Patents by Inventor Kwang-Ho Yoo
Kwang-Ho Yoo 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: 20250260044Abstract: A lithium secondary battery includes a positive electrode, a separator, and a negative electrode, wherein the negative electrode includes a silicon-based active material and wherein a resistance ratio represented by Equation 1 is 100% to 140%.Type: ApplicationFiled: April 8, 2025Publication date: August 14, 2025Applicant: LG Energy Solution, Ltd.Inventors: Shulkee Kim, Duyeol Kim, Kimin Park, Kwang Ho Yoo
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Patent number: 12374724Abstract: A method of preparing a secondary battery including pre-lithiating an electrode assembly including an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The pre-lithiating includes supplying lithium ions from one of the plurality of positive electrodes to one of the plurality of negative electrodes up to a state of charge (SOC) of A % by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes and applying a first current, supplying lithium ions from the metal substrate to the positive electrodes up to B % of capacity of the positive electrodes by electrically connecting the metal substrate and the positive electrodes and applying a second current, after applying the first current, and resting the electrode assembly, after applying the second current.Type: GrantFiled: March 5, 2021Date of Patent: July 29, 2025Assignee: LG ENERGY SOLUTION, LTD.Inventors: Dong Jun Lee, Hyun Woo Park, Sa Rah Kim, Dong Hui Kim, Kwang Ho Yoo
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Publication number: 20250239614Abstract: Disclosed are an electrode, a secondary battery comprising the same and an energy storage system, the electrode comprising: an electrode current collector; and an electrode layer on the electrode current collector, the electrode layer comprising an active material, a conductive material and a fluorine-containing binder, wherein the electrode layer has a quantified binder ratio (QBR) of 1.1 or less, and the QBR is defined as the following equation: QBR=Bs/Bf. Bs denotes an average fluorine content in an electrode layer surface region within 15% of a total thickness of the electrode layer from an outermost surface of the electrode layer, and Bf denotes an average fluorine content in an electrode layer bottom region within 15% of the total thickness of the electrode layer from an interface between the electrode layer and the current collector.Type: ApplicationFiled: February 25, 2025Publication date: July 24, 2025Applicant: LG Energy Solution, Ltd.Inventors: Nam-Jeong Lee, Koo-Seung Chung, Sang-Min Kwak, Ji-Hyun Kim, Dong-Oh Shin, Ki-Seok Lee, Kwang-Ho Yoo
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Publication number: 20250226381Abstract: An electrode assembly includes a mono-cell group including at least one mono-cell; a single-sided electrode stacked on at least one side of the upper outermost side and the lower outermost side of the mono-cell group; and a separator interposed between the mono-cell group and the single-sided electrode. The single-sided electrode includes a current collector and an electrode layer disposed merely on one side of the current collector. The electrode layer has a porosity of 30% or less, and the single-sided electrode shows a curl of 30 mm or less. The method of preparing the single-sided electrode is also provided. Additionally, a secondary battery including the electrode assembly and an energy storage system is provided.Type: ApplicationFiled: April 20, 2023Publication date: July 10, 2025Applicant: LG Energy Solution, Ltd.Inventors: Sang-Min Kwak, Kwang-Ho Yoo, Dong-Oh Shin, Nam-Jeong Lee, Ho-Chan Lee
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Publication number: 20250192183Abstract: Disclosed is a method for manufacturing a dry electrode. The method allows determination of the micro-fibrilization degree of a binder resin from the crystallinity of the binder resin. Based on this, the processing conditions of mixed powder for electrode or an electrode film may be controlled. In this manner, it is possible to check and control the processing conditions easily and efficiently. In addition, the method for manufacturing a dry electrode includes a kneading step using a kneader under a low speed and high temperature and pulverization step. Therefore, there is no problem of blocking of a flow path caused by aggregation of the ingredients, which is favorable to mass production.Type: ApplicationFiled: January 30, 2025Publication date: June 12, 2025Applicant: LG Energy Solution, Ltd.Inventors: Seong-Wook Kang, Jae-Sung Han, Dong-Mok Shin, Dong-Oh Shin, Kyung-Hwan Yoon, Kwang-Ho Yoo
