Patents by Inventor Mi-ru JO
Mi-ru JO 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: 20240088347Abstract: A prelithiated negative electrode, and a secondary battery including a prelithiated electrode, including a negative electrode current collector; and a negative electrode active material layer present on at least one surface of the negative electrode current collector. The negative electrode active material layer includes high-capacity artificial graphite having no carbon coating. The negative electrode active material layer is prelithiated, and the content of lithium intercalated to the prelithiated negative electrode active material layer is 3% to 5% based on the lithium content intercalated when the negative electrode is charged to 100%.Type: ApplicationFiled: November 11, 2020Publication date: March 14, 2024Applicant: LG ENERGY SOLUTION, LTD.Inventors: Hee-Won CHOI, Ye-Ri KIM, Chan-Ki PARK, Mi-Ru JO, Oh-Byong CHAE, Seung-Hae HWANG
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Patent number: 11888157Abstract: Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.Type: GrantFiled: July 26, 2019Date of Patent: January 30, 2024Assignees: Korea University Research and Business Foundation, Research & Business Foundation Sungkyunkwan UniversityInventors: Won Sub Yoon, Yong Mook Kang, Mi Ru Jo, Junghoon Yang, Yunok Kim
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Publication number: 20230327125Abstract: A negative electrode for a lithium secondary battery which includes a negative electrode active material layer including a first negative electrode active material particles containing first graphite and an amorphous carbon layer on the surface of the first graphite, and a second negative electrode active material particles containing second graphite and having no carbon layer on the surface of the second graphite. The weight ratio of the first negative electrode active material to the second negative electrode active material is 4:6 to 6:4, and the negative electrode active material layer has a BET specific surface area of 1.1 m2/g to 1.7 m2/g, and a lithium secondary battery including the same. The lithium secondary battery including the negative electrode for a lithium secondary battery allows quick charging and has improved high-temperature characteristics and safety.Type: ApplicationFiled: March 16, 2022Publication date: October 12, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Jeong-In HAN, Tae-Gyun NOH, Mi-Ru JO, Sung-Bin PARK
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Publication number: 20230299432Abstract: The present invention relates to an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, wherein an electrode tab protrudes from at least an outer periphery of one side of each of a plurality of positive electrodes and a plurality of negative electrodes, the electrode tabs being coupled to each other in tight contact in a stacking direction to constitute an electrode tab bundle, at least one through-hole is formed through the electrode tab bundle, a connection member made of an electrically conductive material is inserted through the through-hole, and an electrode lead is electrically connected to the electrode tab bundle via the connection member in a melted state, and wherein electrical connection between the electrode tab bundle and the electrode lead is achieved by heating and pressing.Type: ApplicationFiled: August 3, 2022Publication date: September 21, 2023Applicant: LG Energy Solution, Ltd.Inventors: Soon Ho Kwon, Mi Ru Jo, Sung Bin Park, Min Gyu Kim, Woo Hyung Cho
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Publication number: 20230268627Abstract: The present invention relates to a method for manufacturing a secondary battery. The method for manufacturing the secondary battery comprises: positioning a plurality of unit cells, each unit cell comprising at least one electrode and at least one separator, wherein the plurality of unit cells are positioned on a surface of a separation film to sequentially fold the unit cells and form a folded cell; attaching a pressing tape to an end of the folded cell; accommodating the folded cell and an electrolyte in a battery case; and pressing an outer surface of the battery case to press the folded cell.Type: ApplicationFiled: September 16, 2021Publication date: August 24, 2023Applicant: LG Energy Solution, Ltd.Inventors: Tae Gyun Noh, Sung Bin Park, Mi Ru Jo, Jeong In Han
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Publication number: 20230261191Abstract: The negative electrode includes a carbon-coated artificial graphite in combination with a non-coated artificial graphite as a negative electrode active material, and thus shows an effect of preventing deterioration caused by deformation of a carbon-coated artificial graphite occurring upon the pressing by virtue of the introduction of the non-coated artificial graphite. The negative electrode maintains electrochemical characteristics well, and for example, is prevented from deterioration of a carbon-coated artificial graphite, and thus is suitable for manufacturing a battery for quick charging.Type: ApplicationFiled: October 12, 2021Publication date: August 17, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Mi-Ru JO, Tae-Gyun NOH, Jeong-In HAN
