Patents by Inventor Su Rim Lee
Su Rim Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9893393Abstract: The present disclosure provides a method for removing gases generated in a lithium secondary battery using a cathode active material of the following formula (I) Li(LixMy?y?M?y?)O2?zAz??(I) wherein, x, y, y?, and z satisfy 0<x<0.5, 0.6<y?<1.1, 0?y?<0.2, and 0?z<0.2, M is any one selected from the group consisting of Mn, Ni, Co, Fe, Cr, V, Cu, Zn, and Ti, M? is any one selected from the group consisting of Al, Mg and B; and A is any one selected from the group consisting of F, S and N by carrying out two or more degassing steps under the conditions of above and below a voltage that the structural variation of the cathode active material occurs, thereby inducing a uniform initial reaction in a cathode and an anode to enhance the life time of the battery.Type: GrantFiled: October 17, 2014Date of Patent: February 13, 2018Assignee: LG Chem, Ltd.Inventors: Su-Rim Lee, Song-Taek Oh, Jung-Seok Choi, Hyeok-Moo Lee, Ji-Hye Park
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Patent number: 9786891Abstract: An electrode assembly, comprises one or more first electrodes comprising a cathode; one or more second electrodes comprising an anode; and a separator sheet having a zigzag form interposed therebetween. The separator sheet comprises a first porous polymer substrate; a first coating layer formed on one surface of the first porous polymer substrate and comprising a polymer binder, the first coating layer being faced with the cathode; and a second coating layer formed on the other surface of the first porous polymer substrate and comprising a mixture a polymer binder and inorganic particles, the second coating layer being faced with the anode and having a composition, a thickness and a porosity different from those of the first porous coating layer. A separator has porous coating layers with a different composition, thickness or porosity formed on each surface thereof.Type: GrantFiled: October 31, 2014Date of Patent: October 10, 2017Assignee: LG Chem, Ltd.Inventors: Jung-Seok Choi, Song-Taek Oh, Su-Rim Lee, Hyeok-Moo Lee, Ji-Hye Park
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Patent number: 9761864Abstract: Disclosed are a cathode active material for high voltage lithium secondary batteries and a lithium secondary battery including the same and, more particularly, the present invention relates to a cathode active material for lithium secondary batteries that includes a lithium transition metal oxide having a lithium molar fraction of greater than 1, containing a relative excess of nickel, and having a composition represented by Formula 1 below, wherein the lithium transition metal oxide has a Li2MnO3-like structure phase: Li1+aNibCocMn1?(a+b+c+d)MdO2-tAt??(1) wherein 0.05?a?0.2, 0.4?b?0.7, 0.1?c?0.4, 0?d?0.1, and 0?t<0.2; M is at least one divalent or trivalent metal; and A is at least one monovalent or divalent anion.Type: GrantFiled: September 24, 2014Date of Patent: September 12, 2017Assignee: LG Chem, Ltd.Inventors: Hyeokmoo Lee, Jae Hyun Lee, Su Rim Lee, Song Taek Oh, JungSeok Choi, Ji Hye Park
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Patent number: 9692053Abstract: Provided are a mixed cathode active material having improved power characteristics and safety, and a lithium secondary battery including the same. More particularly, the present invention relates to a mixed cathode active material which may assist power in a low SOC range to widen an available state of charge (SOC) range and may simultaneously provide improved safety by blending substituted LFP, in which operating voltage is adjusted by substituting a portion of iron (Fe) with other elements such as titanium (Ti), in order to prevent a rapid increase in resistance of manganese (Mn)-rich having high capacity but low operating voltage in a low SOC range (e.g., a SOC range of 10% to 40%), and a lithium secondary battery including the mixed cathode active material.Type: GrantFiled: June 18, 2014Date of Patent: June 27, 2017Assignee: LG Chem, Ltd.Inventors: Song Taek Oh, Sang Uck Lee, Su Rim Lee, Geun Chang Chung, Jae Kook Kim, Jin Sub Lim
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Patent number: 9595710Abstract: Disclosed are a cathode active material for lithium secondary batteries and a lithium secondary battery including the same and, more particularly, the present invention relates to a cathode active material for lithium secondary batteries that includes a mixture of an overlithiated transition metal oxide represented by Formula 1 below and a lithium composite transition metal oxide represented by Formula 2 below: Li1+aNibMncCo1-(a+b+c+d)MdO2-sAs??(1) LiNixMnyCo1-(x+y+z)M?zO2-tA?t??(2) wherein 0.1?a?0.2, 0.1?b?0.4, 0.3?c?0.7, 0?d?0.1, 0.5?x?0.8, 0.1?y?0.4, 0?z?0.1, 0?s<0.2, and 0?t<0.2; M and M? are each independently at least one divalent or trivalent metal; and A and A? are each independently at least one monovalent or divalent anion.Type: GrantFiled: September 24, 2014Date of Patent: March 14, 2017Assignee: LG Chem, Ltd.Inventors: Hyeokmoo Lee, Song Taek Oh, Su Rim Lee, JungSeok Choi, Ji Hye Park
