Patents by Inventor Hyo Shik Kil
Hyo Shik Kil 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: 20240120471Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.Type: ApplicationFiled: November 29, 2023Publication date: April 11, 2024Inventors: Eun Jun PARK, Gwi Ok PARK, Hyo Shik KIL, In Ae LEE
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Patent number: 11870065Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.Type: GrantFiled: June 22, 2023Date of Patent: January 9, 2024Assignee: SK ON CO., LTD.Inventors: Eun Jun Park, Gwi Ok Park, Hyo Shik Kil, In Ae Lee
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Publication number: 20230420642Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3): A/(B2+C2)?4,500??(1) 5?B?1,500??(2) 3?C?1,000??(3) wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.Type: ApplicationFiled: June 21, 2023Publication date: December 28, 2023Inventors: Eun Jun PARK, Gwi Ok PARK, Hyo Shik KIL, In Ae LEE
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Publication number: 20230420666Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.Type: ApplicationFiled: June 22, 2023Publication date: December 28, 2023Inventors: Eun Jun PARK, Gwi Ok PARK, Hyo Shik KIL, In Ae LEE
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Publication number: 20230108931Abstract: A cathode active material for a lithium secondary battery comprises lithium-nickel composite metal oxide particles, each of which has a secondary particle structure in which primary particles are aggregated. The lithium-nickel composite metal oxide particles include a first element including at least one element selected from the group consisting of B, Al, Si, Ti, V, Mn, Fe, Co, Cu, Zn, Zr, Mo and W, and a second element having an ionic radius of 80 pm or more. The second element is different from nickel and the first element. The second element is present on an outer surface of the secondary particle, at grain boundaries between the primary particles and at an inside of the primary particles.Type: ApplicationFiled: September 28, 2022Publication date: April 6, 2023Inventors: Jae Ho Choi, Jik Soo Kim, Mi Jung Noh, Hyo Shik Kil, Ji Sun Lee
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Patent number: 10249877Abstract: Provided is an olivine-type lithium iron phosphate having a composition represented by Formula I, comprising 0.1 to 5% by weight of Li3PO4, and comprising no Li2CO3 or, if present, comprising Li2CO3 in an amount less than 0.25% by weight: Li1+aFe1?xMx(PO4?b)Xb (I) wherein M, X, a, x and b are as defined above. The lithium iron phosphate comprises no lithium carbonate (Li2CO3) or, if present, comprises the Li2CO3 in an extremely small amount, and comprises Li3PO4 having superior electrochemical stability, thermal stability and ionic conductivity, thus advantageously imparting high-temperature and storage stability as well as stability and rate properties to lithium secondary batteries, when used as a cathode active material for the lithium secondary batteries.Type: GrantFiled: February 19, 2010Date of Patent: April 2, 2019Assignee: LG Chem, Ltd.Inventors: Sanghoon Choy, Yong Tae Lee, Hong-Kyu Park, Soo Min Park, Hyo-Shik Kil, Cheol-Hee Park
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Patent number: 8974957Abstract: Provided is a cathode active material having a composition represented by the following Formula I: LiFe(P1-XO4) (I) wherein a molar fraction (1?x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. Furthermore, a cathode active material, wherein a molar fraction (1?x) of phosphorus (P) is lower than 1, contains both Fe2+ and Fe3+, thus advantageously preventing structural deformation, improving ionic conductivity, exhibiting superior rate properties and inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.Type: GrantFiled: October 22, 2009Date of Patent: March 10, 2015Assignee: LG Chem, Ltd.Inventors: Sanghoon Choy, Yong Tae Lee, Hong-Kyu Park, Soo Min Park, Hyo-shik Kil, Cheol-Hee Park, Ji Eun Lee
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Patent number: 8974970Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m (Ni2+)/m (Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: GrantFiled: June 19, 2014Date of Patent: March 10, 2015Assignee: LG Chem, Ltd.Inventors: Sung-Kyun Chang, Hong-Kyu Park, Sinyoung Park, Hyo-shik Kil, Hera Lee
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Patent number: 8962185Abstract: Provided is a cathode mix for lithium secondary batteries, comprising a cathode active material having a composition represented by the following Formula I: LiFe(P1-XO4) (I) wherein a molar fraction (1?x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. The cathode mix maximizes operational efficiency of batteries, minimizes electrode waste and thus reduces manufacturing costs of batteries. Furthermore, The cathode active material, wherein a molar fraction (1?x) of phosphorus (P) is lower than 1, according to the present invention contains both Fe2+ and Fe3+, thus advantageously causing no structural deformation, improving ionic conductivity, exhibiting superior rate properties, inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.Type: GrantFiled: February 19, 2010Date of Patent: February 24, 2015Assignee: LG Chem, Ltd.Inventors: Sanghoon Choy, Yong Tae Lee, Hong-Kyu Park, Soo Min Park, Hyo-Shik Kil, Cheol-Hee Park
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Publication number: 20140299813Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2: 1.0<m(Ni)/m(Mn) ??(1) m(Ni2+)/m(Mn4+)<1 ??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m (Ni2+)/m (Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: ApplicationFiled: June 19, 2014Publication date: October 9, 2014Inventors: Sung-Kyun CHANG, Hong-Kyu PARK, Sinyoung PARK, Hyo-shik KIL, Hera LEE
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Patent number: 8790832Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m(Ni2+)/m(Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: GrantFiled: April 8, 2013Date of Patent: July 29, 2014Assignee: LG Chem, Ltd.Inventors: Sung-Kyun Chang, Hong-Kyu Park, Sinyoung Park, Hyo-shik Kil, Hera Lee
