Auto R&D Company LimitedInventors: Miaoyun Lin, Zhen You, Weicheng Yu, Mingjun Luo, Huiquan Liu
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Publication number: 20140113175Abstract: A lithium ion battery containing conducting materials comprises a positive electrode, a negative electrode, a separator, an electrolyte, adhesives and sealing materials. The conducting materials in the positive electrode comprise metal carbides, metal borides or metal nitrides. The conducting materials in the negative electrode comprise metal carbides, metal borides or metal nitrides. The metal carbide is titanium carbonitride, tungsten carbide or titanium carbide, vanadium carbide, tantalum carbide, and eutectic of tungsten carbide and titanium carbide. The metal boride is molybdenum boride, tungsten boride or vanadium boride. The metal nitride is titanium nitride, tungsten nitride or tantalum nitride. The conducting materials in the positive electrode may also comprise powdered metals. The conducting materials in the negative electrode comprise powdered metals. The powdered metal is nickel powder, copper powder or chromium powder.Type: ApplicationFiled: June 2, 2011Publication date: April 24, 2014Inventor: Panyi ZHANG
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Publication number: 20140113176Abstract: A separator (1) having heat resistant insulation layers for an electric device includes a resin porous substrate (2), and heat resistant insulation layers (3) formed on both surfaces of the resin porous substrate (2) and containing heat resistant particles having a melting point or a thermal softening point of 150° C. or higher. A parameter X represented by the following mathematical formula 1 is greater than or equal to 0.15: X = ( A ? + A ? ) C × ( A ? / A ? ) 2 [ Math ? ? 1 ] where A? and A? represent thicknesses (?m) of the respective heat resistant insulation layers (3) formed on both surfaces of the resin porous substrate (2) while fulfilling a condition of A??A?, and C represents the entire thickness (?m) of the separator (1) having heat resistant insulation layers.Type: ApplicationFiled: June 13, 2012Publication date: April 24, 2014Inventors: Hironobu Muramatsu, Tamaki Hirai, Kazuki Miyatake
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Patent number: 8703323Abstract: Disclosed is a separator. The separator includes a planar non-woven fabric substrate having a plurality of pores, and a porous coating layer formed on at least one surface of the non-woven fabric substrate. The porous coating layer is composed of a mixture of filler particles and a binder polymer. The filler particles include conductive positive temperature coefficient (PTC) particles composed of a mixture of conductive particles and a low melting point resin having a melting point lower than that of the non-woven fabric substrate. Due to the presence of the conductive PTC particles, the porous coating layer can be imparted with a shutdown function against thermal runaway. In addition, the porous coating layer exhibits appropriate electrical conductivity. Therefore, the separator is suitable for use in a high-capacity electrochemical device.Type: GrantFiled: June 30, 2011Date of Patent: April 22, 2014Assignee: LG Chem, Ltd.Inventors: Pil-Kyu Park, Jong-Hun Kim, Soon-Ho Ahn, Je-Young Kim
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Patent number: 8669002Abstract: To provide a thermoplastic resin microporous film being difficult in longitudinal tearing and excellent in tear resistance; a microporous film comprising a thermoplastic resin, wherein a melt flow rate of the thermoplastic resin in the microporous film is in the range of 0.1 to 2.0 g/10 min, tensile strength in a cross-machine direction is in the range of 5 to 10 MPa and tensile elongation in the cross-machine direction is 300% or more.Type: GrantFiled: June 25, 2012Date of Patent: March 11, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Yasuhiro Yamamoto, Hitoshi Satou, Kazuyuki Fukudome
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Patent number: 8652686Abstract: A composite solid electrolyte includes a monolithic solid electrolyte base component that is a continuous matrix of an inorganic active metal ion conductor and a filler component used to eliminate through porosity in the solid electrolyte. In this way a solid electrolyte produced by any process that yields residual through porosity can be modified by the incorporation of a filler to form a substantially impervious composite solid electrolyte and eliminate through porosity in the base component. Methods of making the composites are also disclosed. The composites are generally useful in electrochemical cell structures such as battery cells and in particular protected active metal anodes, particularly lithium anodes, that are protected with a protective membrane architecture incorporating the composite solid electrolyte.Type: GrantFiled: November 9, 2012Date of Patent: February 18, 2014Assignee: PolyPlus Battery CompanyInventors: Steven J. Visco, Lutgard C. De Jonghe, Yevgeniy S. Nimon
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Publication number: 20140045033Abstract: A battery separator for a secondary lithium battery includes a microporous/porous membrane with a ceramic coating of one or more layers, a layer may include one or more particles and/or binders.Type: ApplicationFiled: August 7, 2013Publication date: February 13, 2014Applicant: Celgard LLCInventors: Zhengming Zhang, Xuefa Li, Lie Shi, Premanand Ramadass, Paul M. Halmo, Xiaomin Zhang
