Rubber Or Thermoplastic Resin Patents (Class 429/254)
  • Patent number: 10593984
    Abstract: The present invention has an object to provide (i) a nonaqueous electrolyte secondary battery separator having excellent ion permeability and (ii) an insulating porous layer by which to achieve the nonaqueous electrolyte secondary battery separator. The insulating porous layer is a nonaqueous electrolyte secondary battery insulating porous layer containing: a resin A; and a resin B, the resin A and the resin B having therebetween a Hansen solubility parameter distance (HSP distance) (Ra) of not more than 10 MPa1/2.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: March 17, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroki Hashiwaki, Junji Suzuki, Syuichi Nakamoto
  • Patent number: 10454088
    Abstract: Electrochemical device (e.g., a capacitive device, a battery, or hybrid device) comprising a configuration of layers comprising at least one combination, wherein each combination comprises a porous particulate separator layer disposed between a first porous electrode layer and a second porous electrode layer, and optionally at least one particulate current collector layer, and a liquid electrolyte, wherein all the combinations, optional particulate current collector layers, and liquid electrolyte are encased in a package, and wherein essentially all the liquid electrolyte is confined within the configuration of layers. Capacitive electrochemical device comprising a first combination comprising a porous particulate separator layer disposed between a first porous electrode layer and a second porous electrode layer, optionally at least one particulate current collector layer, and a liquid electrolyte.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: October 22, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Kenton D. Budd, Daimon K Heller
  • Patent number: 10090563
    Abstract: A rechargeable lithium battery and a method of preparing the same are described. The rechargeable lithium battery includes a positive electrode including a positive active material; a negative electrode including a negative active material; and a liquid electrolyte including a lithium salt and a non-aqueous organic solvent. A separator is interposed between the negative electrode and positive electrode and includes a support. A fluoro-based polymer layer is positioned on both sides of the support. The positive electrode includes the positive active material in an amount from about 30 to about 70 mg/cm2.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: October 2, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Se-Ho Park
  • Patent number: 10062890
    Abstract: As a laminated porous film realizing excellent handling properties in a low-humidity environment, a laminated porous film in which a layer containing a polymer is laminated on at least one side of a polyolefin porous film, satisfying the following (1) and (2) is provided. (1) When the laminated porous film has left still for 1 hour in an environment at a temperature of 23° C. and a humidity of 50%, a lifting amount of the side parallel with the direction perpendicular to the machine direction is 8 mm or more. (2) When the laminated porous film has left still for 1 hour in an environment at a temperature of 23° C. and a humidity of 5%, a lifting amount of the side parallel with the machine direction is 15 mm or less.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: August 28, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Jian Wang, Hirohiko Hasegawa
  • Patent number: 9994656
    Abstract: A process for polymerizing propylene in the presence of a polymerization catalyst by polymerizing propylene with a comonomer selected from the group of ethylene and C4-C10 alpha-olefins in two polymerization stages where the comonomer is present in at least one of the polymerization stages. The first polymerization stage is conducted in a loop reactor and the second polymerization stage in a gas phase reactor. The polymer produced in first polymerization stage has a higher melt flow rate and a lower content of comonomer units than the final polymer mixture. The process can be operated with a high throughput and catalyst productivity. The polymers are useful for making films.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: June 12, 2018
    Assignee: BOREALIS AG
    Inventors: Torvald Vestberg, Kauno Alastalo
  • Patent number: 9941499
    Abstract: Provided is a nonaqueous electrolyte secondary battery separator that has (i) an excellent ion permeability and (ii) reduced occurrence of a leak defect despite a small thickness. The nonaqueous electrolyte secondary battery separator includes a porous film containing polyolefin as a main component, the nonaqueous electrolyte secondary battery separator having a Gurley value within a range of 50 sec/100 cc to 200 sec/100 cc, the nonaqueous electrolyte secondary battery separator having a thickness within a range of 3 ?m to 16 ?m, the nonaqueous electrolyte secondary battery separator satisfying 0.85?((SMD/Sm)+(STD/Sm))/2?0.91.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 10, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Hirohiko Hasegawa