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Patent number: 9484593Abstract: The present disclosure provides a stack-folding type electrode assembly in which a plurality of full cells or bicells as unit cells is stacked on top of each other and surrounded by a second separator, each cell including a positive electrode, a negative electrode, and a first separator interposed between the positive electrode and the negative electrode, wherein a first binder is coated on at least a partial surface of the first separator, a second binder is coated on at least a partial surface of the second separator, and a content of the second binder is higher than a content of the first binder, to inhibit a loose phenomenon inside a battery, make the battery less prone to expansion, and have deformation resistance to an external impact.Type: GrantFiled: October 31, 2014Date of Patent: November 1, 2016Assignee: LG CHEM, LTD.Inventors: Ji-Hye Park, Jae-Hyun Lee, Su-Rim Lee, Song-Taek Oh, Jung-Seok Choi, Hyeok-Moo Lee
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Patent number: 9455433Abstract: The present disclosure provides an electrode assembly comprising a plurality of unit cells, each unit cell having a full-cell or a bi-cell structure comprising a cathode, an anode, and a first separator interposed between the cathode and the anode, and the plurality of unit cells being stacked by surrounding each unit cell with a second separator, wherein the second separator has an average pore diameter (d2) larger than the average pore diameter (d1) of the first separator in the unit cells.Type: GrantFiled: October 31, 2014Date of Patent: September 27, 2016Assignee: LG Chem, Ltd.Inventors: Ji-Hye Park, Song-Taek Oh, Su-Rim Lee, Jung-Seok Choi, Hyeok-Moo Lee
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Publication number: 20160028064Abstract: An electrode assembly, comprises one or more first electrodes comprising a cathode; one or more second electrodes comprising an anode; and a separator sheet having a zigzag form interposed therebetween. The separator sheet comprises a first porous polymer substrate; a first coating layer formed on one surface of the first porous polymer substrate and comprising a polymer binder, the first coating layer being faced with the cathode; and a second coating layer formed on the other surface of the first porous polymer substrate and comprising a mixture a polymer binder and inorganic particles, the second coating layer being faced with the anode and having a composition, a thickness and a porosity different from those of the first porous coating layer. A separator has porous coating layers with a different composition, thickness or porosity formed on each surface thereof.Type: ApplicationFiled: October 31, 2014Publication date: January 28, 2016Applicant: LG Chem, Ltd.Inventors: Jung-Seok Choi, Song-Taek Oh, Su-Rim Lee, Hyeok-Moo Lee, Ji-Hye Park
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Publication number: 20160028065Abstract: The present disclosure provides an electrode assembly comprising a plurality of unit cells, each unit cell having a full-cell or a bi-cell structure comprising a cathode, an anode, and a first separator interposed between the cathode and the anode, and the plurality of unit cells being stacked by surrounding each unit cell with a second separator, wherein the second separator has an average pore diameter (d2) larger than the average pore diameter (d1) of the first separator in the unit cells.Type: ApplicationFiled: October 31, 2014Publication date: January 28, 2016Applicant: LG Chem, Ltd.Inventors: Ji-Hye Park, Song-Taek Oh, Su-Rim Lee, Jung-Seok Choi, Hyeok-Moo Lee
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Publication number: 20150364760Abstract: The present disclosure relates to a positive electrode for a lithium secondary battery including an electrode current collector, and a positive electrode active material layer coated on at least a part of the electrode current collector, wherein the positive electrode active material layer includes a manganese-based positive electrode active material, and a porosity is from 30% to 35%, to improve high-temperature storage characteristics and high-temperature cycle characteristics.Type: ApplicationFiled: October 31, 2014Publication date: December 17, 2015Applicant: LG CHEM, LTD.Inventors: Ji-Hye PARK, Jae-Hyun LEE, Su-Rim LEE, Song-Taek OH, Jung-Seok CHOI, Hyeok-Moo LEE
