Patents by Inventor Chan-Jong KIM
Chan-Jong KIM 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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Publication number: 20220384910Abstract: Disclosed is a separator including inorganic particles and a binder resin. The separator may be used as a free standing type separator including no separator substrate, such as a polymer resin film, and thus causes no problem of heat shrinking. In addition, the separator includes an elastomer to provide a small change in dimension and high elongation, and thus is prevented from being damaged by external impact.Type: ApplicationFiled: October 16, 2020Publication date: December 1, 2022Applicant: LG Energy Solution, Ltd.Inventors: Min-Ji Kim, So-Mi Jeong, Chan-Jong Kim, Da-Kyung Han
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Patent number: 11495866Abstract: A separator is provided which includes: a separator base including a porous polymer substrate having a plurality of pores, and a porous coating layer positioned on at least one surface of the porous polymer substrate and containing a plurality of inorganic particles and a binder polymer positioned on the whole or a part of the surface of the inorganic particles to connect the inorganic particles with one another and fix them; and a porous adhesive layer positioned on at least one surface of the separator base and including polyvinylidene fluoride-co-hexafluoropropylene containing vinylidene fluoride-derived repeating units and hexafluoropropylene-derived repeating units, wherein the ratio of the number of the hexafluoropropylene (HFP)-derived repeating units (HFP substitution ratio) based on the total number of the vinylidene fluoride-derived repeating units and the hexafluoropropylene-derived repeating units is 4.5% to 9%. An electrochemical device including the separator is also provided.Type: GrantFiled: July 26, 2019Date of Patent: November 8, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: Chan-Jong Kim, Su-Jin Yoon
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Publication number: 20220294078Abstract: The separator according to the present disclosure and the electrochemical device including the same show low internal resistance between the separator and an electrode. The separator includes heat resistant particles in a heat resistant coating layer. The heat resistant particles include a particle-shaped inorganic material and fluorine (F) doped to a surface of the inorganic particles. When the internal temperature of a battery is increased during the operation of the battery, the separator shows improved heat resistance by virtue of an endothermic effect derived from a phase change of the heat resistant particles. In addition, decomposition of a lithium salt used as an ingredient of electrolyte is inhibited by the fluorine atoms introduced to the heat resistant particles, resulting in improvement of ion conductivity and resistance characteristics.Type: ApplicationFiled: August 14, 2020Publication date: September 15, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Chan-Jong KIM, So-Mi JEONG
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Patent number: 11424511Abstract: Disclosed is an electrode assembly including two electrodes having polarities opposite to each other, and a separator interposed between the two electrodes, wherein the separator includes: a separator base which includes a porous polymer substrate having a plurality of pores, and a porous coating layer; and an adhesive layer formed on at least one surface of the separator base, provided to face either of the electrodes and containing an adhesive resin, and wherein the adhesion (Peel Strength) between the porous polymer substrate and the porous coating layer and the adhesion (Lami Strength) between the adhesive layer and the electrode satisfy Mathematical Formula 1. An electrochemical device including the separator is also disclosed. In the electrode assembly, the separator shows increased resistance against scratching and the adhesion between the separator and the electrode can be improved.Type: GrantFiled: October 18, 2018Date of Patent: August 23, 2022Assignee: LG Energy Solution, Ltd.Inventors: Chan-Jong Kim, Myeong-Soo Kim, In-Hyouk Sung, Su-Jin Yoon, Sang-Joon Lee
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Publication number: 20220247034Abstract: Disclosed are a method for manufacturing a separator and a separator obtained thereby. The method includes forming a porous coating layer by using slurry for forming a porous coating layer including inorganic particles, lithium halide and a polyvinylidene fluoride-based binder polymer. It is possible to provide a separator showing reduced resistance and an electrochemical device including the same by modifying the properties of the binder polymer.Type: ApplicationFiled: June 11, 2020Publication date: August 4, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: So-Mi JEONG, Min-Ji KIM, Chan-Jong KIM, Da-Kyung HAN
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Patent number: 11258135Abstract: A functional binder and a separator including the functional binder, in which the separator includes a porous polyolefin substrate and an organic-inorganic hybrid porous coating layer formed on at least one surface of the substrate and configured to include a mixture of inorganic particles and a binder compound, thus increasing binder-inorganic material adhesion and substrate-binder adhesion while preventing internal shorting from occurring by performing self-healing of damage to the separator, enhancing the adhesion of the separator to a cathode and an anode, and withstanding the dissolution of a transition metal of a cathode material. The binder contains 10 wt % or more of a hydroxyl group per molecule thereof.Type: GrantFiled: January 5, 2018Date of Patent: February 22, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: Kwan Woo Nam, Su Jin Yoon, Hye Jin Kwon, Chan Jong Kim, Je An Lee
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Patent number: 10978766Abstract: The present disclosure relates to a separator for an electrochemical device. The separator includes a porous coating layer containing inorganic particles on the surface of a porous polymer substrate, wherein the porous coating layer includes plate-like inorganic particles and spherical inorganic particles as inorganic particles, and shows a step-wise or successive increase in content of inorganic particles a) from the bottom close to the porous polymer substrate to the top, when viewed from the thickness direction of the porous coating layer, and shows a step-wise or successive decrease in content of inorganic particles b) from the bottom close to the porous polymer substrate to the top, when viewed from the thickness direction of the porous coating layer.Type: GrantFiled: August 28, 2017Date of Patent: April 13, 2021Assignee: LG CHEM, LTD.Inventors: Chan-Jong Kim, Su-Jin Yoon