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Publication number: 20220407048Abstract: A method for manufacturing a negative electrode, including the steps of preparing a negative electrode slurry including low-expansion natural graphite, a binder polymer, a conductive material and a dispersion medium; applying the negative electrode slurry to at least one surface of a negative electrode current collector, drying the coated negative electrode slurry, to form a preliminary negative electrode having a preliminary negative electrode active material layer; and pressing the preliminary negative electrode to obtain the negative electrode having a finished negative electrode active material layer. A difference between the specific surface area of the preliminary negative electrode active material layer before pressing and that of the finished negative electrode active material layer after pressing is 0.5 m2/g to 1.0 m2/g. A negative electrode obtained by the method and a secondary battery including the negative electrode are also disclosed.Type: ApplicationFiled: November 17, 2020Publication date: December 22, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Hee-Won CHOI, Tae-Gyun NOH, Mi-Ru JO, Chan-Ki PARK
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Patent number: 11462731Abstract: A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in step (1).Type: GrantFiled: January 10, 2020Date of Patent: October 4, 2022Inventors: Ye Ri Kim, Yong Mook Kang, Mi Ru Jo, Eun Kyung Kim, Yong Ju Lee, Rae Hwan Jo
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Publication number: 20220238869Abstract: Disclosed is a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material. The negative electrode active material includes SiOx(0.5<x<1.8) and Lia1Tib1O4(0.8?a1?1.4, 1.6?b1?2.2). The Lia1Tib1O4 has an average particle diameter (D50) of 300 nm to 10 ?m, and a/b satisfies 0.4<a/b<1.7. Herein, a is an amount in wt % occupied by the SiOx in the negative electrode active material layer, and b is an amount in wt % occupied by the Lia1Tib1O4 in the negative electrode active material layer.Type: ApplicationFiled: May 29, 2020Publication date: July 28, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Joo Yul BAEK, Hee Won CHOI, Mi Ru JO, Hyuck HUR, Chan Ki PARK
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Publication number: 20220223843Abstract: The present disclosure relates to an electrode for a lithium secondary battery and a lithium secondary battery including the same, the electrode including: a current collector; and an electrode material layer containing an active material and a binder that is formed on at least one surface of the current collector, wherein, when the electrode material layer is divided in half based on the thickness, the upper layer located away from the current collector and corresponding to the thickness of ½ is referred to as an electrode material layer A, and the lower layer located close to the current collector and corresponding to the thickness of ½ is referred to as an electrode material layer B, each of the electrode material layer A and the electrode material layer B contains one or more active material layers, and satisfies all of the conditions (1) to (3) described in claims.Type: ApplicationFiled: June 26, 2020Publication date: July 14, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Jooyul BAEK, Taegyun NOH, Heewon CHOI, Mi Ru JO, Chan Ki PARK
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Publication number: 20220123272Abstract: Discussed is an electrode notching device for a secondary battery, the electrode for a secondary battery, which is manufactured therethrough, and a secondary battery. The electrode notching device for the secondary battery, which notches a non-coating portion of an electrode sheet to provide an electrode tab, includes: a pair of notching molds configured to press and notch the electrode sheet; and a movement prevention roller part provided on pressing surfaces of the pair of notching molds to prevent the electrode sheet from moving when the electrode sheet is notched.Type: ApplicationFiled: April 24, 2020Publication date: April 21, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventor: Mi Ru JO
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Publication number: 20210143420Abstract: Provided are a cathode active material, a cathode comprising same, and a secondary battery. The cathode active material contains crystal water and a manganese-based metal oxide and has a first crystal phase having a two-dimensional crystal structure and a second crystal phase having a three-dimensional crystal structure, wherein the three-dimensional crystal structure is formed by the combination of manganese in the manganese-based metal oxide and oxygen in the crystal water.Type: ApplicationFiled: July 26, 2019Publication date: May 13, 2021Applicants: DONGGUK UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Won Sub YOON, Yong Mook KANG, Mi Ru JO, Junghoon YANG, Yunok KIM