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Publication number: 20140038026Abstract: An electrochemical energy store including a cathode space, an anode space, at least one electrolyte solution, the electrolyte solution being in the cathode space and in the anode space, and at least one separator, to separate the cathode space from the anode space. The separator includes a diaphragm, and the diaphragm has a permeability to molecules smaller than or equal to 250 Dalton, the diaphragm having a valence-dependent permeability to the molecules. In addition, also described is a separator for the electrochemical energy store, a method for manufacturing a diaphragm for the separator, and the use of the electrochemical energy store in an electrical device. The long-term stability of the electrochemical energy store may be increased by the present system.Type: ApplicationFiled: July 31, 2013Publication date: February 6, 2014Applicant: Robert Bosch GmbHInventor: Ulrich HASENKOX
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Publication number: 20140017549Abstract: An energy storage device including a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the negative electrode includes non-graphitizable carbon as a negative electrode active material, and the separator has a thickness of 10 to 30 ?m and an air permeability of 10 to 180 sec/100 cc.Type: ApplicationFiled: July 9, 2013Publication date: January 16, 2014Inventors: Akihiko Miyazaki, Sumio Mori, Tomonori Kako, Kenta Nakai
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Publication number: 20140011068Abstract: A non-aqueous electrolyte secondary battery comprising a positive electrode plate contains a positive electrode active material capable of absorbing and releasing lithium reversibly, a negative electrode plate containing a negative electrode active material capable of absorbing and releasing lithium reversibly, a separator keeping the positive electrode plate and the negative electrode plate isolated, and a non-aqueous electrolytic solution containing a non-aqueous solvent and an electrolyte salt, wherein the positive electrode plate has a surface on which an inorganic particle layer containing inorganic particles and a binder is formed, and the separator is a polyolefin microporous film including a laminate film having at least two layers and containing inorganic particles in at least a negative-electrode-side surface layer thereof. This configuration can improve storage properties and reduce swelling under high-temperature environment.Type: ApplicationFiled: March 21, 2012Publication date: January 9, 2014Applicant: SANYO ELECTRIC CO., LTD.Inventors: Noriko Yamashita, Masato Iwanaga
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Patent number: 8623556Abstract: This invention provides a novel battery structure that, in some variations, utilizes a mixed lithium-ion and electron conductor as part of the separator. This layer is non-porous, conducting only lithium ions during operation, and may be structurally free-standing. Alternatively, the layer can be used as a battery electrode in a lithium-ion battery, wherein on the side not exposed to battery electrolyte, a chemical compound is used to regenerate the discharged electrode. This battery structure overcomes critical shortcomings of current lithium-sulfur, lithium-air, and lithium-ion batteries.Type: GrantFiled: March 26, 2013Date of Patent: January 7, 2014Assignee: HRL Laboratories, LLCInventor: Ping Liu
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Patent number: 8615869Abstract: A system of assembling storage devices in the form of electrical energy modules includes two pairs of positive and negative terminals for each module, in which each of the pairs of positive and negative terminals is distributed over at least one of the external faces of each module, thus forming a terminal strip of the module. At least one interconnection block can be inserted onto part of each of the terminal strips of two separate modules and itself includes at least two pairs of anchoring points so as to form an assembly block, either by stacking the storage modules or by juxtaposing the same. At least two anchoring points of each interconnection block are in electrical contact, while stiffening the assembly, in a manner complementary to the other anchoring points.Type: GrantFiled: November 28, 2008Date of Patent: December 31, 2013Assignee: Siemens SASInventor: Eric Chattot
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Publication number: 20130344375Abstract: The invention generally relates to polymer film, and more particularly relates to polymeric membranes, methods for producing such membranes, and the use of such membranes as battery separator film. In an embodiment, the invention relates to liquid-permeable multi-layer microporous membranes comprising microlayers. According to the invention, liquid-permeable multi-layer microporous membranes having excellent physical properties including permeability can be produced without causing delaminate.Type: ApplicationFiled: January 10, 2012Publication date: December 26, 2013Applicant: TORAY BATTERY SEPARATOR FILM CO., LTD.Inventors: Patrick Brant, Richard V. Gebben, Koichi Kono, Takeshi Ishihara