  • Patent number: 9911959
    Abstract: A multilayer porous membrane comprising a porous membrane containing a polyolefin resin as a main component; and a porous layer containing an inorganic filler and a resin binder and laminated on at least one surface of the porous membrane; wherein the porous membrane has an average pore size d=0.035 to 0.060 ?m, a tortuosity ?a=1.1 to 1.7, and the number B of pores=100 to 500 pores/?m2, which are calculated by a gas-liquid method, and the porous membrane has a membrane thickness L=5 to 22 ?m.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: March 6, 2018
    Assignee: Asahi Kasei E-materials Corporation
    Inventors: Hiroshi Murata, Hiroshi Hatayama, Yuki Uchida, Masaki Ishikawa
  • Patent number: 9911956
    Abstract: A polyolefin microporous membrane includes a polyethylene composition, and 0.5% or more but less than 5% by mass of polypropylene, wherein the polyethylene composition includes polyethylene having a mass average molecular weight of 2.5×105 to 5×105 and ultrahigh molecular weight polyethylene having a mass average molecular weight of 1×106 to 3×106 in an amount of more than 5% by mass and not more than 50% by mass based on 100% by mass of polyethylene composition and has a molecular weight distribution (Mw/Mn) of 5.0 to 300, and the polyolefin microporous membrane has an injection of electrolyte of 20 seconds or less and a uniform polypropylene distribution in at least one plane perpendicular to the thickness direction.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: March 6, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Takeshi Ishihara, Koichi Kono
  • Patent number: 9876209
    Abstract: The invention relates to a thermoplastic polymer-based battery separator, which contains a compound of formula R (OR1)n(COOMx+1/x)m. In said formula, R represents a non-aromatic hydrocarbon group comprising between 10 and 4,200 carbon atoms, which can be interrupted by oxygen atoms, R1 represents H, —(CH2)kCOOMx+1/x or —(CH2)k—SO3Mx+1/x, whereby k stands for 1 or 2, M represents an alkali or earth alkaline metal ion, H+ or NH4+, whereby not all variables of M are defined simultaneously as H+, n stands for 0 or 1, m stands for 0 or a whole number from 10 to 1,400 and x stands for 1 or 2. The ratio of oxygen atoms to carbon atoms in the compound according to the aforementioned formula ranges between 1:1.5 and 1:30 and n and m cannot simultaneously represent zero.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: January 23, 2018
    Assignee: Daramic, Inc.
    Inventors: Jörg Deiters, Klaus Heinrich Ihmels
  • Patent number: 9786921
    Abstract: There is provided a secondary battery including a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein at least one of the positive electrode and the negative electrode contains a granular solid electrolyte and a granular conduction aid both bonded to a surface of a granular electrode active substance.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: October 10, 2017
    Assignee: SONY CORPORATION
    Inventors: Tatsuya Furuya, Yuri Nakayama
  • Patent number: 9722225
    Abstract: The present invention provides a polyolefin microporous membrane made of a polyolefin resin and an inorganic particle, and the puncture strength of the microporous membrane is 3 N/20 ?m or more and the membrane thickness retention ratio in penetration creep is 16% or more, thereby being excellent in safety and long-term reliability, and a separator for a nonaqueous electrolyte battery, and the like can be provided.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: August 1, 2017
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Hiroshi Hatayama, Hiroshi Sogo
  • Patent number: 9698397
    Abstract: A battery includes a flat wound electrode body formed by winding a positive electrode sheet and a negative electrode sheet with a separator interposed therebetween into a flat shape. The separator has an outer edge adjacent portion adjacent to either an outer edge of a positive electrode active material layer or an outer edge of a negative electrode active material layer. In a curve positioned portion disposed at least in a curved portion of the flat wound electrode body, the outer edge adjacent portion has a suppression portion for suppressing the occurrence or development of a crack.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: July 4, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyoshi Ueki, Harunari Shimamura, Yusuke Fukumoto
  • Patent number: 9276286
    Abstract: Disclosed is a secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case, wherein a plate-shaped insulator mounted on the top of the jelly-roll includes a molded article made of a polymer resin or a polymer composite and a plurality of fine pores is perforated through the molded article.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: March 1, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Do Gyun Kim, Dong-Myung Kim, Dong Sub Lee, Sang Bong Nam, Sang Sok Jung
  • Patent number: 9246150