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Publication number: 20250132343Abstract: Disclosed are an electrode, a secondary battery comprising the same and an energy storage system, the electrode comprising: an electrode current collector; and an electrode layer on the electrode current collector, the electrode layer comprising an active material, a conductive material and a fluorine-containing binder, wherein the electrode layer has a quantified binder ratio (QBR) of 1.1 or less, and the QBR is defined as the following equation: QBR = Bs / Bf . , Bs denotes an average fluorine content in an electrode layer surface region within 15% of a total thickness of the electrode layer from an outermost surface of the electrode layer, and Bf denotes an average fluorine content in an electrode layer bottom region within 15% of the total thickness of the electrode layer from an interface between the electrode layer and the current collector.Type: ApplicationFiled: October 4, 2022Publication date: April 24, 2025Applicant: LG Energy Solution, Ltd.Inventors: Nam-Jeong Lee, Koo-Seung Chung, Sang-Min Kwak, Ji-Hyun Kim, Dong-Oh Shin, Ki-Seok Lee, Kwang-Ho Yoo
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Publication number: 20250105244Abstract: Disclosed is a method for manufacturing a dry electrode. The method includes buffing the surface of a pre-electrode film formed in a sheet-like shape to remove the surface waviness in the manufacture of an electrode film, and then carrying out a calendering process, thereby ensuring the uniformity of the electrode film thickness and electrode active material density in the electrode film. In other words, it is possible to minimize a deviation in loading amount, porosity and thickness of the electrode depending on the location, and thus to provide improved overall electrochemical performance, including improved battery life characteristics.Type: ApplicationFiled: December 11, 2024Publication date: March 27, 2025Applicant: LG Energy Solution, Ltd.Inventors: Dong-Mok Shin, Sang-Min Keak, Dong-Oh Shin, Kwang-Ho Yoo
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Publication number: 20250105338Abstract: A lithium secondary battery includes a positive electrode, a separator, a negative electrode, and an electrolyte, in which the positive electrode includes a lithium composite transition metal compound including nickel (Ni) and cobalt (Co), the negative electrode includes a mixed negative electrode active material of a silicon-based active material and a carbon-based active material, the electrolyte includes fluoroethylene carbonate, and the efficiency constants of the mixed negative electrode active material and the lithium composite transition metal compound and the part by weight of the fluoroethylene carbonate satisfy a specific Equation.Type: ApplicationFiled: October 11, 2023Publication date: March 27, 2025Applicant: LG Energy Solution, Ltd.Inventors: Kyutae Park, Wonhee Jung, Minsoo Kim, Shulkee Kim, Lilin Piao, Sora Baek, Kwang Ho Yoo, Gyeongseop Lee
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Publication number: 20250105301Abstract: Provided is a collector including an adhesion enhancing layer capable of providing a positive electrode having excellent adhesion and low interfacial resistance, a positive electrode including the same, and a lithium secondary battery including the positive electrode. The collector includes a conductive metal layer, and an adhesion enhancing layer provided on at least one surface of the conductive metal layer, wherein the adhesion enhancing layer has a surface roughness (Ra) of 90 nm to 600 nm and a diiodomethane contact angle of 70° to 120°.Type: ApplicationFiled: January 13, 2023Publication date: March 27, 2025Applicants: LG Chem, Ltd., LG Energy Solution, Ltd.Inventors: Jung Hyun Seo, Min Soo Kim, Dong Oh Shin, Ho Chan Lee, Kwang Ho Yoo, Soon Hwa Jung