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Publication number: 20150357671Abstract: The present disclosure provides a stack-folding type electrode assembly in which a plurality of full cells or bicells as unit cells is stacked on top of each other and surrounded by a second separator, each cell including a positive electrode, a negative electrode, and a first separator interposed between the positive electrode and the negative electrode, wherein a first binder is coated on at least a partial surface of the first separator, a second binder is coated on at least a partial surface of the second separator, and a content of the second binder is higher than a content of the first binder, to inhibit a loose phenomenon inside a battery, make the battery less prone to expansion, and have deformation resistance to an external impact.Type: ApplicationFiled: October 31, 2014Publication date: December 10, 2015Applicant: LG CHEM, LTD.Inventors: Ji-Hye PARK, Jae-Hyun LEE, Su-Rim LEE, Song-Taek OH, Jung-Seok CHOI, Hyeok-Moo LEE
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Publication number: 20150118524Abstract: The present disclosure provides a method for removing gases generated in a lithium secondary battery using a cathode active material of the following formula (I) Li(LixMy-y?M?y?)O2-zAz??(I) wherein, x, y, y?, and z satisfy 0<x<0.5, 0.6<y<1.1, 0?y?<0.2, and 0?z<0.2, M is any one selected from the group consisting of Mn, Ni, Co, Fe, Cr, V, Cu, Zn, and Ti, M? is any one selected from the group consisting of Al, Mg and B; and A is any one selected from the group consisting of F, S and N by carrying out two or more degassing steps under the conditions of above and below a voltage that the structural variation of the cathode active material occurs, thereby inducing a uniform initial reaction in a cathode and an anode to enhance the life time of the battery.Type: ApplicationFiled: October 17, 2014Publication date: April 30, 2015Applicant: LG CHEM, LTD.Inventors: Su-Rim Lee, Song-Taek Oh, Jung-Seok Choi, Hyeok-Moo Lee, Ji-Hye Park
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Publication number: 20150118542Abstract: The present disclosure provides a method for preparing a lithium secondary battery by bringing a first cell using a first cathode active material of formula (I) Li(LixMy-y?M?y?)O2-zAz??(I) wherein, x, y, y?, and z satisfy 0<x<0.5, 0.6<y<1.1, 0?y?<0.2, and 0?z<0.2, M is any one selected from the group consisting of Mn, Ni, Co, Fe, Cr, V, Cu, Zn, and Ti, M? is any one selected from the group consisting of Al, Mg and B; and A is any one selected from the group consisting of F, S and N and a second cell using a second cathode active material being generally used into activation under different voltage conditions, and then electrically connecting the first cell and the second cell in the step of assembling unit cells; and a lithium secondary battery prepared from the method.Type: ApplicationFiled: October 17, 2014Publication date: April 30, 2015Applicant: LG Chem, Ltd.Inventors: Su Rim Lee, Song-Taek Oh, Jung-Seok Choi, Hyeok-Moo Lee, Ji-Hye Park
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Publication number: 20150090924Abstract: Disclosed are a cathode active material for lithium secondary batteries and a lithium secondary battery including the same and, more particularly, the present invention relates to a cathode active material for lithium secondary batteries that includes a mixture of an overlithiated transition metal oxide represented by Formula 1 below and a lithium composite transition metal oxide represented by Formula 2 below: Li1+aNibMncCo1-(a+b+c+d)MdO2-sAs??(1) LiNixMnyCo1-(x+y+z)M?zO2-tA?t??(2) wherein 0.1?a?0.2, 0.1?b?0.4, 0.3?c?0.7, 0?d?0.1, 0.5?x?0.8, 0.1?y?0.4, 0?z?0.1, 0?s?0.2, and 0?t?0.2; M and M? are each independently at least one divalent or trivalent metal; and A and A? are each independently at least one monovalent or divalent anion.Type: ApplicationFiled: September 24, 2014Publication date: April 2, 2015Applicant: LG Chem, Ltd.Inventors: Hyeokmoo Lee, Song Taek Oh, Su Rim Lee, JungSeok Choi, Ji Hye Park
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Publication number: 20150090925Abstract: Disclosed are a cathode active material for high voltage lithium secondary batteries and a lithium secondary battery including the same and, more particularly, the present invention relates to a cathode active material for lithium secondary batteries that includes a lithium transition metal oxide having a lithium molar fraction of greater than 1, containing a relative excess of nickel, and having a composition represented by Formula 1 below, wherein the lithium transition metal oxide has a Li2MnO3-like structure phase: Li1+aNibCocMn1?(a+b+c+d)MdO2-tAt ??(1) wherein 0.05?a?0.2, 0.4?b?0.7, 0.1?c?0.4, 0?d?0.1, and 0?t<0.2; M is at least one divalent or trivalent metal; and A is at least one monovalent or divalent anion.Type: ApplicationFiled: September 24, 2014Publication date: April 2, 2015Applicant: LG Chem, Ltd.Inventors: Hyeokmoo Lee, Jae Hyun Lee, Su Rim Lee, Song Taek Oh, JungSeok Choi, Ji Hye Park