    Abstract: A non-aqueous electrolyte battery in which formation of a flame retardant layer formed on the surface of an electrode or the like hardly affects the discharge characteristics is provided. A non-aqueous electrolyte battery 1 includes a positive electrode 3, a negative electrode 5, and a separator 7. A porous layer having ion permeability is formed using a flame retardant material on a surface of the positive electrode 3. The porous layer is formed by applying a hot melt, which is a fused flame retardant material made of a thermoplastic resin, to the surface of the positive electrode 3.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: January 26, 2016
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Tomonobu Tsujikawa, Masayasu Arakawa, Hiroo Nishiyama, Katsuhide Aichi
  • Publication number: 20150140439
    Abstract: A coating liquid according to the present invention comprises polyvinyl alcohol (PVA), boric acid and/or an organometallic compound having the ability of cross-linking PVA, an inorganic filler, a water-soluble compound having a carboxyl group and/or a sulfonic group, and water. According to the present invention, a coating liquid can be obtained which is useful in the preparation of a laminated porous film having suppressed powder fall-off and excellent heat shape stability.
    Type: Application
    Filed: June 17, 2013
    Publication date: May 21, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Hirohiko Hasegawa
  • Publication number: 20150125733
    Abstract: This invention relates to low-cost, electroactive-polymer incorporated fine-fiber composite membranes for use as overcharge and/or overdischarge protection separators in non-aqueous electrochemical cells and the methods for making such membranes.
    Type: Application
    Filed: May 14, 2013
    Publication date: May 7, 2015
    Applicant: The Regents of the University of California
    Inventors: Guoying Chen, Thomas J. Richardson
  • Patent number: 8993646
    Abstract: A porous polymer separator for use in a lithium ion battery is formed by a temperature-induced phase separation method. The porous polymer separator includes a polymer matrix having opposed major faces and a network of pore openings that extends between the major faces and permits intrusion of a lithium-ion conducting electrolyte solution. As part of the temperature-induced phase separation method, a single phase polymer solution that includes a polymer material dissolved in a miscible mixture of a real polymer solvent and a polymer non-solvent is prepared at an elevated temperature above room temperature. A film is then formed from the single phase polymer solution and cooled to phase-separate the polymer material into a solid polymer precipitate. Additional polymer non-solvent is then used to remove the real polymer solvent from the solid polymer precipitate followed by drying.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: March 31, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Xiaosong Huang
  • Patent number: 8986892
    Abstract: A separator includes a non-woven fabric substrate having pores, fine thermoplastic powder located inside the pores of the non-woven fabric substrate, and a porous coating layer disposed on at least one surface of the non-woven fabric substrate. The fine thermoplastic powder has an average diameter smaller than that of the pores and a melting point lower than the melting or decomposition point of the non-woven fabric substrate. The porous coating layer includes a mixture of inorganic particles and a binder polymer whose melting point is higher than the melting or decomposition point of the fine thermoplastic powder. In the porous coating layer, the inorganic particles are fixedly connected to each other by the binder polymer and the pores are formed by interstitial volumes between the inorganic particles. Previous filling of the large pores of the non-woven fabric substrate with the fine thermoplastic powder makes the porous coating layer uniform.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 24, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Su-Jin Yoon, Pil-Kyu Park, Jong-Hun Kim, Jin-Nyoung Yoo, In-Chul Kim, Sang-Young Lee
  • Patent number: 8951677
    Abstract: The present invention relates to microporous membranes comprising polymer and having well-balanced permeability and heat shrinkage, especially heat shrinkage at elevated temperature. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: February 10, 2015
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • Publication number: 20150037654
    Abstract: The invention relates to a perforated polymer film with porosity P from 30% to 50% and with an arrangement of perforations which is characterized by the perforation shape, the ratio of the semiaxes of the perforations, the orientation of the perforations, and the regular arrangement of the perforations, where the longitudinal tensile stress that the polymer film withstands without breaking is greater than that for identical porosity and any other arrangement of perforations which differs in at least one feature.