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Publication number: 20130337312Abstract: There are provided a separator for electrochemical devices and a method of manufacturing the separator, and more particularly, a thin film separator for electrochemical devices which is improved in thermal stability and can be high-density charged for high capacity by employing a coating layer formed of an inorganic oxide thin film directly on a porous substrate and a method of manufacturing the separator using a film deposition method.Type: ApplicationFiled: October 17, 2011Publication date: December 19, 2013Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Jong Hyeok Park, Min Kim
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Publication number: 20130330592Abstract: A composite porous membrane is a composite porous membrane, wherein a porous membrane B including a heat-resistant resin is laminated on the surface of a polypropylene resin of an outermost layer of a porous membrane A composed of at least one layer, wherein at least one of the outermost layers comprises the polypropylene resin. The composite porous membrane satisfies a particular range of peeling strength at the interface between the porous membrane A and the porous membrane B and a particular range of difference between air resistance of the whole composite porous membrane and air resistance of the porous membrane A, provided that the porous membrane A satisfies a particular range of average pore size and porosity.Type: ApplicationFiled: August 29, 2011Publication date: December 12, 2013Applicant: TORAY BATTERY SEPARATOR FILM CO., LTD.Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
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Patent number: 8603680Abstract: Electrode protection in electrochemical cells, and more specifically, electrode protection in both aqueous and non-aqueous electrochemical cells, including rechargeable lithium batteries, are presented. In one embodiment, an electrochemical cell includes an anode comprising lithium and a multi-layered structure positioned between the anode and an electrolyte of the cell. A multi-layered structure can include at least a first single-ion conductive material layer (e.g., a lithiated metal layer), and at least a first polymeric layer positioned between the anode and the single-ion conductive material. The invention also can provide an electrode stabilization layer positioned within the electrode to control depletion and re-plating of electrode material upon charge and discharge of a battery.Type: GrantFiled: November 15, 2012Date of Patent: December 10, 2013Assignee: Sion Power CorporationInventors: John D. Affinito, Yuriy V. Mikhaylik, Yordan M. Geronov, Christopher J. Sheehan
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Publication number: 20130323570Abstract: A nonaqueous electrolyte secondary battery has a positive electrode plate containing a positive electrode active material capable of reversibly absorbing and desorbing lithium; a negative electrode plate containing a negative electrode active material capable of reversibly absorbing and desorbing lithium; a separator separating the positive electrode plate and the negative electrode plate; and a nonaqueous electrolyte solution obtained by dissolving a solute in an organic solvent, said solute being composed of a lithium salt. In this battery, a polyolefin microporous membrane is used as the separator formed of a multilayer film having two or more layers and at least one of two surface layers of said polyolefin microporous membrane containing inorganic particles.Type: ApplicationFiled: February 22, 2012Publication date: December 5, 2013Applicant: SANYO ELECTRIC CO., LTD.Inventor: Masato Iwanaga
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Publication number: 20130320758Abstract: A liquid lead storage battery includes a negative electrode plate, a positive electrode plate and an electrolyte solution. The both plates are arranged so as to face each other in a thickness direction and immersed in the electrolyte solution. The negative electrode plate includes an active material containing carbon. An elastic sheet formed of a porous material is arranged between the negative electrode plate and the positive electrode plate so as to press the negative electrode plate from both sides in the thickness direction.Type: ApplicationFiled: February 20, 2012Publication date: December 5, 2013Applicant: GS YUASA INTERNATIONAL LTD.Inventor: Yoshiomi Fujiwara
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Patent number: 8597819Abstract: A separator for an electrochemical cell, comprising (A) a flexible perforate support, and (B) a porous ceramic material which fills the perforations in the support and is suitable for receiving an ion-conducting electrolyte, wherein the porous ceramic material comprises a first porous layer which is characterized by an average pore size and also at least one second porous layer for contacting with an electrode, the second porous layer having an average pore size which is smaller than the average pore size of the first porous layer.Type: GrantFiled: July 8, 2009Date of Patent: December 3, 2013Assignee: Evonik Degussa GmbHInventors: Volker Hennige, Christian Hying, Gerhard Hoerpel, Petr Novak, Jens Vetter