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Publication number: 20140291588Abstract: Provided are a mixed cathode active material having improved power characteristics and safety, and a lithium secondary battery including the same. More particularly, the present invention relates to a mixed cathode active material which may assist power in a low SOC range to widen an available state of charge (SOC) range and may simultaneously provide improved safety by blending substituted LFP, in which operating voltage is adjusted by substituting a portion of iron (Fe) with other elements such as titanium (Ti), in order to prevent a rapid increase in resistance of manganese (Mn)-rich having high capacity but low operating voltage in a low SOC range (e.g., a SOC range of 10% to 40%), and a lithium secondary battery including the mixed cathode active material.Type: ApplicationFiled: June 18, 2014Publication date: October 2, 2014Inventors: Song Taek Oh, Sang Uck Lee, Su Rim Lee, Geun Chang Chung, Jae Kook Kim, Jin Sub Lim
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Patent number: 8754852Abstract: Disclosed are a light guide plate for a non-contact type coordinate input system, a system including the same, and a non-contact type coordinate input method using the same. More particularly, the present invention relates to a light guide plate for a non-contact type coordinate input system, which eliminates inconvenience of a conventional contact-type coordinate input system inputting coordinates through direct contact, and which can reduce use of sensors and optical loss as much as possible. The present invention also relates to a system including the same, and a non-contact type coordinate input method using the same.Type: GrantFiled: August 10, 2007Date of Patent: June 17, 2014Assignee: LG Chem, Ltd.Inventors: Yeon-Keun Lee, Sang-Hyun Park, Hyun-Seok Choi, Jung-Doo Kim, Su-Rim Lee
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Patent number: 8004763Abstract: Disclosed herein is a PDP filter having a laminated structure of a transparent conductive film type electromagnetic wave-shielding layer and one or more other functional layers, in which at least two edge portions of the surface of the transparent conductive film type electromagnetic wave-shielding layer, which is in contact with the functional layer, are not exposed outside the laminated structure of the PDP filter.Type: GrantFiled: March 3, 2006Date of Patent: August 23, 2011Assignee: LG Chem, Ltd.Inventors: Dong-Wook Lee, Yeon-Keun Lee, In-Seok Hwang, Seung-Wook Kim, Sang-Hyun Park, Jung-Doo Kim, Hyun-Seok Choi, Su-Rim Lee
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Publication number: 20100285293Abstract: The present invention relates to a multifunctional adhesive film that has at least one of a near IR absorption dye and/a color correction dye and a UV stabilizer, a plasma display panel filter including the same and a plasma display panel including the same. Since the multifunctional adhesive film does not require a layer that has a separate UV blocking function, it is possible to manufacture a thin type optical filter, and it is possible to improve the productivity and lower a cost by simplifying a process by an epoch-making structure simplification.Type: ApplicationFiled: January 8, 2009Publication date: November 11, 2010Inventors: Su-Rim Lee, Sang-Hyun Park, Jung-Doo Kim
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Patent number: 7709751Abstract: Disclosed is a method for making a film assembly used in a PDP filter positioned on the front surface of a PDP, a film assembly manufactured by the method, and a PDP filter using the film assembly. The method includes providing a roll of an EMI film formed on a surface of a long transparent polymer resin film with a predetermined spacing and mounting the wound roll of the EMI film on a first feed roller; providing a roll of at least one long transparent functional film capable of covering at least partially the effective screen portions of the EMI film and mounting the wound roll of the functional film on a second feed roller which is spaced a predetermined distance from the first feed roller; and integrating the EMI film with the functional film by feeding them into a gap between the first and second compression rollers.Type: GrantFiled: December 9, 2004Date of Patent: May 4, 2010Assignee: LG Chem, Ltd.Inventors: Dong-Wook Lee, In Seok Hwang, Yeon Keun Lee, Sang Hyun Park, Jung Doo Kim, Hyun Seok Choi, Su Rim Lee