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Publication number: 20250105254Abstract: A negative electrode for a secondary battery, includes a current collector, a first negative electrode active material layer, and a second negative electrode active material layer. The first negative electrode active material layer is provided on the current collector and includes a silicon carbon composite. The second negative electrode active material layer is provided on the first negative electrode active material layer and includes a silicon oxide. A secondary battery including the same is also provided.Type: ApplicationFiled: October 13, 2023Publication date: March 27, 2025Applicant: LG Energy Solution, Ltd.Inventors: Kyutae Park, Wonhee Jung, Minsoo Kim, Shulkee Kim, Lilin Piao, Sora Baek, Kwang Ho Yoo, Gyeongseop Lee
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Publication number: 20250054952Abstract: A secondary battery includes a positive electrode, a negative electrode, a separator, and an electrolyte The negative electrode includes a negative electrode active material that has a Si-based active material and a carbon-based active material. The positive electrode includes a Ni-based active material that has a cobalt oxide layer provided on a portion of a surface of a particle.Type: ApplicationFiled: September 5, 2023Publication date: February 13, 2025Applicant: LG Energy Solution, Ltd.Inventors: Shulkee Kim, Misnoo Kim, Sora Baek, Sang Seung Oh, Kwang Ho Yoo
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Patent number: 12218319Abstract: A method of preparing a secondary battery which includes pre-lithiating an electrode assembly which includes an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The metal substrate is present on an outermost surface of the electrode structure in a direction in which the electrode and the separator are stacked. Each positive electrode and negative electrode are spaced apart from each other with one separator of the plurality of separators disposed therebetween. The pre-lithiating includes applying a first current by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes, and applying a second current by electrically connecting the metal substrate and one of the plurality of positive electrodes, after applying the first current.Type: GrantFiled: January 19, 2021Date of Patent: February 4, 2025Assignee: LG ENERGY SOLUTION, LTD.Inventors: Dong Jun Lee, Sa Rah Kim, Dong Hui Kim, Kwang Ho Yoo
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Publication number: 20250038170Abstract: A negative electrode for a secondary battery includes a current collector and a negative electrode active material layer provided on at least one surface of the current collector. The negative electrode active material layer includes a first region corresponding to 50% of a total thickness of the negative electrode active material layer from a surface facing the current collector and a second region corresponding to 50% of the total thickness of the negative electrode active material layer from a surface opposite to the surface facing the current collector. The negative electrode active material layer includes two or more types of negative electrode active materials having D50 different from each other and satisfies the Equations 1 and 2. A secondary battery including the negative electrode is also provided.Type: ApplicationFiled: July 19, 2024Publication date: January 30, 2025Applicant: LG Energy Solution, Ltd.Inventors: Shulkee Kim, Kyutae Park, Cheoljin Oh, Kwang Ho Yoo, Gayoung Lim, Wonhee Jung
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Publication number: 20250038250Abstract: A lithium secondary battery includes a positive electrode, a separator, and a negative electrode, wherein the negative electrode includes a silicon-based active material and wherein a resistance ratio represented by Equation 1 is 100% to 140%.Type: ApplicationFiled: July 19, 2024Publication date: January 30, 2025Applicant: LG Energy Solution, Ltd.Inventors: Shulkee Kim, Duyeol Kim, Kimin Park, Kwang Ho Yoo
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Publication number: 20240274823Abstract: Disclosed is a method for manufacturing a dry electrode. The method allows determination of the micro-fibrilization degree of a binder resin from the crystallinity of the binder resin. Based on this, the processing conditions of mixed powder for electrode or an electrode film may be controlled. In this manner, it is possible to check and control the processing conditions easily and efficiently. In addition, the method for manufacturing a dry electrode includes a kneading step using a kneader under a low speed and high temperature and pulverization step. Therefore, there is no problem of blocking of a flow path caused by aggregation of the ingredients, which is favorable to mass production.Type: ApplicationFiled: April 25, 2024Publication date: August 15, 2024Applicant: LG Energy Solution, Ltd.Inventors: Seong-Wook Kang, Jae-Sung Han, Dong-Mok Shin, Dong-Oh Shin, Kyung-Hwan Yoon, Kwang-Ho Yoo