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Patent number: 8592075Abstract: The invention relates to a unique battery having a physicochemically active membrane separator/electrolyte-electrode monolith and method of making the same. The Applicant's invented battery employs a physicochemically active membrane separator/electrolyte-electrode that acts as a separator, electrolyte, and electrode, within the same monolithic structure. The chemical composition, physical arrangement of molecules, and physical geometry of the pores play a role in the sequestration and conduction of ions. In one preferred embodiment, ions are transported via the ion-hoping mechanism where the oxygens of the Al2O3 wall are available for positive ion coordination (i.e. Li+). This active membrane-electrode composite can be adjusted to a desired level of ion conductivity by manipulating the chemical composition and structure of the pore wall to either increase or decrease ion conduction.Type: GrantFiled: July 24, 2012Date of Patent: November 26, 2013Assignee: U.S. Department of EnergyInventors: Rex E. Gerald, II, Katarina J. Ruscic, Devin N. Sears, Luis J. Smith, Robert J. Klingler, Jerome W. Rathke
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Patent number: 8592082Abstract: A secondary battery includes an electrode assembly, which has improved safety by reducing a density of an active material centrally positioned in the electrode assembly. In the secondary battery, an electrode assembly includes a first electrode plate, a second electrode plate and a separator between the first electrode plate and the second electrode plate, the first electrode plate including a first electrode current collector and a first active material layer on the first electrode current collector, the first active material layer including a first active material, a binder and a conductive agent, and a portion of the first active material layer at a central portion of the electrode assembly including the first active material at a lower density than a density of the first active material at a portion of the first active material layer at a peripheral portion of the electrode assembly.Type: GrantFiled: July 18, 2012Date of Patent: November 26, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Chanho Lee, Kiwoon Kim, Young Ju Ahn, Jinho Lee, Junpyo Park
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Publication number: 20130309549Abstract: Disclosed are membranes suitable for use as separators in electrochemical cells as well as electrochemical cells, where the membranes are configured to substantially reduce the passage of multivalent ions therethrough without substantially reducing the permeability of the membranes to lithium ions.Type: ApplicationFiled: January 11, 2012Publication date: November 21, 2013Applicant: ETV ENERGY LTD.Inventors: Shalom Luski, Charles Linder, Arieh Meitav
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Publication number: 20130309548Abstract: The invention relates to microporous polymeric membrane having a good balance of rupture temperature and air permeability. The invention also relates to a battery separator formed by such a microporous membrane, and a battery comprising such a separator. Another aspect of the invention relates to a method for making the microporous polymeric membrane, a method for making a battery using such a membrane as a separator, and a method for using such a battery.Type: ApplicationFiled: April 30, 2013Publication date: November 21, 2013Applicant: Toray Battery Separator Film Co., Ltd.Inventor: Toray Battery Separator Film Co., Ltd.
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Patent number: 8580417Abstract: An electrode assembly and a secondary battery including the same. The electrode assembly is constructed with a positive electrode plate including a positive electrode coating portion, a negative electrode plate including a negative electrode coating portion, a separator interposed between the positive electrode plate and the negative electrode plate, and at least one mesh layer disposed on at least one of the positive electrode plate and the negative electrode plate. The mesh layer is wider than either the positive electrode coating portion or the negative electrode coating portion to prevent a detachment of either the positive electrode coating portion or the negative electrode coating portion. Since the mesh layer prevents the detachment of the electrode coating portions when subjected to an external impact, it is possible to improve the stability and reliability of a battery.Type: GrantFiled: March 6, 2008Date of Patent: November 12, 2013Assignee: Samsung SDI Co., Ltd.Inventor: Jinhee Kim
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Publication number: 20130288103Abstract: A composite porous membrane used as a separator for a battery includes a porous membrane A made of a polyolefin resin and a porous membrane B containing a heat-resistant resin laminated thereto, wherein the surface of the porous membrane B on the side that does not face the porous A has a three-dimensional network structure having nodes, and the peeling interface on the side of the porous membrane B formed when the porous membrane A and the porous membrane B are peeled off has a membrane morphology having pores with a pore size of 50 to 500 nm in an amount of at least 100 pores/10 ?m2.Type: ApplicationFiled: August 29, 2011Publication date: October 31, 2013Applicant: Toray Battery Separator Film Co., Ltd.Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
