Patents by Inventor Kyung Bin YOO
Kyung Bin 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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Patent number: 11984595Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a cathode active material particle having a specific concentration ratio, an anode; and a separation layer interposed between the cathode and the anode. The lithium secondary battery has improved formation discharge amount, formation discharge efficiency and power output.Type: GrantFiled: October 12, 2021Date of Patent: May 14, 2024Assignee: SK ON CO., LTD.Inventors: Kyung Bin Yoo, Kook Hyun Han, Duck Chul Hwang
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Patent number: 11936041Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a lithium metal oxide including elements the same as those of the first cathode active material particle, and the second cathode active material particle has a uniform composition from a central portion to a surface.Type: GrantFiled: December 14, 2017Date of Patent: March 19, 2024Assignee: SK ON CO., LTD.Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang
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Patent number: 11848442Abstract: A lithium secondary battery includes a cathode formed of a cathode active material including a lithium metal oxide particle having a concentration gradient, and a coating formed on the lithium metal oxide particle, the coating including aluminum, titanium and zirconium, an anode, and a separator interposed between the cathode and the anode. The cathode active material includes 2,000 ppm to 4,000 ppm of aluminum, 4,000 ppm to 9,000 ppm of titanium and 400 ppm to 700 ppm of zirconium, based on the total weight of the cathode active material. The performance of the secondary battery may be maintained under a high temperature condition.Type: GrantFiled: December 8, 2022Date of Patent: December 19, 2023Assignee: SK ON CO., LTD.Inventors: Kyung Bin Yoo, Duck Chul Hwang
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Publication number: 20230268566Abstract: A positive electrode active material has a pressure of gas produced by a reaction with an electrolyte solution of 0.4 to 0.6 atm/mAh. The positive electrode active material according to the present disclosure allows prediction of an amount of gas produced and gas components in a secondary battery cell without actually manufacturing a secondary battery cell. In addition, a process from sample preparation to measurement completion, which is required for measuring an amount of gas produced, may be performed within a short time.Type: ApplicationFiled: January 6, 2023Publication date: August 24, 2023Inventors: Kyung Bin YOO, Duck Chul HWANG
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Patent number: 11735727Abstract: Provided is a lithium secondary battery including a cathode containing a cathode active material in which a central part has a different concentration from a surface part, and a conductive material having a specific composition ratio, and specifically, a lithium secondary battery including a cathode containing a cathode active material in which a central part of one or more kinds of metals configuring the cathode active material has a different concentration from a surface part thereof, and two or more kinds of conductive materials mixed at a specific ratio, thereby having excellent stability and high low-temperature characteristic and high output characteristic as compared to a conventional lithium secondary battery.Type: GrantFiled: February 2, 2022Date of Patent: August 22, 2023Assignee: SK ON CO., LTD.Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang
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Publication number: 20230178727Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention has a structure of a lithium-nickel-based composite oxide. A crystallite size ratio obtained by an XRD analysis is in a range from 1.5 to 3.5, and D(003) exceeds 200 nm. The crystallite size is adjusted to promote movement of lithium ions in the cathode active material so that an initial efficiency of a lithium secondary battery is improved.Type: ApplicationFiled: December 6, 2022Publication date: June 8, 2023Inventors: Mi Jung NOH, Kyung Bin YOO, Kook Hyun HAN
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Publication number: 20230107279Abstract: A lithium secondary battery includes a cathode formed of a cathode active material including a lithium metal oxide particle having a concentration gradient, and a coating formed on the lithium metal oxide particle, the coating including aluminum, titanium and zirconium, an anode, and a separator interposed between the cathode and the anode. The cathode active material includes 2,000 ppm to 4,000 ppm of aluminum, 4,000 ppm to 9,000 ppm of titanium and 400 ppm to 700 ppm of zirconium, based on the total weight of the cathode active material. The performance of the secondary battery may be maintained under a high temperature condition.Type: ApplicationFiled: December 8, 2022Publication date: April 6, 2023Inventors: Kyung Bin YOO, Duck Chul HWANG
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Patent number: 11581533Abstract: A lithium secondary battery includes a cathode formed of a cathode active material including a lithium metal oxide particle having a concentration gradient, and a coating formed on the lithium metal oxide particle, the coating including aluminum, titanium and zirconium, an anode, and a separator interposed between the cathode and the anode. The cathode active material includes 2,000 ppm to 4,000 ppm of aluminum, 4,000 ppm to 9,000 ppm of titanium and 400 ppm to 700 ppm of zirconium, based on the total weight of the cathode active material. The performance of the secondary battery may be maintained under a high temperature condition.Type: GrantFiled: April 10, 2020Date of Patent: February 14, 2023Assignee: SK ON CO., LTD.Inventors: Kyung Bin Yoo, Duck Chul Hwang
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Publication number: 20220416241Abstract: A lithium secondary battery according to an embodiment of the present invention comprises a cathode and an anode. The cathode comprises lithium metal oxide particles that contains lithium and metal elements. The lithium metal oxide particles have a concentration gradient region formed in at least one region between a center and a surface. A concentration of at least one of the metal elements is changed in the concentration gradient region. The anode comprises an anode active material that contains a silicon-based active material and a carbon-based active material. A content of the carbon-based active material in the anode active material is greater than a content of the silicon-based active material.Type: ApplicationFiled: June 27, 2022Publication date: December 29, 2022Inventors: Kook Hyun HAN, Eun Jun Park, Kyung Bin Yoo, Duck Chul Hwang