    Type: Application
    Filed: February 11, 2013
    Publication date: February 5, 2015
    Applicant: Evonik Litarion GmbH
    Inventors: Matthias Pascaly, Michael Kube, Ulrich Boes
  • Publication number: 20150024278
    Abstract: Disclosed is a porous nanoweb including first and second nanofilaments, which facilitates to perform heat resistance simultaneously with a shutdown function for preventing a battery explosion caused by an abnormal heat generation, and to realize small thickness and easy control of porosity, wherein, if the porous nanoweb is used as a battery separator for a secondary battery, it allow the good battery efficiency and good safety owing to the low resistance, the porous nanoweb comprising the first nanofilament having a melting temperature not more than 200° C.; and the second nanofilament having a melting temperature not less than 210° C.
    Type: Application
    Filed: October 10, 2014
    Publication date: January 22, 2015
    Applicant: KOLON INDUSTRIES, INC.
    Inventor: Moo-Seok LEE
  • Publication number: 20150024250
    Abstract: A base material for a lithium ion secondary battery separator provided by the present invention comprises a polyethylene terephthalate fiber, in which an average fiber diameter of the polyethylene terephthalate fiber is 9.0 ?m or less, a specific X-ray diffraction intensity derived from the polyethylene terephthalate fiber is 300 cps/(g/m2) or more, and a coefficient of variation of a specific X-ray diffraction intensity is 12.0% or less, and is excellent in the workability during production and excellent in mechanical strength, uniformity and handling in a subsequent treatment step.
    Type: Application
    Filed: January 25, 2013
    Publication date: January 22, 2015
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Hiroo Kaji, Toshihiro Shigematsu, Nobuaki Hirota, Hiroshi Matsuda
  • Patent number: 8920961
    Abstract: 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: Grant
    Filed: December 20, 2012
    Date of Patent: December 30, 2014
    Assignee: Samsung Total Petrochemicals Co., Ltd.
    Inventors: Dae Ho Park, Do Hoon Lee
  • Patent number: 8906543
    Abstract: A battery including an electrode assembly having a positive electrode, a negative electrode and a separator interposed between the electrodes, a container housing the electrode assembly, a tab attached to a first side of an uncoated region of the electrode assembly, the tab having a terminal, a first insulator interposed between the tab and a first inner surface of the container, and a cap assembly closing the container and having the terminal passing therethrough.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: December 9, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Hyun-Seok Kim
  • Publication number: 20140349195
    Abstract: Provided is a method for producing a propylene-based resin microporous film capable of forming a high-performance lithium ion battery. The method for producing a propylene-based resin microporous film includes an extrusion step of melt-kneading a propylene-based resin in an extruder, and extruding the resin to obtain a propylene-based resin film; a first stretching step of uniaxially stretching the propylene-based resin film at a surface temperature of ?20 to 100° C.; second stretching step of repeating, a plurality of times, a stretching basic step in which the propylene-based resin film after the first stretching step is uniaxially stretched at a surface temperature that is equal to or lower than a temperature lower than the melting point of the propylene-based resin by 10 to 100° C.