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Publication number: 20130273409Abstract: Embodiments of the invention provide methods and apparatuses for enhancing electron flow within a battery, such as a lead-acid battery. In one embodiment, a battery separator may include a conductive surface or layer upon which electrons may flow. The battery separator may include a fiber mat that includes a plurality of electrically insulative fibers. The battery separator may be positioned between electrodes of the battery to electrically insulate the electrodes. The battery separator may also include a conductive material disposed on at least one surface of the fiber mat. The conductive material may contact an electrode of the battery and may have an electrical conductivity that enables electron flow on the surface of the fiber mat.Type: ApplicationFiled: April 12, 2012Publication date: October 17, 2013Inventors: Souvik Nandi, Zhihua Guo, Jawed Asrar, Albert G. Dietz, III
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Publication number: 20130260200Abstract: Provided is a method for fabrication of a jelly-roll type electrode assembly having a cathode/separation membrane/anode laminate structure, including: (a) coating both sides of a porous substrate with organic/inorganic composite layers, each of which includes inorganic particles and an organic polymer as a binder, so as to fabricate a composite membrane; and (b) inserting one end of a sheet laminate comprising a cathode sheet and an anode sheet as well as the composite membrane into a mandrel, winding the sheet laminate around the mandrel, and then, removing the mandrel, wherein the organic/inorganic composite layer includes microfine pores capable of moderating a variation in volume during charge/discharge of a secondary battery and an interfacial friction coefficient between the composite membrane and the mandrel is not more than 0.28.Type: ApplicationFiled: May 30, 2013Publication date: October 3, 2013Inventors: Youngkwang YUN, Sangbaek RYU, Jinsoo LEE, SooRyoung KIM, Byungjin CHOI, Hyang Mok LEE
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Publication number: 20130260208Abstract: The present invention provides a separator having a porous substrate; and a porous coating layer formed on one surface of the porous substrate and comprising a mixture of inorganic particles and a binder polymer, which has a value of a porosity×an air permeability per thickness in the range of 5 to 40, the porosity and the air permeability per thickness. The separator having a porous coating layer according to the present invention has a porosity which is controlled depending on the air permeability of the porous substrate, and thus exhibit superior ionic conductivity as well as good mechanical properties, thereby contributing to improve the performance and safety of an electrochemical device.Type: ApplicationFiled: May 28, 2013Publication date: October 3, 2013Applicant: LG Chem, Ltd.Inventors: Byeong-Gyu Cho, Jeong-Min Ha, Su-Jin Yoon, Jong-Hun Kim, Byoung-Jin Shin
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Publication number: 20130252067Abstract: A method is presented for producing polyolefin microporous membranes which are superior in thermal stability and are particularly useful as a separator for a lithium ion battery. A process including a first step of melting polyolefini resin and mixing together at least melted polyolefin resin, organosiloxane particles including a polysiloxane cross-linked structure and having a spherical or golfball shape with an average particle diameter of 0.01-10 ?m and a plasticizer to obtain a melted mixture, a second step of molding this mixture and biaxially stretching molded product to obtain a stretched film and a third step of extracting and removing the plasticizer from the stretched film is carried out, if a membrane having a single film layer is to be produced, to obtain this single film layer and, if a membrane having two or more laminated film layer is to be produced, to obtain the film layers on both outsides.Type: ApplicationFiled: May 24, 2013Publication date: September 26, 2013Inventor: Ippei Noda
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Patent number: 8541129Abstract: The present invention relates to a physicochemically-active porous membrane for electrochemical cells that purports dual functions: an electronic insulator (separator) and a unidirectional ion-transporter (electrolyte). The electrochemical cell membrane is activated for the transport of ions by contiguous ion coordination sites on the interior two-dimensional surfaces of the trans-membrane unidirectional pores. One dimension of the pore surface has a macroscopic length (1 nm-1000 ?m) and is directed parallel to the direction of an electric field, which is produced between the cathode and the anode electrodes of an electrochemical cell. The membrane material is designed to have physicochemical interaction with ions. Control of the extent of the interactions between the ions and the interior pore walls of the membrane and other materials, chemicals, or structures contained within the pores provides adjustability of the ionic conductivity of the membrane.Type: GrantFiled: July 19, 2010Date of Patent: September 24, 2013Assignee: U.S. Department of EnergyInventors: Rex E. Gerald, II, Katarina J. Ruscic, Devin N. Sears, Luis J. Smith, Robert J. Klingler, Jerome W. Rathke