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Publication number: 20220336788Abstract: A lithium secondary battery comprises a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a constant concentration composition.Type: ApplicationFiled: May 9, 2022Publication date: October 20, 2022Inventors: Duck Chul HWANG, Kyung Bin YOO, Kook Hyun HAN
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Publication number: 20220285675Abstract: A lithium secondary battery includes a cathode including a cathode active material, and an anode facing the cathode. The cathode active material includes a lithium composite oxide particle having a nickel molar ratio of 0.8 or more among elements other than lithium and oxygen, and a reversible lithium-titanium oxide selectively present in a charging region of 4.1 V or more and less than 4.3 V. Life-span stability is improved by the reversible lithium-titanium oxide at a high-voltage region.Type: ApplicationFiled: March 3, 2022Publication date: September 8, 2022Inventors: Kyung Bin YOO, Mi Jung NOH, Jeong Bae YOON
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Patent number: 11355743Abstract: A lithium secondary battery comprises a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a constant concentration composition.Type: GrantFiled: August 6, 2020Date of Patent: June 7, 2022Assignee: SK INNOVATION CO., LTD.Inventors: Duck Chul Hwang, Kyung Bin Yoo, Kook Hyun Han
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Publication number: 20220158182Abstract: Provided is a lithium secondary battery including a cathode containing a cathode active material in which a central part has a different concentration from a surface part, and a conductive material having a specific composition ratio, and specifically, a lithium secondary battery including a cathode containing a cathode active material in which a central part of one or more kinds of metals configuring the cathode active material has a different concentration from a surface part thereof, and two or more kinds of conductive materials mixed at a specific ratio, thereby having excellent stability and high low-temperature characteristic and high output characteristic as compared to a conventional lithium secondary battery.Type: ApplicationFiled: February 2, 2022Publication date: May 19, 2022Inventors: Kook Hyun HAN, Kyung Bin YOO, Duck Chul HWANG
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Publication number: 20220085367Abstract: A cathode active material for a lithium secondary battery includes a lithium metal oxide particle containing nickel (Ni) and cobalt (Co). The lithium metal oxide particle includes a concentration gradient region formed in at least one region between a center of the lithium metal oxide particle and a surface of the lithium metal oxide particle. A ratio of a concentration represented as an atomic percent of Co at the surface relative to a concentration represented as an atomic percent of Co at the center is 6.7 or more.Type: ApplicationFiled: September 14, 2021Publication date: March 17, 2022Inventors: Duck Chul HWANG, Kyung Bin YOO
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Patent number: 11251425Abstract: Provided is a lithium secondary battery including a cathode containing a cathode active material in which a central part has a different concentration from a surface part, and a conductive material having a specific composition ratio, and specifically, a lithium secondary battery including a cathode containing a cathode active material in which a central part of one or more kinds of metals configuring the cathode active material has a different concentration from a surface part thereof, and two or more kinds of conductive materials mixed at a specific ratio, thereby having excellent stability and high low-temperature characteristic and high output characteristic as compared to a conventional lithium secondary battery.Type: GrantFiled: December 7, 2016Date of Patent: February 15, 2022Assignee: SK INNOVATION CO., LTD.Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang
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Patent number: 11251423Abstract: Provided is a lithium secondary battery containing a cathode active material capable of preventing decreases in power and cycle life occurring at the time of adding a sulfur based additive used in order to improve high-temperature storage characteristics to an electrolyte.Type: GrantFiled: August 3, 2020Date of Patent: February 15, 2022Assignee: SK INNOVATION CO., LTD.Inventors: Duck Chul Hwang, Kyung Bin Yoo, Kook Hyun Han
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Publication number: 20220029163Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a cathode active material particle having a specific concentration ratio, an anode; and a separation layer interposed between the cathode and the anode. The lithium secondary battery has improved formation discharge amount, formation discharge efficiency and power output.Type: ApplicationFiled: October 12, 2021Publication date: January 27, 2022Inventors: Kyung Bin Yoo, Kook Hyun Han, Duck Chul Hwang
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Patent number: 11211605Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a cathode active material particle having a specific concentration ratio, an anode; and a separation layer interposed between the cathode and the anode. The lithium secondary battery has improved formation discharge amount, formation discharge efficiency and power output.Type: GrantFiled: January 17, 2019Date of Patent: December 28, 2021Assignee: SK INNOVATION CO., LTD.Inventors: Kyung Bin Yoo, Kook Hyun Han, Duck Chul Hwang
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Publication number: 20200381723Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a lithium metal oxide particle containing nickel (Ni) and manganese (Mn), an anode formed from an anode active material containing a graphite-based material having a crystal interplanar distance (d002) of 3.356 to 3.365 ?, and a separator interposed between the cathode and the anode. The lithium metal oxide particle includes a concentration gradient region formed between a center of the particle and a surface of the particle, and a ratio of a concentration (atomic %) of Ni with respect to a concentration (atomic %) of Mn at the surface of the lithium metal oxide particle is 0.29 or more and less than 6.Type: ApplicationFiled: May 27, 2020Publication date: December 3, 2020Inventors: Duck Chul HWANG, Kyung Bin YOO, Kook Hyun HAN
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Publication number: 20200373557Abstract: A lithium secondary battery comprises a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a constant concentration composition.Type: ApplicationFiled: August 6, 2020Publication date: November 26, 2020Inventors: Duck Chul HWANG, Kyung Bin YOO, Kook Hyun HAN