Patents by Inventor Jae Kyu Jin
Jae Kyu Jin 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: 11870064Abstract: A multilayer electrode includes a current collector, a first electrode mixture layer disposed on at least one surface of the current collector, and a second electrode mixture layer disposed on the first electrode mixture layer. The first and second electrode mixture layers include one or more types of conductive materials. A porosity of the conductive material contained in the second electrode mixture layer is greater than that of the conductive material contained in the first electrode mixture layer. Ion mobility to the inside of an electrode may be improved while maintaining electrical conductivity, by including a conductive material having a relatively great average particle diameter and pores in the conductive material itself. Output characteristics of a lithium secondary battery and charging and discharging performance may be improved.Type: GrantFiled: December 20, 2022Date of Patent: January 9, 2024Assignee: SK ON CO., LTD.Inventors: Byoung Wook Jo, Jae Kyu Jin, Dong Hoon Lee
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Publication number: 20240006589Abstract: A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.Type: ApplicationFiled: September 18, 2023Publication date: January 4, 2024Inventors: Jae Yun MIN, Jeong A. KIM, Sung Jun PARK, Da Bin CHUNG, Jae Kyu JIN, Ji Hwan CHOI
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Patent number: 11777086Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: GrantFiled: August 30, 2022Date of Patent: October 3, 2023Assignee: SK ON CO., LTD.Inventors: Byoung Wook Jo, Jae Kyu Jin
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Publication number: 20230253547Abstract: A cathode for a lithium secondary battery based on the disclosed technology includes: a cathode current collector; and a cathode active material layer including a first cathode active material layer and a second cathode active material layer sequentially laminated on the cathode current collector, wherein the first cathode active material layer and the second cathode active material layer include first cathode active material particles and second cathode active material particles having different particle structures from each other in crystallography or morphology, and a mixing weight ratio of the second cathode active material particles to the first cathode active material particles in the first cathode active material layer may be different from a mixing weight ratio of the second cathode active material particles to the first cathode active material particles in the second cathode active material layers.Type: ApplicationFiled: February 3, 2023Publication date: August 10, 2023Inventors: Byoung Ho KO, Jeong A KIM, Joon Yeob LEE, Jae Kyu JIN
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Publication number: 20230231101Abstract: A method of manufacturing a negative electrode includes styrene butadiene rubber on at least one surface of a negative electrode current collector, applying a second slurry including a negative electrode active material and a polyacrylic acid-based binder onto the first slurry, and drying and rolling the negative electrode current collector to which the first slurry and the second slurry are applied. The negative electrode active material includes a silicon-based negative electrode active material. According to the present disclosure, expansion and contraction of a silicon-based negative electrode active material during charging and discharging may be alleviated, and electrode flexibility may be improved, resulting in a significant improvement in lifespan properties of a secondary battery.Type: ApplicationFiled: January 18, 2023Publication date: July 20, 2023Inventors: Kwang Ho JEONG, Sung Do KIM, Jae Kyu JIN
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Publication number: 20230223548Abstract: According to an exemplary embodiment, there is provided a secondary battery in which a value of K1 represented by the following Expression (1) is 130 to 270: (200*AR+CR+20*CIR)*(1+CA)/CP??(1) in Expression (1), AR is a bulk resistance (?·cm) of the anode, CR is a bulk resistance (?·cm) of the cathode, CIR is an interfacial resistance (?·cm2) between the cathode active material layer and the cathode current collector, CP is 1?D/4.7, D is a pressed density (g/cc) of the cathode, and CA is an adhesive force (N/18 mm) between the cathode active material layer and the cathode current collector.Type: ApplicationFiled: January 13, 2023Publication date: July 13, 2023Inventors: Jae Kyu JIN, Jeong A KIM, Sung Do KIM
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Publication number: 20230120558Abstract: A multilayer electrode includes a current collector, a first electrode mixture layer disposed on at least one surface of the current collector, and a second electrode mixture layer disposed on the first electrode mixture layer. The first and second electrode mixture layers include one or more types of conductive materials. A porosity of the conductive material contained in the second electrode mixture layer is greater than that of the conductive material contained in the first electrode mixture layer. Ion mobility to the inside of an electrode may be improved while maintaining electrical conductivity, by including a conductive material having a relatively great average particle diameter and pores in the conductive material itself. Output characteristics of a lithium secondary battery and charging and discharging performance may be improved.Type: ApplicationFiled: December 20, 2022Publication date: April 20, 2023Inventors: Byoung Wook JO, Jae Kyu JIN, Dong Hoon LEE
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Patent number: 11588151Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: GrantFiled: March 17, 2022Date of Patent: February 21, 2023Assignee: SK ON CO., LTD.Inventors: Byoung Wook Jo, Jae Kyu Jin
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Patent number: 11557755Abstract: A multilayer electrode includes a current collector, a first electrode mixture layer disposed on at least one surface of the current collector, and a second electrode mixture layer disposed on the first electrode mixture layer. The first and second electrode mixture layers include one or more types of conductive materials. A porosity of the conductive material contained in the second electrode mixture layer is greater than that of the conductive material contained in the first electrode mixture layer. Ion mobility to the inside of an electrode may be improved while maintaining electrical conductivity, by including a conductive material having a relatively great average particle diameter and pores in the conductive material itself. Output characteristics of a lithium secondary battery and charging and discharging performance may be improved.Type: GrantFiled: September 16, 2019Date of Patent: January 17, 2023Assignee: SK ON CO., LTD.Inventors: Byoung Wook Jo, Jae Kyu Jin, Dong Hoon Lee