    Type: Application
    Filed: September 14, 2012
    Publication date: November 27, 2014
    Inventors: Akihiro Ogawa, Takahiko Sawada, Shotaro Kobaru
  • Publication number: 20140349194
    Abstract: A separator arranged between a pair of electrode sheets includes a nonwoven fabric formed of thermoplastic resin fibers spun by a melt-blowing process. The fibers include fine fibers having fiber diameters of 0.1 ?m or more and 1 ?m or less, and thick fibers having fiber diameters of 8 ?m or more and 30 ?m or less. The fine fibers and the thick fibers are mixed over the entire thickness of the nonwoven fabric.
    Type: Application
    Filed: March 21, 2014
    Publication date: November 27, 2014
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventor: Yuki KUMABUCHI
  • Publication number: 20140342238
    Abstract: Disclosed is a method of manufacturing a porous separator including an elastic material, and a separator manufactured by the method. The separator includes an elastic material being uniformly dispersed in a polymer at a weight ratio of 40:60 to 5:95, and a value of elongation at break in a low tensile strength direction at room temperature is greater than or equal to 250%. In addition, the method of manufacturing a porous separator includes forming an extruded sheet by extruding a mixture of a polymer and an elastic material at a weight ratio of 95:5 to 60:40, forming a film by annealing and stretching the extruded sheet, and forming a porous separator by heat setting the stretched film. Accordingly, a thermal shrinkage ratio of the film is reduced and an elongation at break is greatly increased, to provide a porous separator with improved stability.
    Type: Application
    Filed: August 6, 2014
    Publication date: November 20, 2014
    Inventors: Joo-Sung Lee, Byoung-Jin Shin, Dong-Wook Sung, Jong-Hun Kim
  • Publication number: 20140335423
    Abstract: The present invention provides a propylene-based resin microporous film which has excellent electrolyte solution retention property, and can provide a lithium ion battery in which a decrease in discharge capacity is highly reduced even after repeated charge and discharge. The propylene-based resin microporous film is a propylene-based resin microporous film having micropores, wherein a propylene-based resin having a weight average molecular weight of 250,000 to 500,000, a melting point of 160 to 170° C., and a pentad fraction of 96% or more is contained, the surface aperture ratio is 27 to 42%, the ratio of a surface aperture ratio to a porosity is 0.6 or less, and the degree of gas permeability is 50 to 400 s/100 mL.
    Type: Application
    Filed: December 7, 2012
    Publication date: November 13, 2014
    Inventors: Shotaro Kobaru, Yuki Sakurai
  • Patent number: 8883297
    Abstract: A method for bonding a porous flexible membrane to a rigid material is disclosed. In some embodiments, the method includes applying, at a bonding site of the porous membrane, a pre-treatment solvent solution, drying the bonding site of the porous membrane, applying, at a bonding site of the rigid structure, a first solvent that is capable of dissolving a surface of the rigid material, applying, at the bonding site of the porous membrane, a second solvent that is capable of dissolving the polymeric residue material dissolved in the pre-treatment solvent solution, and pressing the porous membrane to the rigid material at their respective bonding sites. In some embodiments, the pre-treatment solvent solution may include a solvent carrying dissolved polymeric residue material configured to fill the pores of the porous membrane at the bonding site of the porous membrane.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: November 11, 2014
    Assignee: Imergy Power Systems, Inc.
    Inventors: Suresh Kumar Surapalan Nair, Majid Keshavarz, Saroj Kumar Sahu
  • Publication number: 20140329155
    Abstract: An aromatic polyamide porous film has a total number of branch points of pores in an area of 3 cubic micrometers obtained by three-dimensional structural analysis is 2,000 to 20,000, which ensures high rate characteristics and is also capable of suppressing deterioration of cycle characteristics and storage characteristics as well as abnormal heat generation, when used as a separator for battery, and also has excellent heat resistance; and a separator for battery and a battery, each including the aromatic polyamide porous film.