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Publication number: 20200220167Abstract: A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in step (1).Type: ApplicationFiled: January 10, 2020Publication date: July 9, 2020Applicants: LG Chem, Ltd., Dongguk University Industry-Academic Cooperation FoundationInventors: Ye Ri Kim, Yong Mook Kang, Mi Ru Jo, Eun Kyung Kim, Yong Ju Lee, Rae Hwan Jo
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Patent number: 10593943Abstract: The present invention relates to a surface treatment method for lithium cobalt oxide, comprising the steps of: (S1) mixing lithium cobalt oxide and an organic phosphoric acid compound; and (S2) heat treating and calcining the mixture prepared in step (S1). The surface treatment method of the present invention is simpler and has higher reproducibility than a conventional surface coating and doping technique, and can improve electrochemical characteristics by reinforcing the structural stability of lithium cobalt oxide. In addition, LiCoO2 prepared by the surface treatment method of the present invention is structurally stable during charging/discharging and does not cause unnecessary phase transition, and thus has excellent lifetime characteristics.Type: GrantFiled: January 11, 2016Date of Patent: March 17, 2020Inventors: Yong-mook Kang, Seul-hee Min, Mi-ru Jo
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Patent number: 10062899Abstract: According to an embodiment of the present invention, a method for preparing a graphite-titanium oxide composite comprises (S1) a surface-modifying graphite with benzyl alcohol or a cellulose-based material using a sol-gel method, (S2) distributing the surface-modified graphite in a solvent, adding a titanium precursor to the solvent, and mixing the titanium precursor with the surface-modified graphite to obtain a graphite-titanium mixture, and (S3) thermally treating the graphite-titanium mixture to grow a titanium oxide on a surface of the graphite.Type: GrantFiled: August 18, 2014Date of Patent: August 28, 2018Inventors: Yong-mook Kang, Mi-ru Jo, Da-hye Song, Gi-hyeok Lee
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Publication number: 20180123128Abstract: The present invention relates to a surface treatment method for lithium cobalt oxide, comprising the steps of: (S1) mixing lithium cobalt oxide and an organic phosphoric acid compound; and (S2) heat treating and calcining the mixture prepared in step (S1). The surface treatment method of the present invention is simpler and has higher reproducibility than a conventional surface coating and doping technique, and can improve electrochemical characteristics by reinforcing the structural stability of lithium cobalt oxide. In addition, LiCoO2 prepared by the surface treatment method of the present invention is structurally stable during charging/discharging and does not cause unnecessary phase transition, and thus has excellent lifetime characteristics.Type: ApplicationFiled: January 11, 2016Publication date: May 3, 2018Inventors: Yong-mook KANG, Seul-hee MIN, Mi-ru JO
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Publication number: 20180026261Abstract: The present invention relates to a lithium metal oxide having a nickel oxide layer formed on a surface thereof, and represented by Formula 1; and the lithium metal oxide can be prepared by a method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof, the method comprising steps of: (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in Step (1).Type: ApplicationFiled: March 10, 2016Publication date: January 25, 2018Applicants: LG Chem, Ltd., Dongguk University Industry-Academic Cooperation FoundationInventors: Ye Ri KIM, Yong Mook KANG, Mi Ru JO, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO
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Publication number: 20170271650Abstract: According to an embodiment of the present invention, a method for preparing a graphite-titanium oxide composite comprises (S1) a surface-modifying graphite with benzyl alcohol or a cellulose-based material using a sol-gel method, (S2) distributing the surface-modified graphite in a solvent, adding a titanium precursor to the solvent, and mixing the titanium precursor with the surface-modified graphite to obtain a graphite-titanium mixture, and (S3) thermally treating the graphite-titanium mixture to grow a titanium oxide on a surface of the graphite.Type: ApplicationFiled: August 18, 2014Publication date: September 21, 2017Inventors: Yong-mook KANG, Mi-ru JO, Da-hye SONG, Gi-hyeok LEE