Patents by Inventor Gwang-Yeon Kim
Gwang-Yeon 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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Patent number: 10403934Abstract: The present invention relates to a non-aqueous electrolyte solution including a non-aqueous organic solvent, lithium bis(fluorosulfonyl)imide (LiFSI), and a pyridine-based compound represented by Formula 1, and a lithium secondary battery including the same. The lithium secondary battery of the present invention including the non-aqueous electrolyte solution of the present invention may exhibit excellent low-temperature and room-temperature output characteristics, high-temperature and room-temperature cycle characteristics, and capacity characteristics after high-temperature storage.Type: GrantFiled: September 30, 2016Date of Patent: September 3, 2019Assignee: LG Chem, Ltd.Inventors: Gwang Yeon Kim, Young Min Lim, Chul Haeng Lee, Min Jung Kim, Ha Eun Kim
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Publication number: 20190214681Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.Type: ApplicationFiled: March 11, 2019Publication date: July 11, 2019Applicant: LG Chem, Ltd.Inventors: Chul Haeng Lee, Shul Kee Kim, Gwang Yeon Kim, Doo Kyung Yang
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Patent number: 10276894Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.Type: GrantFiled: September 25, 2015Date of Patent: April 30, 2019Assignee: LG Chem, Ltd.Inventors: Chul Haeng Lee, Shul Kee Kim, Gwang Yeon Kim, Doo Kyung Yang
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Publication number: 20190089004Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes an ionizable lithium salt, an organic solvent, and an additive, wherein the additive includes tetravinylsilane, lithium difluorophosphate, and 1,3-propylene sulfate in a weight ratio of 1:3 to 20:3 to 20, and a total amount of the additive is in a range of 1 wt % to 4 wt % based on a total weight of the non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same.Type: ApplicationFiled: January 18, 2018Publication date: March 21, 2019Applicant: LG Chem, Ltd.Inventors: Ha Eun Kim, Young Min Lim, Gwang Yeon Kim, Chul Haeng Lee
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Publication number: 20190020063Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes an ionizable lithium salt, an organic solvent, and an additive, wherein the additive is a mixed additive which includes lithium difluorophosphate, tertiary alkylbenzene, and tetra-vinyl silane in a weight ratio of 1:1 to 4:0.05 to 0.5, and the additive is included in an amount of 2.5 wt % to 4.5 wt % based on a total weight of the non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same.Type: ApplicationFiled: November 15, 2017Publication date: January 17, 2019Applicant: LG Chem, Ltd.Inventors: Gwang Yeon Kim, Young Min Lim, Ha Eun Kim, Chul Haeng Lee
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Patent number: 10090560Abstract: The present invention relates to a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated ether compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.Type: GrantFiled: September 25, 2015Date of Patent: October 2, 2018Assignee: LG Chem, Ltd.Inventors: Shul Kee Kim, Chul Haeng Lee, Young Min Lim, Gwang Yeon Kim
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Publication number: 20180191021Abstract: The present invention relates to a lithium secondary battery which includes a non-aqueous electrolyte solution including lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorobiphenyl compound, a positive electrode including a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. In the lithium secondary battery including a non-aqueous electrolyte solution for a lithium secondary battery of the present invention, since the non-aqueous electrolyte solution may form a robust solid electrolyte interface (SEI) on the negative electrode during initial charge and may prevent decomposition of the surface of the positive electrode and an oxidation reaction of the electrolyte solution during a high-temperature cycle, excellent low-temperature output characteristics as well as improved high-temperature storage characteristics and life characteristics may be achieved.Type: ApplicationFiled: September 30, 2016Publication date: July 5, 2018Applicant: LG Chem, Ltd.Inventors: Ha Eun Kim, Young Min Lim, Chul Haeng Lee, Min Jung Kim, Gwang Yeon Kim
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Publication number: 20180138547Abstract: The present invention relates to a non-aqueous electrolyte solution including a non-aqueous organic solvent, lithium bis(fluorosulfonyl)imide (LiFSI), and a pyridine-based compound represented by Formula 1, and a lithium secondary battery including the same. The lithium secondary battery of the present invention including the non-aqueous electrolyte solution of the present invention may exhibit excellent low-temperature and room-temperature output characteristics, high-temperature and room-temperature cycle characteristics, and capacity characteristics after high-temperature storage.Type: ApplicationFiled: September 30, 2016Publication date: May 17, 2018Applicant: LG Chem, Ltd.Inventors: Gwang Yeon Kim, Young Min Lim, Chul Haeng Lee, Min Jung Kim, Ha Eun Kim
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Patent number: 9947966Abstract: The present invention relates to a lithium secondary battery comprising a non-aqueous electrolyte solution comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a phosphazene compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous electrolyte solution for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.Type: GrantFiled: September 25, 2015Date of Patent: April 17, 2018Assignee: LG Chem, Ltd.Inventors: Young Min Lim, Shul Kee Kim, Chul Haeng Lee, Gwang Yeon Kim