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Publication number: 20130244082Abstract: The separator of the present invention comprises a porous composite having a porous substrate and a first porous coating layer formed on at least one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on a first surface of the porous composite and comprising a mixture of cathode active material particles, a second binder polymer and a first conductive material, a third porous coating layer formed on a second surface of the porous composite and comprising a mixture of anode active material particles, a third binder polymer and a second conductive material, or both of the second porous coating layer and the third porous coating layer. Also, the separator of present invention may further comprise a fourth porous coating layer formed on at least one outermost surface thereof and comprising a fourth binder polymer.Type: ApplicationFiled: March 27, 2013Publication date: September 19, 2013Applicant: LG Chem, Ltd.Inventors: Joo-Sung Lee, Jong-Hun Kim, Jin-Woo Kim
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Publication number: 20130236767Abstract: An example of the present invention is provided with porous sheets 11, 21 each formed by layering a porous base material including a polyolefin and a heat-resistant porous layer including a heat-resistant resin. The porous sheets 11, 21, respectively, are connected at connecting regions 15a and 15b, 25a and 25b, respectively, which have been formed by thermal fusion of the heat-resistant porous layers facing each other by folding the sheets. Furthermore, the porous sheets 11, 21 are additionally connected at a connecting region 27 that has been formed by thermal fusion.Type: ApplicationFiled: October 21, 2011Publication date: September 12, 2013Applicant: TEIJIN LIMITEDInventors: Satoshi Nishikawa, Hiroki Sano, Takashi Yoshitomi
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Patent number: 8530097Abstract: A secondary battery including an electrode assembly including a positive electrode including a positive electrode active material layer, a negative electrode including a negative electrode active material layer, a separator separating the positive and negative electrodes from each other, and an electrolyte. The separator includes a porous layer comprising a ceramic material and a binder, and a polyolefin-based resin layer. The porous layer has a centerline average roughness (Ra) of 0.3 ?m to 1.5 ?m, the polyolefin-based resin layer has a porosity of 30% to 60%, and the polyolefin-based resin layer has a compressibility of 4% to 10%.Type: GrantFiled: March 27, 2009Date of Patent: September 10, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Jin-Hee Kim, Wan-Mook Lim
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Publication number: 20130224558Abstract: Disclosed is a microporous composite film having a coating layer formed on at least one surface of a microporous polyolefin film, wherein the coating layer simultaneously includes a high thermostable polymer resin and inorganic particles. More specifically, the present invention relates to a microporous composite film in which an area shrinkage at 170° C. for 1 hr is 10% or less; a tensile modulus in each of a machine direction and a transverse direction at 130° C. is 0.5 MPa to 7.0 MPa; a ratio between permeability of a microporous composite film (CCSp) and permeability of a microporous polyolefin film (Sp) is 1.1?CCSp/Sp?3.5; and a permeability of the microporous composite film is 450 sec or less.Type: ApplicationFiled: June 10, 2011Publication date: August 29, 2013Applicant: SK INNOVATION CO., LTD.Inventors: Yong Kyoung Kim, Jang Weon Rhee, Dong Jin Joo, Je An Lee, Jung Moon Sung
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Publication number: 20130224560Abstract: Disclosed is a separator for a non-aqueous electrolyte battery, the separator including a polyolefin microporous substrate in which a content of polyolefin having a molecular weight of 100,000 or less is from 10% by mass to 25% by mass relative to a total amount of polyolefin, and a heat resistant porous layer that is formed on one or both sides of the polyolefin microporous substrate and that includes a heat resistant polymer, wherein a maximum value of S, which is represented by the following formula (1), is 0.8 or more, and a temperature exhibiting the maximum value of S is from 130° C. to 155° C.: S=d(log R)/dT??Formula (1) wherein R represents a resistance (ohm·cm2) of a cell, and T represents a temperature (° C.), in a measurement using a battery that includes the cell that is provided with a separator for a non-aqueous electrolyte battery, at a temperature rising rate of 1.6° C./min.Type: ApplicationFiled: October 21, 2011Publication date: August 29, 2013Applicant: TEIJIN LIMITEDInventor: Takashi Yoshitomi