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Publication number: 20220416233Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: ApplicationFiled: August 30, 2022Publication date: December 29, 2022Inventors: Byoung Wook JO, Jae Kyu JIN
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Publication number: 20220336787Abstract: A negative electrode for a secondary battery includes a negative electrode current collector; and a negative electrode active material layer formed on the negative electrode current collector. The negative electrode active material layer includes a silicon-based active material and a conductive material. The conductive material includes carbon nanotubes having a diameter of 4 to 9 nm and 3 to 7 walls, and the carbon nanotubes are included in an amount of 3 wt % to 9 wt % with respect to a total of 100 wt % of the silicon-based active material. The negative electrode shows a negative electrode slurry resistance value of or below a predetermined value to secure excellent conductivity, and according to a manufacturing method, an effect of significantly reducing costs as compared with the conventional case is shown.Type: ApplicationFiled: April 19, 2022Publication date: October 20, 2022Inventors: Joon Yeob Lee, Byoung Ho Ko, Jeong A Kim, Jae Kyu Jin
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Patent number: 11476455Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: GrantFiled: September 16, 2019Date of Patent: October 18, 2022Assignee: SK INNOVATION CO., LTD.Inventors: Byoung Wook Jo, Jae Kyu Jin
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Publication number: 20220320519Abstract: Provided is a method for manufacturing electrode slurry including: a) kneading a first mixture including an electrode active material and a thickener solution; and b) preparing a second mixture including the kneaded first mixture and a conductive agent, in which a solid content in the second mixture is smaller than that of the first mixture.Type: ApplicationFiled: March 3, 2022Publication date: October 6, 2022Inventors: Byoung Ho KO, Jeong A KIM, Joon Yeob LEE, Jae Kyu JIN
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Publication number: 20220209225Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: ApplicationFiled: March 17, 2022Publication date: June 30, 2022Inventors: Byoung Wook JO, Jae Kyu JIN
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Publication number: 20220085360Abstract: A multilayer electrode includes a current collector, a first electrode mixture layer disposed on at least one surface of the current collector, and a second electrode mixture layer disposed on the first electrode mixture layer. The first and second electrode mixture layers include one or more types of conductive materials. A porosity of the conductive material contained in the second electrode mixture layer is greater than that of the conductive material contained in the first electrode mixture layer. Ion mobility to the inside of an electrode may be improved while maintaining electrical conductivity, by including a conductive material having a relatively great average particle diameter and pores in the conductive material itself. Output characteristics of a lithium secondary battery and charging and discharging performance may be improved.Type: ApplicationFiled: November 23, 2021Publication date: March 17, 2022Inventors: Byoung Wook JO, Jae Kyu JIN, Dong Hoon LEE
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Publication number: 20200395603Abstract: A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.Type: ApplicationFiled: April 7, 2020Publication date: December 17, 2020Inventors: Jae Yun MIN, Jeong A KIM, Sung Jun PARK, Da Bin CHUNG, Jae Kyu JIN, Ji Hwan CHOI
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Publication number: 20200185707Abstract: A multilayer electrode includes a current collector, a first electrode mixture layer disposed on at least one surface of the current collector, and a second electrode mixture layer disposed on the first electrode mixture layer. The first and second electrode mixture layers include one or more types of conductive materials. A porosity of the conductive material contained in the second electrode mixture layer is greater than that of the conductive material contained in the first electrode mixture layer. Ion mobility to the inside of an electrode may be improved while maintaining electrical conductivity, by including a conductive material having a relatively great average particle diameter and pores in the conductive material itself. Output characteristics of a lithium secondary battery and charging and discharging performance may be improved.Type: ApplicationFiled: September 16, 2019Publication date: June 11, 2020Inventors: Byoung Wook JO, Jae Kyu JIN, Dong Hoon LEE
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Publication number: 20200091506Abstract: A multilayer anode includes an anode collector, and a plurality of anode mixture layers sequentially stacked on at least one surface of the anode collector, and including natural graphite as an anode active material. A weight ratio of the natural graphite in innermost and outermost anode mixture layers is greater than a weight ratio of the natural graphite in an anode mixture layer located between the innermost and outermost anode mixture layers, in a stacking direction of the plurality of anode mixture layers. Performance of a cell may be improved and calendering-calender contamination occurring in a calendering process and an electrode stripping phenomenon may be prevented.Type: ApplicationFiled: September 16, 2019Publication date: March 19, 2020Inventors: Byoung Wook JO, Jae Kyu JIN
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Publication number: 20180294456Abstract: A microporous polyimide-based film having excellent strength, permeability, and thermal stability is used as a separator for a lithium ion secondary battery, and a method of producing the same is provided.Type: ApplicationFiled: April 2, 2018Publication date: October 11, 2018Inventors: Gwi Gwon Kang, Dong Hoon Lee, Jae Kyu Jin
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Patent number: 7615289Abstract: Disclosed herein is an organic electroluminescent polymer having 9,9-di(fluorenyl)-2,7-fluorenyl unit and an electroluminescent device using the same. Specifically, the current invention provides an organic electroluminescent polymer having 9,9-di(fluorenyl)-2,7-fluorenyl unit, which can be used as a blue electroluminescent polymer and host material by introducing the substituted fluorenyl group at the 9-position of fluorene, and an electroluminescent device using the electroluminescent polymer. The electroluminescent polymer is applicable as a host material for highly pure blue, green and red, having high solubility, high heat stability and high quantum efficiency.Type: GrantFiled: January 28, 2005Date of Patent: November 10, 2009Assignee: SK Energy Co., Ltd.Inventors: Hong You, Weon Jung Choi, Dong Cheol Shin, Sang Soo Lee, Jae Kyu Jin, Jong Wook Kim, Soon Ki Kwon, Yun Hi Kim