Patents by Inventor Ji Hee AHN
Ji Hee AHN 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: 11476498Abstract: Provided is a composite solid electrolyte membrane for an all-solid-state secondary battery, including: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, wherein the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer are stacked successively, and the phase transformation layer is disposed in such a manner that it faces a negative electrode when manufacturing an electrode assembly. An all-solid-state secondary battery including the composite solid electrolyte membrane is also provided. The composite solid electrolyte membrane for an all-solid-state secondary battery reduces the interfacial resistance with an electrode, increases ion conductivity, and improves the safety of a battery.Type: GrantFiled: March 22, 2019Date of Patent: October 18, 2022Inventors: Ji-Hoon Ryu, Guilong Jin, Ji-Hee Ahn, Sung-Joong Kang, Jae-Hyun Lee
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Publication number: 20220158155Abstract: Disclosed herein is an electrode drying method for drying a plurality of electrodes in the state in which the electrodes are stacked, the electrode drying method including interposing a hygroscopic film between adjacent ones of the electrodes and drying the electrodes in the state in which the hygroscopic film is interposed between the electrodes, wherein at least one of the surfaces of the hygroscopic film that faces the electrodes has an uneven structure, or an electrode drying method for drying an electrode sheet in the state in which the electrode sheet is wound, the electrode drying method including winding the electrode sheet with a hygroscopic film and drying the electrode sheet in the state in which the hygroscopic film is interposed between overlapping portions of the electrode sheet, wherein at least one of the surfaces of the hygroscopic film that is disposed opposite the electrode sheet has an uneven structure.Type: ApplicationFiled: February 3, 2022Publication date: May 19, 2022Applicant: LG Energy Solution, Ltd.Inventors: Hee-Seok Jeong, Myung-Ki Lee, Joo-Yong Song, Ji-Hee Ahn
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Patent number: 11081762Abstract: An electrode assembly having a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer and a negative electrode current collector stacked successively in a thickness direction of the electrode assembly is provided. A plurality of through-holes is formed to pass through the positive electrode active material layer, separator and the negative electrode active material layer. The positive electrode current collector includes a first sheet shaped current collector and a plurality of first column shaped current collectors extending from the first sheet shaped current collector along the thickness direction of the electrode assembly. The negative electrode current collector includes a second sheet shaped current collector and a plurality of second column shaped current collectors extending from the second sheet shaped current collector along the thickness direction of the electrode assembly.Type: GrantFiled: June 21, 2018Date of Patent: August 3, 2021Assignee: LG CHEM, LTD.Inventors: Joo-Yong Song, Myung-Ki Lee, Ji-Hee Ahn
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Patent number: 11024909Abstract: The present invention relates to a secondary battery that is capable of preventing short circuit from occurring when a nail test is performed. Also, the secondary battery includes a case accommodating an electrolyte and an electrode assembly therein, and the case includes an external layer exposed to the outside, an internal layer disposed in the case, and a short-circuit prevention layer provided in a liquid phase between the external layer and the internal layer.Type: GrantFiled: August 22, 2017Date of Patent: June 1, 2021Inventors: Jooyong Song, Myung Ki Lee, Hee Seok Jeong, Ji Hee Ahn
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Patent number: 11024834Abstract: The present invention relates to an electrode coating apparatus that is capable of adjusting a temperature of electrode slurry. Also, the electrode coating apparatus for applying electrode slurry to an electrode collector includes a storage part storing the electrode slurry, a discharge part discharging the electrode slurry stored in the storage part to the electrode collector, and a heating part heating the discharge part.Type: GrantFiled: September 4, 2017Date of Patent: June 1, 2021Assignee: LG CHEM, LTD.Inventors: Hee Seok Jeong, Myung Ki Lee, Jooyong Song, Ji Hee Ahn
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Patent number: 10991973Abstract: A lithium ion secondary battery including a plurality of electrode laminates, each electrode laminate including a positive electrode, a separator, and a negative electrode being alternatively laminated, each positive electrode and negative electrode having respective positive and negative electrode tabs protruding from a respective line segment, the positive electrode tabs of adjacent electrode laminates face each other and are connected to each other to provide a positive electrode tab bundle and the negative electrode tabs of the adjacent electrode laminates face each other and are connected to each other to provide a negative electrode tab bundle.Type: GrantFiled: December 21, 2017Date of Patent: April 27, 2021Assignee: LG CHEM, LTD.Inventors: Myung Ki Lee, Jooyong Song, Hee Seok Jeong, Ji Hee Ahn