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Publication number: 20130224559Abstract: A separator for a nonaqueous electrolyte secondary battery that at least includes a resin (A) having a crosslinked structure, which is obtained by irradiating with an energy ray an oligomer polymerizable by irradiation with an energy ray. The separator has an average pore size of 0.005 to 0.5 ?m, an air permeability of 50 sec/100 mL or more and less than 500 sec/100 mL, where the air permeability is expressed as a Gurley value, and a thermal shrinkage of less than 2% at 175° C. The separator for a nonaqueous secondary battery can be produced by the production method of the present invention, which includes the steps of: applying to a substrate a separator forming composition containing the oligomer, two or more kinds of solvents having different polarity from each other, and the like; irradiating the applied composition with an energy ray; and drying the energy ray-irradiated composition.Type: ApplicationFiled: February 23, 2012Publication date: August 29, 2013Applicant: HITACHI, LTD.Inventors: Takahiro Furutani, Eri Kojima, Toshiyuki Watanabe, Kunihiko Koyama
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Publication number: 20130216893Abstract: A nonaqueous electrolyte lithium secondary battery obtained by the present invention has a separator and a porous layer which contains an inorganic filler and a binder and which is formed on the separator, wherein a thickness of the separator ranges from 12 ?m to 18 ?m, a porosity of the separator ranges from 52% to 67%, a thickness of the porous layer ranges from 3 ?m to 15 ?m, a porosity of the porous layer ranges from 44% to 70%, and the porous layer-attached separator exhibits a film resistance equal to or lower than 1.35 ?·cm2 when impregnated with an electrolyte solution.Type: ApplicationFiled: October 13, 2010Publication date: August 22, 2013Inventors: Tomoyoshi Ueki, Harunari Shimamura, Yusuke Fukumoto
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Publication number: 20130209861Abstract: Disclosed is an organic/inorganic composite porous film, having: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. Further disclosed is a porous film having: (a) a porous substrate having pores; and (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of the pores present in the substrate, wherein the coating layer comprises styrene-butadiene rubber. Also disclosed is an electrochemical device containing the organic/inorganic composite porous film, a method of manufacturing the film.Type: ApplicationFiled: March 12, 2013Publication date: August 15, 2013Applicant: LG CHEM, LTD.Inventor: LG Chem, Ltd.
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Patent number: 8507124Abstract: The invention relates to a multi-layer, microporous membrane having appropriate permeability, pin puncture strength, shutdown temperature, shutdown speed, meltdown temperature, and thickness uniformity. The invention also relates to a battery separator formed by such multi-layer, microporous membrane, and a battery comprising such a separator. Another aspect of the invention relates to a method for making the multi-layer, microporous polyolefin membrane, a method for making a battery using such a membrane as a separator, and a method for using such a battery.Type: GrantFiled: November 14, 2007Date of Patent: August 13, 2013Assignee: Toray Battery Separator Film Co., Ltd.Inventors: Koichi Kono, Kohtaro Kimishima, Hiroyuki Ozaki, Patrick Brant, Jeffrey L. Brinen, Zerong Lin
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Publication number: 20130183570Abstract: Disclosed is an organic/inorganic composite porous film comprising: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. A method for manufacturing the same film and an electrochemical device including the same film are also disclosed. An electrochemical device comprising the organic/inorganic composite porous film shows improved safety and quality.Type: ApplicationFiled: March 5, 2013Publication date: July 18, 2013Applicant: LG CHEM, LTD.Inventor: LG Chem, Ltd.
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Patent number: 8486556Abstract: A multi-layer microporous battery separator which comprises: a high molecular weight polypropylene layer having a melt flow index of ?1.2 measured at layer; a polyethylene layer; and a high molecular weight polypropylene layer having a melt flow index of ?1.2 measured at layer. The resulting microporous battery separator which is formed by a dry stretch process produces the microporous battery separator which has a porosity of ?37% while maintaining a gurley from 13-25 seconds and a thickness of ?25 microns.Type: GrantFiled: April 7, 2010Date of Patent: July 16, 2013Assignee: Celgard LLCInventors: Ronald W. Call, Lie Shi, Zhengming Zhang, Shizuo Ogura, Xiangyun Wei, Premanand Ramadass
