Patents by Inventor Yi Jin Jung
Yi Jin Jung 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: 20220399573Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt at a concentration of 1.5 M to 2.0 M, an organic solvent containing ethylene carbonate and ethyl propionate, and a first additive represented by Formula 1, wherein the ethylene carbonate and the ethyl propionate are present in a volume ratio of 1:9 to 1.5:8.5: NC—R—CH?CH—R1—CN ??[Formula 1] In Formula 1, R and R1 are each independently a substituted or unsubstituted alkylene group having 1 to 5 carbon atoms.Type: ApplicationFiled: February 18, 2021Publication date: December 15, 2022Applicant: LG Energy Solution, Ltd.Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yi Jin Jung, Chul Eun Yeom
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Patent number: 11031625Abstract: The present invention relates to a non-aqueous electrolyte for a lithium secondary battery including a pyridine-boron-based compound as an additive and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte including at least two types of lithium salts and a pyridine-boron-based compound and a lithium secondary battery which has an enhanced effect of suppressing an increase in resistance and generation of gas after being stored at high temperature by including both the non-aqueous electrolyte and a negative electrode including lithium titanium oxide (LTO) as a negative electrode active material.Type: GrantFiled: November 26, 2018Date of Patent: June 8, 2021Inventors: Kyoung Ho Ahn, Yi Jin Jung, Yu Ra Jeong, Chul Haeng Lee, Young Min Lim
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Patent number: 10985412Abstract: A method for manufacturing a lithium secondary battery including the steps of manufacturing a lithium secondary battery including an electrode assembly, a non-aqueous electrolyte in which the electrode assembly is impregnated, and a battery case receiving the non-aqueous electrolyte; performing formation of the lithium secondary battery; and performing a degassing process for removing gas generated inside the lithium secondary battery, wherein the non-aqueous electrolyte includes a lithium salt, an organic solvent and 1,2,3-trifluorobenzene as an additive, wherein the 1,2,3-trifluorobenzene is included in an amount of 0.1 wt % to 10 wt % based on the total weight of the non-aqueous electrolyte, and the formation step is performed by charging the state of charge (SOC) of the battery up to 10% to 80%, while applying a voltage of 3.5 V to 4.5 V under a pressure of 0.5 kgf/cm2 to 5 kgf/cm2 at 45° C. to 80° C.Type: GrantFiled: February 2, 2018Date of Patent: April 20, 2021Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yu Ha An, Yi Jin Jung, Yeon Ji Oh
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Patent number: 10892519Abstract: The present invention relates to a solid polymer electrolyte formed of a polymer matrix including a lithium ion conductor, and a method of preparing the same. The solid polymer electrolyte of the present invention can be molded in the form of a film and used in an electrochemical device such as a lithium polymer secondary battery or the like.Type: GrantFiled: March 30, 2017Date of Patent: January 12, 2021Inventors: Kyoung Ho Ahn, Sol Ji Park, Chul Haeng Lee, Jeong Woo Oh, Jung Hoon Lee, Yi Jin Jung
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Patent number: 10862165Abstract: Disclosed is a secondary battery including an electrode assembly, which includes a cathode, an anode and a separator interposed therebetween, and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the electrolyte contains a phosphate-based compound as an additive.Type: GrantFiled: July 11, 2018Date of Patent: December 8, 2020Inventors: Kyoung-Ho Ahn, Chul-Haeng Lee, Doo-Kyung Yang, Jong-Ho Jeon, Yoo-Seok Kim, Min-Jung Kim, Jung-Hoon Lee, Yi-Jin Jung
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Patent number: 10734678Abstract: The present invention relates to a composition for a gel polymer electrolyte and a lithium secondary battery including the same, and more specifically, an objective of the present invention is to provide a secondary battery in which, since an isocyanate-containing monomer is introduced to a composition for a gel polymer electrolyte to induce a urethane reaction with LiOH on a surface of a lithium transition metal oxide to form a coating layer including a urethane bond-containing oligomer on the surface of the lithium transition metal oxide, and thereby side reactions caused by HF in the battery are minimized, capacity characteristics are improved, and adhesion between a positive electrode and a separator is enhanced to minimize the swelling phenomenon of the battery.Type: GrantFiled: February 20, 2017Date of Patent: August 4, 2020Assignee: LG Chem, Ltd.Inventors: Jeong Woo Oh, Kyoung Ho Ahn, Chul Haeng Lee, Yi Jin Jung, Sol Ji Park