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Publication number: 20210020917Abstract: The present disclosure relates to an electrode for an all solid-state battery and a method for manufacturing the same. The electrode comprises an electrode active material layer, wherein the gaps between the electrode active material particles forming the electrode active material layer are filled with a mixture of a polymeric solid electrolyte, oxidation-/reduction-improving additive and a conductive material. The method for manufacturing the electrode comprises a solvent annealing process, and the dissociation degree and transportability of the oxidation-/reduction-improving additive are increased through the solvent annealing process, thereby improving the life characteristics of a battery.Type: ApplicationFiled: May 3, 2019Publication date: January 21, 2021Applicant: LG Chem, Ltd.Inventors: Jung-Pil Lee, Ji-Hee Ahn, Sung-Joong Kang, Jae-Hyun Lee
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Patent number: 10818907Abstract: A method of preparing an electrode for a secondary battery including: (a) a process of partially coating an electrode slurry containing an electrode mixture and a solvent on an electrode sheet so that coated portions are positioned with an uncoated portion interposed therebetween; (b) a process of drying the coated portions to remove the solvent; and (c) a process of rolling the dried coated portions, wherein a thickness of the coated portion is decreased and the electrode mixture moves to the uncoated portions, resulting in the coated portions disappearing, in the process (c).Type: GrantFiled: September 1, 2017Date of Patent: October 27, 2020Assignee: LG Chem, Ltd.Inventors: Ji Hee Ahn, Eun Ju Lee, Myung Ki Lee, Joo Yong Song, Hee Seok Jeong
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Patent number: 10763508Abstract: The present invention provides a binder for secondary battery contained in an electrode mixture, comprising a binder molecule exhibiting an adhesion to a current collector and active material particles, and a magnetic material displaying magnetism for a magnetic field applied from outside.Type: GrantFiled: July 21, 2016Date of Patent: September 1, 2020Assignee: LG Chem, Ltd.Inventors: Jooyong Song, Ji Hee Ahn, Ji Eun Lee
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Publication number: 20200153041Abstract: Provided is a composite solid electrolyte membrane for an all-solid-state secondary battery, including: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, wherein the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer are stacked successively, and the phase transformation layer is disposed in such a manner that it faces a negative electrode when manufacturing an electrode assembly. An all-solid-state secondary battery including the composite solid electrolyte membrane is also provided. The composite solid electrolyte membrane for an all-solid-state secondary battery reduces the interfacial resistance with an electrode, increases ion conductivity, and improves the safety of a battery.Type: ApplicationFiled: March 22, 2019Publication date: May 14, 2020Applicant: LG Chem, Ltd.Inventors: Ji-Hoon Ryu, Guilong Jin, Ji-Hee Ahn, Sung-Joong Kang, Jae-Hyun Lee
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Publication number: 20200052276Abstract: An electrode assembly having a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer and a negative electrode current collector stacked successively in a thickness direction of the electrode assembly is provided. A plurality of through-holes is formed to pass through the positive electrode active material layer, separator and the negative electrode active material layer. The positive electrode current collector includes a first sheet shaped current collector and a plurality of first column shaped current collectors extending from the first sheet shaped current collector along the thickness direction of the electrode assembly. The negative electrode current collector includes a second sheet shaped current collector and a plurality of second column shaped current collectors extending from the second sheet shaped current collector along the thickness direction of the electrode assembly.Type: ApplicationFiled: June 21, 2018Publication date: February 13, 2020Applicant: LG CHEM, LTD.Inventors: Joo-Yong SONG, Myung-Ki LEE, Ji-Hee AHN
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Publication number: 20200013996Abstract: The present invention relates to a secondary battery that is capable of preventing short circuit from occurring when a nail test is performed. Also, the secondary battery includes a case accommodating an electrolyte and an electrode assembly therein, and the case includes an external layer exposed to the outside, an internal layer disposed in the case, and a short-circuit prevention layer provided in a liquid phase between the external layer and the internal layer.Type: ApplicationFiled: August 22, 2017Publication date: January 9, 2020Applicant: LG Chem, Ltd.Inventors: Jooyong Song, Myung Ki Lee, Hee Seok Jeong, Ji Hee Ahn
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Publication number: 20190173075Abstract: Disclosed herein is an electrode drying method for drying a plurality of electrodes in the state in which the electrodes are stacked, the electrode drying method including interposing a hygroscopic film between adjacent ones of the electrodes and drying the electrodes in the state in which the hygroscopic film is interposed between the electrodes, wherein at least one of the surfaces of the hygroscopic film that faces the electrodes has an uneven structure, or an electrode drying method for drying an electrode sheet in the state in which the electrode sheet is wound, the electrode drying method including winding the electrode sheet with a hygroscopic film and drying the electrode sheet in the state in which the hygroscopic film is interposed between overlapping portions of the electrode sheet, wherein at least one of the surfaces of the hygroscopic film that is disposed opposite the electrode sheet has an uneven structure.Type: ApplicationFiled: November 6, 2017Publication date: June 6, 2019Applicant: LG Chem, Ltd.Inventors: Hee-Seok Jeong, Myung-Ki Lee, Joo-Yong Song, Ji-Hee Ahn