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Patent number: 8486555Abstract: A process for producing a porous laminate having many micropores interconnected in the thickness direction, which comprises: a step in which a laminate is produced which comprises at least three layers comprising an interlayer made of a thermoplastic resin having a hard segment and a soft segment and two nonporous outer layers made of a filler-containing resin and located as outer layers respectively on both sides of the interlayer; a step in which the laminate obtained is impregnated with a supercritical or subcritical fluid and this state is relieved to vaporize the fluid and thereby make the interlayer porous; and a step in which the two nonporous outer layers located respectively on both sides are made porous by stretching.Type: GrantFiled: September 21, 2006Date of Patent: July 16, 2013Assignee: Mitsubishi Plastics, Inc.Inventors: Yasushi Usami, Tomoyuki Nemoto, Jun Takagi, Satoshi Teshima
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Patent number: 8481195Abstract: This invention provides a novel battery structure that, in some variations, utilizes a mixed lithium-ion and electron conductor as part of the separator. This layer is non-porous, conducting only lithium ions during operation, and may be structurally free-standing. Alternatively, the layer can be used as a battery electrode in a lithium-ion battery, wherein on the side not exposed to battery electrolyte, a chemical compound is used to regenerate the discharged electrode. This battery structure overcomes critical shortcomings of current lithium-sulfur, lithium-air, and lithium-ion batteries.Type: GrantFiled: April 14, 2010Date of Patent: July 9, 2013Assignee: HRL Laboratories, LLCInventor: Ping Liu
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Publication number: 20130171501Abstract: Provided is a separator including a plate-like porous substrate, and a porous thin-film coating layer formed on at least one surface of the plate-like porous substrate, and containing crosslinked polyester formed by polymerization of a multifunctional phenol compound having at least two phenol groups with a multifunctional acyl halide compound of an aromatic compound having at least two acyl halide groups. The crosslinked polyamide coating layer hardly affects the air permeability of the separator. Also, the crosslinked polyamide coating layer has good hydrophilicity and wettability to an electrolyte, and thus may improve the performance of the battery. Also, the crosslinked polyamide coating layer has excellent resistance to heat and deformation, and thus may prevent the thermal shrinkage of the separator.Type: ApplicationFiled: February 26, 2013Publication date: July 4, 2013Applicant: LG CHEM, LTD.Inventor: LG CHEM, LTD.
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Publication number: 20130171500Abstract: Provided are separators for use in batteries and capacitors comprising (a) at least 50% by weight of an aluminum oxide and (b) an organic polymer, wherein the aluminum oxide is surface modified by treatment with an organic acid to form a modified aluminum oxide, and wherein the treatment provides dispersibility of the aluminum oxide in aprotic solvents such as N-methyl pyrrolidone. Preferably, the organic acid is a sulfonic acid, such as p-toluenesulfonic acid. Also preferably, the organic polymer is a fluorinated polymer, such as polyvinylidene fluoride. Also provided are electrochemical cells and capacitors comprising such separators.Type: ApplicationFiled: January 18, 2013Publication date: July 4, 2013Applicants: Sihl GmbH, Optodot CorporationInventors: Optodot Corporation, Sihl GmbH
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Publication number: 20130171499Abstract: A porous membrane contains a polyethylene resin, in a core layer, pores of sizes that are relatively larger than those of pores in each of skin layers on the opposite sides are distributed, and the skin layers on the opposite sides have substantially same pore characteristics. A method for manufacturing a porous membrane includes the steps of: obtaining a mixture of a liquid-type paraffin oil and a solid-type paraffin wax; adding the mixture to a polyethylene resin to obtain a raw material resin mixture; extruding and cooling the raw material resin mixture; stretching the raw material resin mixture; and immersing the stretched raw material resin mixture in an organic solvent to extract a mixture of the oil and the wax.Type: ApplicationFiled: October 5, 2012Publication date: July 4, 2013Inventors: Jae Won Yang, Si Ju Ryu, Seong Tae Kim, Byung Hyunn Kim, Jung Goo Park, Hee Min Cho
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Publication number: 20130171498Abstract: A method of fabricating a separator is provided. The method includes providing a porous non-woven substrate, and coating a first resin on the non-woven substrate, wherein the first resin includes hydrophilic oxyalkyl compounds, oxyalkyl polymers, oxyalkenyl alkyl polymers or derivatives thereof. The disclosure also provides a separator prepared by the method.Type: ApplicationFiled: August 8, 2012Publication date: July 4, 2013Inventors: Jung-Ching HSING, Tzu-Hsien Han, Shu-Hui Cheng, Wan-Shu Chen
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Publication number: 20130164597Abstract: Provided is a microporous separator for a lithium secondary battery having shutdown properties wherein the separator comprises a propylene random copolymer which has a melt index of 0.5-10 g/10 minutes and comprises one or more species of comonomers in the content of 0.1-8 wt %.Type: ApplicationFiled: December 20, 2012Publication date: June 27, 2013Applicant: SAMSUNG TOTAL PETROCHEMICALS CO., LTD.Inventor: SAMSUNG TOTAL PETROCHEMICALS CO., LTD.