    Type: Application
    Filed: September 4, 2012
    Publication date: November 6, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Atsushi Sawamoto, Kenta Nishibara, Akimitsu Tsukuda
  • Publication number: 20140329154
    Abstract: The present invention provides a coating liquid, a laminated porous film and a method for producing a laminated porous film. The coating liquid comprises a binder resin, a filler and a medium, wherein the filler is a mixture comprising (a) a filler having a specific surface area of not less than 7 m2/g and not more than 80 m2/g and (b) a filler having a specific surface area of not less than 3 m2/g and not more than 6 m2/g in a filler (a) to filler (b) weight ratio of from 5:95 to 40:60. The laminated porous film is a laminated porous film in which a heat-resistant layer is laminated on one or both of the surfaces of a porous film substrate, wherein the heat-resistant layer is a heat-resistant layer formed by removing the medium from the coating liquid.
    Type: Application
    Filed: August 23, 2012
    Publication date: November 6, 2014
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroshi Shinoda, Hirohiko Hasegawa
  • Patent number: 8871406
    Abstract: A highly proton conductive polymer electrolyte composite membrane for a fuel cell is provided. The composite membrane includes crosslinked polyvinylsulfonic acid. The composite membrane is produced by impregnating a mixed solution of vinylsulfonic acid as a monomer, a hydroxyl group-containing bisacrylamide as a crosslinking agent and a photoinitiator or thermal initiator into a microporous polymer support, polymerizing the monomer, and simultaneously thermal-crosslinking or photo-crosslinking the polymer to form a chemically crosslinked polymer electrolyte membrane which is also physically crosslinked with the porous support. Further provided is a method for producing the composite membrane in a simple manner at low cost as well as a fuel cell using the composite membrane.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: October 28, 2014
    Assignee: Korea Institute of Energy Research
    Inventors: Young Woo Choi, Chang Soo Kim, Gu Gon Park, Seok Hee Park, Sung Dae Lim, Tae Hyun Yang, Young Gi Yoon, Min Jin Kim, Kyoung Youn Kim, Young Jun Sohn, Won Yong Lee, Mi-Soon Lee
  • Patent number: 8859142
    Abstract: A non-aqueous electrolyte secondary battery comprising electrodes including a positive electrode and a negative electrode, a separator positioned between the electrodes, and a non-aqueous electrolyte, wherein the electrodes have a collector carrying an active substance material, and the collector of at least one of the positive electrode and the negative electrode is a three-dimensional structure formed of a resin fiber covered with a metal film.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: October 14, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takahiro Matsuyama, Satoshi Okano, Naoto Nishimura
  • Publication number: 20140287323
    Abstract: The invention relates to a membrane comprising a poly(dialkylene ester) thermoplastic polyurethane composition. The invention also provides an electrochemical cell comprising a positive electrode, a negative electrode, and (I) a separator membrane disposed between said positive and negative electrodes, wherein the said membrane comprises (A) the described poly(dialkylene ester) thermoplastic polyurethane composition.