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Publication number: 20170170517Abstract: The present invention relates to a lithium secondary battery comprising a non-aqueous electrolyte solution comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a phosphazene compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous electrolyte solution for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.Type: ApplicationFiled: September 25, 2015Publication date: June 15, 2017Applicant: LG Chem, Ltd.Inventors: Young Min Lim, Shul Kee Kim, Chul Haeng Lee, Gwang Yeon Kim
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Patent number: 9614253Abstract: Provided is a non-aqueous electrolyte solution including a non-aqueous organic solvent, an imide-based lithium salt, and at least one additive selected from the group consisting of lithium difluoro bis(oxalato)phosphate (LiDFOP), (trimethylsilyl)propyl phosphate (TMSPa), 1,3-propene sultone (PRS), and ethylene sulfate (ESa), as an electrolyte solution additive. According to the electrolyte solution additive for a lithium secondary battery of the present invention, the electrolyte solution additive may improve output characteristics at high and low temperatures and may prevent a swelling phenomenon by suppressing the decomposition of PF6? on the surface of a cathode, which may occur during a high-temperature cycle of a lithium secondary battery including the electrolyte solution additive, and preventing an oxidation reaction of an electrolyte solution.Type: GrantFiled: October 31, 2014Date of Patent: April 4, 2017Assignee: LG Chem, Ltd.Inventors: Gwang Yeon Kim, Chul Haeng Lee, Doo Kyung Yang, Young Min Lim, Shul Kee Kim, Yu Ha An, Jin Hyun Park
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Patent number: 9590273Abstract: Provided are a non-aqueous electrolyte solution which includes a lithium salt including lithium bis(fluorosulfonyl)imide (LiFSI) and an additive including a vinylene carbonate-based compound and a sultone-based compound, and a lithium secondary battery including the non-aqueous electrolyte solution. The lithium secondary battery including the non-aqueous electrolyte solution of the present invention may improve low-temperature output characteristics, high-temperature cycle characteristics, output characteristics after high-temperature storage, and capacity characteristics.Type: GrantFiled: June 2, 2014Date of Patent: March 7, 2017Assignee: LG Chem, Ltd.Inventors: Young Min Lim, Chul Haeng Lee, Doo Kyung Yang, Kyoung Ho Ahn, Gwang Yeon Kim
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Publication number: 20160329601Abstract: The present invention relates to a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated ether compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.Type: ApplicationFiled: September 25, 2015Publication date: November 10, 2016Applicant: LG Chem, Ltd.Inventors: Shul Kee Kim, Chul Haeng Lee, Young Min Lim, Gwang Yeon Kim
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Publication number: 20160329600Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.Type: ApplicationFiled: September 25, 2015Publication date: November 10, 2016Applicant: LG Chem, Ltd.Inventors: Chul Haeng Lee, Shul Kee Kim, Gwang Yeon Kim, Doo Kyung Yang
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Publication number: 20160028115Abstract: Provided is a non-aqueous electrolyte solution including a non-aqueous organic solvent, an imide-based lithium salt, and at least one additive selected from the group consisting of lithium difluoro bis(oxalato)phosphate (LiDFOP), (trimethylsilyl)propyl phosphate (TMSPa), 1,3-propene sultone (PRS), and ethylene sulfate (ESa), as an electrolyte solution additive. According to the electrolyte solution additive for a lithium secondary battery of the present invention, the electrolyte solution additive may improve output characteristics at high and low temperatures and may prevent a swelling phenomenon by suppressing the decomposition of PF6? on the surface of a cathode, which may occur during a high-temperature cycle of a lithium secondary battery including the electrolyte solution additive, and preventing an oxidation reaction of an electrolyte solution.Type: ApplicationFiled: October 31, 2014Publication date: January 28, 2016Applicant: LG Chem, Ltd.Inventors: Gwang Yeon Kim, Chul Haeng Lee, Doo Kyung Yang, Young Min Lim, Shul Kee Kim, Yu Ha An, Jin Hyun Park
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Publication number: 20140272605Abstract: Provided are a non-aqueous electrolyte solution which includes a lithium salt including lithium bis(fluorosulfonyl)imide (LiFSI) and an additive including a vinylene carbonate-based compound and a sultone-based compound, and a lithium secondary battery including the non-aqueous electrolyte solution. The lithium secondary battery including the non-aqueous electrolyte solution of the present invention may improve low-temperature output characteristics, high-temperature cycle characteristics, output characteristics after high-temperature storage, and capacity characteristics.Type: ApplicationFiled: June 2, 2014Publication date: September 18, 2014Applicant: LG CHEM, LTD.Inventors: Young Min Lim, Chul Haeng Lee, Doo Kyung Yang, Kyoung Ho Ahn, Gwang Yeon Kim
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Patent number: 8828476Abstract: Disclosed is a polyimide nanocomposite, which is prepared by mixing modified graphene oxide, polyamic acid, and a solvent to obtain a mixture solution, and heat-curing the mixture solution.Type: GrantFiled: September 6, 2012Date of Patent: September 9, 2014Assignee: Pusan National University Industry-University Cooperation FoundationInventors: Chang-Sik Ha, Myeon-Cheon Choi, Gwang-Yeon Kim
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Publication number: 20120328785Abstract: Disclosed is a polyimide nanocomposite, which is prepared by mixing modified graphene oxide, polyamic acid, and a solvent to obtain a mixture solution, and heat-curing the mixture solution.Type: ApplicationFiled: September 6, 2012Publication date: December 27, 2012Applicant: Pusan National University Industry-University Cooperation FoundationInventors: Chang-Sik Ha, Myeon-Cheon Choi, Gwang-Yeon Kim