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Publication number: 20240266542Abstract: The present disclosure relates to a conductive material master batch for use in an electrode and an electrode obtained by using the same. The electrode obtained by using the conductive material master batch has an electrode resistance of 55 ohm·cm or less.Type: ApplicationFiled: April 20, 2023Publication date: August 8, 2024Applicant: LG Energy Solution, Ltd.Inventors: Seong-Wook Kang, Jae-Sung Han, Sang-Min Kwak, Kyung-Hwan Yoon, Dong-Oh Shin, Ki-Seok Lee, Kwang-Ho Yoo, Nam-Jeong Lee
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Patent number: 12007840Abstract: A storage controller and an operating method of the storage controller are provided. The storage controller includes processing circuitry configured to read sub-stripe data from each of a plurality of non-volatile memory devices connected with a RAID (Redundant Array of Inexpensive Disk), check error information of at least one of the sub-stripe data, and perform a RAID recovery operation in response to the at least one of the sub-stripe data having an uncorrectable error, and a RAID memory which stores calculation results of the RAID recovery operation.Type: GrantFiled: November 3, 2021Date of Patent: June 11, 2024Assignee: Samsung Electronics Co., Ltd.Inventors: Kwang Ho Yoo, Seung Min Ha, Kil Hwan Kim, Ho Young Chang, Ju Hyung Hong
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Patent number: 12002962Abstract: Disclosed is a method for manufacturing a dry electrode. The method allows determination of the micro-fibrilization degree of a binder resin from the crystallinity of the binder resin. Based on this, the processing conditions of mixed powder for electrode or an electrode film may be controlled. In this manner, it is possible to check and control the processing conditions easily and efficiently. In addition, the method for manufacturing a dry electrode includes a kneading step using a kneader under a low speed and high temperature and pulverization step. Therefore, there is no problem of blocking of a flow path caused by aggregation of the ingredients, which is favorable to mass production.Type: GrantFiled: August 5, 2022Date of Patent: June 4, 2024Assignee: LG Energy Solution, Ltd.Inventors: Seong-Wook Kang, Jae-Sung Han, Dong-Mok Shin, Dong-Oh Shin, Kyung-Hwan Yoon, Kwang-Ho Yoo
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Publication number: 20240128491Abstract: A lithium secondary battery, and a method of making the same, including a positive electrode, a separator and a negative electrode, in which the positive electrode includes a lithium composite transition metal compound including nickel (Ni) and cobalt (Co), the negative electrode includes a silicon-based active material and a carbon-based active material, the efficiency constants of the silicon-based active material and the carbon-based active material and the efficiency constant of the lithium composite transition metal compound satisfy an efficiency balance defined by Equation 1.Type: ApplicationFiled: October 5, 2023Publication date: April 18, 2024Applicant: LG Energy Solution, Ltd.Inventors: Kyutae Park, Wonhee Jung, Minsoo Kim, Shulkee Kim, Lilin Piao, Sora Baek, Kwang Ho Yoo, Gyeongseop Lee
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Publication number: 20240113283Abstract: A negative electrode for a secondary battery, including: a current collector; a first negative electrode active material layer provided on the current collector; and a second negative electrode active material layer provided on the first negative electrode active material layer, in which at least one of the first and second negative electrode active material layers includes a lithium-substituted carboxymethyl cellulose, and the second negative electrode active material layers includes a silicon-based active material, and a secondary battery including the same.Type: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Applicant: LG Energy Solution, Ltd.Inventors: Shulkee Kim, Gyeongseop Lee, Minsoo Kim, Kyutae Park, Lilin Piao, Sora Baek, Kwang Ho Yoo, Wonhee Jung