    Type: Application
    Filed: October 24, 2012
    Publication date: September 25, 2014
    Inventors: Qiwei Lu, Feina Cao, Tesham Gor, Jian Xie, Yadong Liu, Yona Eckstein
  • Publication number: 20140287322
    Abstract: A microporous membrane is made by a dry-stretch process and has substantially round shaped pores and a ratio of machine direction tensile strength to transverse direction tensile strength in the range of 0.5 to 5.0. The method of making the foregoing microporous membrane includes the steps of: extruding a polymer into a nonporous precursor, and biaxially stretching the nonporous precursor, the biaxial stretching including a machine direction stretching and a transverse direction stretching, the transverse direction stretching including a simultaneous controlled machine direction relax.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Inventors: Xiangyun Wei, Charles Haire
  • Patent number: 8841031
    Abstract: Disclosed is a porous film comprising: (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. An electrochemical device using the porous film as a separator is also disclosed. The porous film is coated with a styrene-butadiene polymer, whose rubbery characteristics can be controlled, and thus provides improved scratch resistance and adhesion to other substrates. When the porous film is used as a separator for an electrochemical device, it is possible to improve the safety of the electrochemical device and to prevent degradation in the quality of the electrochemical device.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: September 23, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Seok Koo Kim, Sang Young Lee, Soon Ho Ahn, Jung Don Suk, Hyun Hang Yong
  • Patent number: 8841032
    Abstract: The invention relates to microporous membranes having high meltdown temperature, low shutdown temperature, and resistance to heat shrinkage at elevated temperature. The membranes can be produced by stretching a sheet comprising polymethylpentene, polyethylene, and diluent, and then removing the diluent. The membranes can be used as battery separator film in, e.g., lithium ion batteries.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 23, 2014
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka
  • Patent number: 8835059
    Abstract: A lithium rechargeable battery, which includes a separator having excellent mechanical strength such as elastic strength, swelling resistance, heat resistance, and peel strength. The lithium rechargeable battery includes a cathode, an anode, a separator for separating both electrodes from each other, and a non-aqueous electrolyte, wherein the separator includes a porous membrane formed of a ceramic material and a binder, and the binder has an elongation ratio of 200 to 300%.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: September 16, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Hee Kim, Won-Chull Han, Jae-Yun Min
  • Patent number: 8822083
    Abstract: A negative electrode for a lithium-ion secondary battery, has a current collector and an active-material layer bound on a surface of the current collector. The active-material layer includes active materials, binders, conductive additives, and buffer materials. The active materials include Si and/or Sn, and the buffer materials comprise a silicone composite powder in which a spherical silicone-rubber powder is covered with a silicone resin.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: September 2, 2014
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Manabu Miyoshi, Hitotoshi Murase, Keiichi Hayashi, Shinji Suzuki
  • Patent number: 8815384
    Abstract: A porous film includes aromatic polyamide as a constituent component that has high heat resistance, high air permeability and high affinity to electrolytes. It is a porous aromatic polyamide film including aromatic polyamide and a hydrophilic polymer, wherein the hydrophilic polymer accounts for 12 to 50 parts by mass per 100 parts by mass of the aromatic polyamide, the thickness being 2 to 30 micrometers, the Gurley air permeability being 0.5 to 300 seconds/100 ml, and the thermal shrinkage rate being ?0.5 to 1.0% at 200° C.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: August 26, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Atsushi Sawamoto, Kenta Nishibara, Akimitsu Tsukuda
  • Publication number: 20140227605
    Abstract: The present invention provides a production method and the like of a microporous stretched film having a high puncture strength and the like. The method includes: a first step of melt-kneading a cellulose nanofiber and a polyolefin resin to thereby disperse the nanofiber in the resin; a second step of removing water from a kneaded mixture obtained in the first step; a third step of mixing a plasticizer in the nanofiber and the resin and melt-kneading them to prepare a polyolefin resin composition; a fourth step of extrusion-molding the polyolefin resin composition; a fifth step of stretching an extrusion-molded article obtained in the fourth step to form a film; and a sixth step of extracting the plasticizer from the film.
    Type: Application
    Filed: September 6, 2012
    Publication date: August 14, 2014
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Satoru Nakamura, Yoshiyuki Kushizaki, Ryou Ishiguro, Mariko Yoshioka
  • Publication number: 20140227604
    Abstract: The present invention relates to an apparatus and method for manufacturing a fine porous film to be used as a separation film of a secondary battery. The apparatus for manufacturing the fine porous film of the present invention includes: a T-shaped die (20) for molding a precursor film by extruding a molten resin generated by melting a partially crystalline resin through the front end of a nozzle; a guide roller (50) arranged at a downstream side of the extrusion direction of the T-shaped die (20) so as to move and guide the precursor film (F1) at a predetermined draft ratio; a precursor film cooling unit (40) for providing, in the moving direction of the precursor film, a flow of cooling air over either or both of the front and back surfaces of the precursor film so as to cool the precursor film; and a film stretching unit for applying a tensile force, in an axial direction or in biaxial directions, to the cooled film while same is passing through the precursor film cooling means (40).