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Electrolyte solution for lithium secondary battery and lithium secondary battery comprising the same
Patent number: 10693179Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery that includes an additive for forming a stable SEI film and a protective layer on a surface of an electrode to prevent a chemical reaction between the electrolyte solution and the electrode, and a lithium secondary battery having improved life characteristics and high-temperature stability by including the same.Type: GrantFiled: August 19, 2016Date of Patent: June 23, 2020Assignee: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Chul Haeng Lee, Yi Jin Jung, Jung Hoon Lee -
Patent number: 10629956Abstract: The present invention relates to a method of preparing a lithium secondary battery which includes preparing a lithium secondary battery, which includes an electrode assembly including a positive electrode, a separator, and a negative electrode, a non-aqueous electrolyte solution, in which the electrode assembly is impregnated, and a battery case accommodating the electrode assembly and the non-aqueous electrolyte solution; performing formation on the lithium secondary battery by charging and discharging the lithium secondary battery; and degassing, wherein the positive electrode includes a positive electrode active material and carbon nanotubes as a conductive agent, the non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and monofluorobenzene as an additive, and the performing of the formation is performed by charging to a state of charge (SOC) of 65% to 80% while applying a pressure of 0.5 kgf/cm2 to 5 kgf/cm2 at 60° C. to 80° C.Type: GrantFiled: January 22, 2018Date of Patent: April 21, 2020Assignee: LG Chem, Ltd.Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yu Ha An, Yi Jin Jung
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Patent number: 10601076Abstract: The present invention relates to a composition for a gel polymer electrolyte and a gel polymer electrolyte prepared using the same, and specifically provides a composition for a gel polymer electrolyte including a lithium salt, an organic solvent, and a polymer A having an epoxy group represented by Formula 1, and a polymer B having an amine group and a cyanide group represented by Formula 2, wherein the polymers A and B are included in an amount of 1 to 20 wt % based on the total weight of the composition for a gel polymer electrolyte, and wherein a gel polymer electrolyte for a secondary battery can be prepared that includes a polymer network formed by combining the polymer A having an epoxy group represented by Formula 1 and the polymer B having an amine group and a cyanide group represented by Formula 2 in a three-dimensional structure.Type: GrantFiled: March 30, 2017Date of Patent: March 24, 2020Assignee: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Jung Hoon Lee, Chul Haeng Lee, Jeong Woo Oh, Yi Jin Jung, Sol Ji Park
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Patent number: 10476104Abstract: Provided are a gel polymer electrolyte including a polymer network, and an electrolyte solution impregnated in the polymer network, wherein the polymer network is formed by combining a first oligomer, which includes unit A derived from a monomer including at least one copolymerizable acrylate or acrylic acid, unit C including urethane, and unit E including alkylene group substituted with one or more fluorine, in a three-dimensional structure, and a lithium secondary battery including the gel polymer electrolyte.Type: GrantFiled: October 2, 2015Date of Patent: November 12, 2019Assignee: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Jeong Woo Oh, Chul Haeng Lee, Yi Jin Jung, Sol Ji Park