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Publication number: 20210050575Abstract: A separator for an electrochemical device. The separator includes a porous substrate made of a porous polymer film having an excellent compressibility and permanent strain. The porous substrate has excellent physical strength and durability, and ensures a high breakdown voltage while using a heat resistant layer having a small thickness, and thus shows a low possibility of short-circuit generation. In addition, the separator may further include a heat resistant layer including inorganic particles, on the surface of the porous substrate. It is possible to further improve the compressibility, maximum compressibility and permanent strain characteristics depending on the types of inorganic particles.Type: ApplicationFiled: June 21, 2019Publication date: February 18, 2021Applicant: LG CHEM, LTD.Inventors: Su-Jin PARK, Chan-Jong KIM, Sang-Joon LEE
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Patent number: 10804519Abstract: Disclosed are a separator and an electrochemical device including the same.Type: GrantFiled: August 9, 2017Date of Patent: October 13, 2020Assignee: LG CHEM, LTD.Inventors: Su-Jin Yoon, Hye-Jin Kwon, Min-Ji Kim, Chan-Jong Kim, Kwan-Woo Nam
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Publication number: 20200321587Abstract: A separator is provided which includes: a separator base including a porous polymer substrate having a plurality of pores, and a porous coating layer positioned on at least one surface of the porous polymer substrate and containing a plurality of inorganic particles and a binder polymer positioned on the whole or a part of the surface of the inorganic particles to connect the inorganic particles with one another and fix them; and a porous adhesive layer positioned on at least one surface of the separator base and including polyvinylidene fluoride-co-hexafluoropropylene containing vinylidene fluoride-derived repeating units and hexafluoropropylene-derived repeating units, wherein the ratio of the number of the hexafluoropropylene (HFP)-derived repeating units (HFP substitution ratio) based on the total number of the vinylidene fluoride-derived repeating units and the hexafluoropropylene-derived repeating units is 4.5% to 9%. An electrochemical device including the separator is also provided.Type: ApplicationFiled: July 26, 2019Publication date: October 8, 2020Applicant: LG CHEM, LTD.Inventors: Chan-Jong KIM, Su-Jin YOON
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Publication number: 20190355953Abstract: A functional binder and a separator including the functional binder, in which the separator includes a porous polyolefin substrate and an organic-inorganic hybrid porous coating layer formed on at least one surface of the substrate and configured to include a mixture of inorganic particles and a binder compound, thus increasing binder-inorganic material adhesion and substrate-binder adhesion while preventing internal shorting from occurring by performing self-healing of damage to the separator, enhancing the adhesion of the separator to a cathode and an anode, and withstanding the dissolution of a transition metal of a cathode material. The binder contains 10 wt % or more of a hydroxyl group per molecule thereof.Type: ApplicationFiled: January 5, 2018Publication date: November 21, 2019Applicant: LG CHEM, LTD.Inventors: Kwan Woo NAM, Su Jin YOON, Hye Jin KWON, Chan Jong KIM, Je An LEE
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Publication number: 20190348655Abstract: Disclosed is an electrode assembly including two electrodes having polarities opposite to each other, and a separator interposed between the two electrodes, wherein the separator includes: a separator base which includes a porous polymer substrate having a plurality of pores, and a porous coating layer; and an adhesive layer formed on at least one surface of the separator base, provided to face either of the electrodes and containing an adhesive resin, and wherein the adhesion (Peel Strength) between the porous polymer substrate and the porous coating layer and the adhesion (Lami Strength) between the adhesive layer and the electrode satisfy Mathematical Formula 1. An electrochemical device including the separator is also disclosed. In the electrode assembly, the separator shows increased resistance against scratching and the adhesion between the separator and the electrode can be improved.Type: ApplicationFiled: October 18, 2018Publication date: November 14, 2019Applicant: LG CHEM, LTD.Inventors: Chan-Jong KIM, Myeong-Soo KIM, In-Hyouk SUNG, Su-Jin YOON, Sang-Joon LEE
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Publication number: 20190131604Abstract: Disclosed are a separator and an electrochemical device including the same.Type: ApplicationFiled: August 9, 2017Publication date: May 2, 2019Applicant: LG CHEM, LTD.Inventors: Su-Jin YOON, Hye-Jin KWON, Min-Ji KIM, Chan-Jong KIM, Kwan-Woo NAM
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Publication number: 20190020008Abstract: The present disclosure relates to a separator for an electrochemical device. The separator includes a porous coating layer containing inorganic particles on the surface of a porous polymer substrate, wherein the porous coating layer includes plate-like inorganic particles and spherical inorganic particles as inorganic particles, and shows a step-wise or successive increase in content of inorganic particles a) from the bottom close to the porous polymer substrate to the top, when viewed from the thickness direction of the porous coating layer, and shows a step-wise or successive decrease in content of inorganic particles b) from the bottom close to the porous polymer substrate to the top, when viewed from the thickness direction of the porous coating layer.Type: ApplicationFiled: August 28, 2017Publication date: January 17, 2019Applicant: LG CHEM, LTD.Inventors: Chan-Jong KIM, Su-Jin YOON