    Type: Application
    Filed: June 8, 2012
    Publication date: August 14, 2014
    Applicant: E-Cell Tech. Inc.
    Inventor: Hyun Chae Park
  • Patent number: 8801984
    Abstract: The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: August 12, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, Inhwa Jung, Gwigwon Kang, Youngkeun Lee
  • Patent number: 8790828
    Abstract: A primary electrochemical cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The cell is balanced so that the anode is in theoretical capacity excess (mAmp-hrs) compared to the theoretical capacity of the cathode. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added. The electrolyte comprises a lithium salt dissolved in organic solvent.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: July 29, 2014
    Assignee: The Gillette Company
    Inventors: Steven Jeffrey Specht, Michael Pozin, Yelena Valentinovna Kouznetsova, Bhupendra Kanchanial Patel, Fred Joseph Berkowitz
  • Patent number: 8771859
    Abstract: A separator for batteries according to the present invention includes a multilayer porous film having a resin porous film containing a thermoplastic resin as a main component and a heat resistant porous layer containing heat resistant particles as a main component, and the heat resistant porous layer has a thickness of 1 to 15 ?m, and the 180° peel strength between the resin porous film and the heat resistant porous layer is 0.6 N/cm or more.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: July 8, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Nobuaki Matsumoto, Hideaki Katayama, Yoshinori Sato
  • Patent number: 8758926
    Abstract: Provided is a separator for an electrochemical device 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. The crosslinked polyester coating layer hardly affects the air permeability of the separator. Also, the crosslinked polyester coating layer has good hydrophilicity and wettability to an electrolyte, and thus improves the performance of the battery. Also, the crosslinked polyester coating layer has excellent resistance to heat and deformation, and thus prevents the thermal shrinkage of the separator.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: June 24, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Jeong-Man Son, Yoon-Jung Bae
  • Publication number: 20140134498
    Abstract: A separator medium for electrochemical cells that contains at least one nonwoven sheet of polymeric fibers. The nonwoven sheet has a surface area of about 0.5 to about 1.5 m2/g and has a maximum pore size that is equal to or more than 2.5 times the mean flow pore size and more than 11 times the minimum pore size. The sheet may be sulfonated to a level of 0.67% and demonstrates superior tensile properties after sulfonation and relative to previously known separators.
    Type: Application
    Filed: November 13, 2013
    Publication date: May 15, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: HYUN SUNG LIM, PANKAJ ARORA
  • Patent number: 8715862
    Abstract: A lithium secondary battery includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a separator separating the positive electrode from the negative electrode, and an electrolyte. The negative electrode active material includes a graphite core particle, at least one metal particle located on the graphite core particle, and a polymer film coating the graphite core particle and the at least one metal particle. The polymer includes a polyimide- or polyacrylate-based polymer.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: May 6, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Cheol-Hee Hwang, Bong-Chull Kim, Jong-Chan Kim, Se-Ho Park, Na-Rae Won
  • Patent number: 8715849
    Abstract: 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: Grant
    Filed: October 5, 2007
    Date of Patent: May 6, 2014
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Kotaro Takita, Shintaro Kikuchi
  • Publication number: 20140120426
    Abstract: The present invention pertains to a secondary battery comprising at least one separator, said separator comprising at least one fluorinated polymer [polymer (F)], said polymer (F) comprising recurring units derived from vinylidene fluoride (VDF), hexafluoropropylene (HFP) and at least one (meth)acrylic monomer (MA) having formula (I) here below, wherein: —R1, R2 and R3, equal to or different from each other, are independently selected from a hydrogen atom and a C1-C3 hydrocarbon group, and —ROH is a C1-C5 hydrocarbon moiety comprising at least one hydroxyl group.
    Type: Application
    Filed: June 15, 2012
    Publication date: May 1, 2014
    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Julio A. Abusleme, Regis Faig, Riccardo Pieri