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Publication number: 20190237823Abstract: A method for manufacturing a lithium secondary battery including the steps of manufacturing a lithium secondary battery including an electrode assembly, a non-aqueous electrolyte in which the electrode assembly is impregnated, and a battery case receiving the non-aqueous electrolyte; performing formation of the lithium secondary battery; and performing a degassing process for removing gas generated inside the lithium secondary battery, wherein the non-aqueous electrolyte includes a lithium salt, an organic solvent and 1,2,3-trifluorobenzen as an additive, wherein the 1,2,3-trifluorobenzen is included in an amount of 0.1 wt % to 10 wt % based on the total weight of the non-aqueous electrolyte, and the formation step is performed by charging the state of charge (SOC) of the battery up to 10% to 80%, while applying a voltage of 3.5 V to 4.5 V under a pressure of 0.5 kgf/cm2 to 5 kgf/cm2 at 45° C. to 80° C.Type: ApplicationFiled: February 2, 2018Publication date: August 1, 2019Applicant: LG Chem, Ltd.Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yu Ha An, Yi Jin Jung, Yeon Ji Oh
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Patent number: 10355309Abstract: The present invention provides a gel polymer electrolyte obtained by polymerizing and gelling a composition for a gel polymer including an organic solvent, an electrolyte salt and a first polymerizable monomer, wherein the gel polymer electrolyte further comprises a compound represented by the following Formula 1 as a first additive: where R1 to R3 are independently hydrogen, an alkyl group having 1 to 5 carbon atoms, an aryl group having 5 to 7 carbon atoms, or a fluorine substituted alkyl group having 1 to 5 carbon atoms, or at least two substituents selected from R1 to R3 are coupled or connected to each other to form a cycle group having a ring atom composed of 2 to 6 carbon atoms or a heterocyclic group having a ring atom composed of 2 to 8 carbon atoms and 1 to 3 oxygen hetero atoms.Type: GrantFiled: October 31, 2014Date of Patent: July 16, 2019Assignee: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Jeong Woo Oh, Yi Jin Jung, Doo Kyung Yang, Min Jung Kim
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Publication number: 20190140321Abstract: The present invention relates to a non-aqueous electrolyte for a lithium secondary battery including a pyridine-boron-based compound as an additive and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte including at least two types of lithium salts and a pyridine-boron-based compound and a lithium secondary battery which has an enhanced effect of suppressing an increase in resistance and generation of gas after being stored at high temperature by including both the non-aqueous electrolyte and a negative electrode including lithium titanium oxide (LTO) as a negative electrode active material.Type: ApplicationFiled: November 26, 2018Publication date: May 9, 2019Applicant: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Yi Jin Jung, Yu Ra Jeong, Chul Haeng Lee, Young Min Lim
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Patent number: 10276893Abstract: The present invention relates to a composition for a gel polymer electrolyte comprising a liquid electrolyte solvent, a lithium salt, a polymerization initiator, and a mixed compound of a first compound and a second compound, and a lithium secondary battery comprising a positive electrode, a negative electrode, a separator, and a gel polymer electrolyte, wherein the gel polymer electrolyte is formed by polymerizing the composition for a gel polymer electrolyte. By comprising a mixed compound of a first compound and a second compound in which the first compound is an amine-based compound comprising polyethylene glycol as a functional group and the second compound is an epoxy-based compound, a composition for a gel polymer electrolyte of the present invention exhibits, when used in a lithium secondary battery, enhanced battery lifespan, excellent high temperature storability, and enhanced battery capacity property by readily inducing a hopping phenomenon.Type: GrantFiled: October 1, 2015Date of Patent: April 30, 2019Assignee: LG Chem, Ltd.Inventors: Sol Ji Park, Kyoung Ho Ahn, Jeong Woo Oh, Chul Haeng Lee, Yi Jin Jung
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Patent number: 10243239Abstract: Provided are a gel polymer electrolyte including a polymer network, and an electrolyte solution impregnated in the polymer network, wherein the polymer network is formed by combining a first oligomer, which includes unit A derived from a monomer including at least one copolymerizable acrylate or acrylic acid, unit C including urethane, and unit E including siloxane, in a three-dimensional structure, and a lithium secondary battery including the gel polymer electrolyte.Type: GrantFiled: October 2, 2015Date of Patent: March 26, 2019Assignee: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Jeong Woo Oh, Chul Haeng Lee, Yi Jin Jung, Sol Ji Park