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Publication number: 20190157713Abstract: A lithium ion secondary battery including a plurality of electrode laminates, each electrode laminate including a positive electrode, a separator, and a negative electrode being alternatively laminated, each positive electrode and negative electrode having respective positive and negative electrode tabs protruding from a respective line segment, the positive electrode tabs of adjacent electrode laminates face each other and are connected to each other to provide a positive electrode tab bundle and the negative electrode tabs of the adjacent electrode laminates face each other and are connected to each other to provide a negative electrode tab bundle.Type: ApplicationFiled: December 21, 2017Publication date: May 23, 2019Applicant: LG CHEM, LTD.Inventors: Myung Ki LEE, Jooyong SONG, Hee Seok JEONG, Ji Hee AHN
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Publication number: 20190067674Abstract: A method of preparing an electrode for a secondary battery including: (a) a process of partially coating an electrode slurry containing an electrode mixture and a solvent on an electrode sheet so that coated portions are positioned with an uncoated portion interposed therebetween; (b) a process of drying the coated portions to remove the solvent; and (c) a process of rolling the dried coated portions, wherein a thickness of the coated portion is decreased and the electrode mixture moves to the uncoated portions, resulting in the coated portions disappearing, in the process (c).Type: ApplicationFiled: September 1, 2017Publication date: February 28, 2019Applicant: LG CHEM, LTD.Inventors: Ji Hee AHN, Eun Ju LEE, Myung Ki LEE, Joo Yong SONG, Hee Seok JEONG
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Publication number: 20180337393Abstract: The present invention relates to an electrode coating apparatus that is capable of adjusting a temperature of electrode slurry. Also, the electrode coating apparatus for applying electrode slurry to an electrode collector includes a storage part storing the electrode slurry, a discharge part discharging the electrode slurry stored in the storage part to the electrode collector, and a heating part heating the discharge part.Type: ApplicationFiled: September 4, 2017Publication date: November 22, 2018Applicant: LG CHEM, LTD.Inventors: Hee Seok JEONG, Myung Ki LEE, Jooyong SONG, Ji Hee AHN
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Publication number: 20180151883Abstract: The present invention provides a binder for secondary battery contained in an electrode mixture, comprising a binder molecule exhibiting an adhesion to a current collector and active material particles, and a magnetic material displaying magnetism for a magnetic field applied from outside.Type: ApplicationFiled: July 21, 2016Publication date: May 31, 2018Applicant: LG Chem, Ltd.Inventors: Jooyong Song, Ji Hee Ahn, Ji Eun Lee
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Patent number: 9724655Abstract: The present invention relates to a container for a stirrer used in a stirrer stirring objects through a centrifugal force. The container for the stirrer includes a container body of which the top is opened and in which a receiving space is formed, an outer lid coupled to the top of the container body, and a crushing unit including a supporting member disposed in the receiving space, and a crushing member extending outward from the supporting member and crushing and stirring the objects received in the receiving space. Thus, nanoparticle-sized objects can be rapidly crushed and stirred without agglomeration.Type: GrantFiled: May 30, 2014Date of Patent: August 8, 2017Assignee: LG Chem, Ltd.Inventors: Du Seong Yoon, Song Taek Oh, Ji Hee Ahn
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Patent number: 9698413Abstract: Provided are a cathode active material having high capacity and excellent lifetime characteristics as well as being inexpensive by mixing transition metal oxide having high irreversible capacity with composite dimensional manganese oxide (CDMO) of the following Chemical Formula 1, which has high capacity and good lifetime characteristics but is difficult to be charged and discharged by being used alone, and a lithium secondary battery including the cathode active material: xMnO2.(1?x)Li2MnO3 (0<x<1).Type: GrantFiled: November 22, 2013Date of Patent: July 4, 2017Assignee: LG CHEM, LTD.Inventors: Jung Hwan Park, Hyun Seok Lee, Youn Kyoung Lee, Ji Hee Ahn, Hoe Jin Hah
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Publication number: 20140284408Abstract: The present invention relates to a container for a stirrer used in a stirrer stirring objects through a centrifugal force. The container for the stirrer includes a container body of which the top is opened and in which a receiving space is formed, an outer lid coupled to the top of the container body, and a crushing unit including a supporting member disposed in the receiving space, and a crushing member extending outward from the supporting member and crushing and stirring the objects received in the receiving space. Thus, nanoparticle-sized objects can be rapidly crushed and stirred without agglomeration.Type: ApplicationFiled: May 30, 2014Publication date: September 25, 2014Applicant: LG Chem, Ltd.Inventors: Du Seong Yoon, Song Taek Oh, Ji Hee Ahn