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Publication number: 20190074538Abstract: The present invention relates to a method of preparing a lithium secondary battery which includes preparing a lithium secondary battery, which includes an electrode assembly including a positive electrode, a separator, and a negative electrode, a non-aqueous electrolyte solution, in which the electrode assembly is impregnated, and a battery case accommodating the electrode assembly and the non-aqueous electrolyte solution; performing formation on the lithium secondary battery by charging and discharging the lithium secondary battery; and degassing, wherein the positive electrode includes a positive electrode active material and carbon nanotubes as a conductive agent, the non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and monofluorobenzene as an additive, and the performing of the formation is performed by charging to a state of charge (SOC) of 65% to 80% while applying a pressure of 0.5 kgf/cm2 to 5 kgf/cm2 at 60° C. to 80° C.Type: ApplicationFiled: January 22, 2018Publication date: March 7, 2019Applicant: LG Chem, Ltd.Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yu Ha An, Yi Jin Jung
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Publication number: 20190051937Abstract: The present invention relates to a composition for a gel polymer electrolyte and a gel polymer electrolyte prepared using the same, and specifically provides a composition for a gel polymer electrolyte including a lithium salt, an organic solvent, and a polymer A having an epoxy group represented by Formula 1, and a polymer B having an amine group and a cyanide group represented by Formula 2, wherein the polymers A and B are included in an amount of 1 to 20 wt % based on the total weight of the composition for a gel polymer electrolyte, and wherein a gel polymer electrolyte for a secondary battery can be prepared that includes a polymer network formed by combining the polymer A having an epoxy group represented by Formula 1 and the polymer B having an amine group and a cyanide group represented by Formula 2 in a three-dimensional structure.Type: ApplicationFiled: March 30, 2017Publication date: February 14, 2019Applicant: LG Chem, Ltd.Inventors: Kyoung Ho AHN, Jung Hoon LEE, Chul Haeng LEE, Jeong Woo OH, Yi Jin JUNG, Sol Ji PARK
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ELECTROLYTE SOLUTION FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME
Publication number: 20190006703Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery that includes an additive for forming a stable SEI film and a protective layer on a surface of an electrode to prevent a chemical reaction between the electrolyte solution and the electrode, and a lithium secondary battery having improved life characteristics and high-temperature stability by including the same.Type: ApplicationFiled: August 19, 2016Publication date: January 3, 2019Applicant: LG Chem, Ltd.Inventors: Kyoung Ho Ahn, Chul Haeng Lee, Yi Jin Jung, Jung Hoon Lee -
Publication number: 20180323471Abstract: Disclosed is a secondary battery including an electrode assembly, which includes a cathode, an anode and a separator interposed therebetween, and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the electrolyte contains a phosphate-based compound as an additive.Type: ApplicationFiled: July 11, 2018Publication date: November 8, 2018Applicant: LG Chem, Ltd.Inventors: Kyoung-Ho Ahn, Chul-Haeng Lee, Doo-Kyung Yang, Jong-Ho Jeon, Yoo-Seok Kim, Min-Jung Kim, Jung-Hoon Lee, Yi-Jin Jung
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Patent number: 10109862Abstract: Disclosed are an anode for secondary batteries and a secondary battery including the same. The anode includes an anode mixture including an anode active material, coated on a current collector, wherein the anode active material includes lithium titanium oxide (LTO) particles provided on surfaces thereof with a cross-linked polymer coating layer, wherein the LTO particles with the cross-linked polymer coating layer formed thereon retain a porous structure formed therebetween, and a cross-linked polymer of the coating layer is a phosphate-based compound.Type: GrantFiled: November 21, 2014Date of Patent: October 23, 2018Assignee: LG Chem, Ltd.Inventors: Kyoung-Ho Ahn, Chul-Haeng Lee, Doo-Kyung Yang, Min-Jung Kim, Jung-Hoon Lee, Yi-Jin Jung