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Publication number: 20130234064Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m (Ni2+)/m (Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: ApplicationFiled: April 8, 2013Publication date: September 12, 2013Applicant: LG CHEM, LTD.Inventors: Sung kyun CHANG, Hong-Kyu PARK, Sinyoung PARK, Hyo-shik KIL, Hera LEE
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Patent number: 8440354Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2 below: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m (Ni2+)/m(Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: GrantFiled: February 25, 2011Date of Patent: May 14, 2013Assignee: LG Chem, Ltd.Inventors: Sung kyun Chang, Hong-Kyu Park, Sinyoung Park, Hyo-shik Kil, Hera Lee
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Patent number: 8277980Abstract: Provided is a cathode active material which is lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and lithium transition metal oxide satisfies the Equation m(Ni)?m(Mn) (in which m (Ni) and m (Mn) represent an molar number of manganese and nickel, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: GrantFiled: July 9, 2010Date of Patent: October 2, 2012Assignee: LG Chem, Ltd.Inventors: Sung kyun Chang, Hong-Kyu Park, Hyo-shik Kil, Jin-hyung Lim
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Patent number: 8268198Abstract: Provided is a precursor for the preparation of a lithium transition metal oxide that is used for the preparation of a lithium transition metal oxide as a cathode active material for a lithium secondary battery, through a reaction with a lithium-containing compound, wherein the precursor contains two or more transition metals, and sulfate ion (SO4)-containing salt ions derived from a transition metal salt for the preparation of the precursor have a content of 0.1 to 0.7% by weight, based on the total weight of the precursor.Type: GrantFiled: April 3, 2009Date of Patent: September 18, 2012Assignee: LG Chem, Ltd.Inventors: Ho Suk Shin, Sung kyun Chang, Hong-Kyu Park, Sinyoung Park, Youngsun Choi, Seung Tae Hong, Hyo-shik Kil
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Publication number: 20110315917Abstract: Provided is a lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, as a cathode active material for lithium secondary battery, wherein the transition metal includes a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and the lithium transition metal oxide satisfies Equations 1 and 2 below: 1.0<m(Ni)/m(Mn)??(1) m(Ni2+)/m(Mn4+)<1??(2) wherein m(Ni)/m(Mn) represents a molar ratio of nickel to manganese and m(Ni2+)/m(Mn4+) represents a molar ratio of Ni2+ to Mn4+. The cathode active material of the present invention has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, in contrast to conventional cathode active materials, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: ApplicationFiled: February 25, 2011Publication date: December 29, 2011Applicant: LG CHEM, LTD.Inventors: Sung kyun CHANG, Hong-Kyu PARK, Sinyoung PARK, Hyo-shik KIL, Hera LEE
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Publication number: 20110287315Abstract: Provided is a cathode active material having a composition represented by the following Formula I: LiFe(P1-XO4) (I) wherein a molar fraction (1-x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. Furthermore, a cathode active material, wherein a molar fraction (1-x) of phosphorus (P) is lower than 1, contains both Fe2+ and Fe3+, thus advantageously preventing structural deformation, improving ionic conductivity, exhibiting superior rate properties and inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.Type: ApplicationFiled: October 22, 2009Publication date: November 24, 2011Applicant: LG CHEM, LTD.Inventors: Sanghoon Choy, Yong Tae Lee, Hong-Kyu Park, Soo Min Park, Hyo-shik Kil, Cheol-Hee Park, Ji Eun Lee
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Publication number: 20110140036Abstract: Provided is a cathode active material which is lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and lithium transition metal oxide satisfies the Equation m(Ni)?m(Mn) (in which m (Ni) and m (Mn) represent an molar number of manganese and nickel, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.Type: ApplicationFiled: July 9, 2010Publication date: June 16, 2011Applicant: LG CHEM, LTD.Inventors: Sung kyun CHANG, Hong-Kyu Park, Hyo-Shik Kil, Jin-hyung Lim
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Publication number: 20110089367Abstract: Provided is a precursor for the preparation of a lithium transition metal oxide that is used for the preparation of a lithium transition metal oxide as a cathode active material for a lithium secondary battery, through a reaction with a lithium-containing compound, wherein the precursor contains two or more transition metals, and sulfate ion (SO4)-containing salt ions derived from a transition metal salt for the preparation of the precursor have a content of 0.1 to 0.7% by weight, based on the total weight of the precursor.Type: ApplicationFiled: April 3, 2009Publication date: April 21, 2011Applicant: LG CHEM, LTD.Inventors: Ho Suk Shin, Sung Kyun Chang, Hong-Kyu Park, Sinyoung Park, Youngsun Choi, Seung Tae Hong, Hyo-Shik Kil
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Publication number: 20100261060Abstract: Provided is an olivine-type lithium iron phosphate having a composition represented by Formula I, comprising 0.1 to 5% by weight of Li3PO4, and comprising no Li2CO3 or, if present, comprising Li2CO3 in an amount less than 0.25% by weight: Lii+aFe1?xMx(PO4?b)Xb (I) wherein M, X, a, x and b are as defined above. The lithium iron phosphate comprises no lithium carbonate (Li2CO3) or, if present, comprises the Li2CO3 in an extremely small amount, and comprises Li3PO4 having superior electrochemical stability, thermal stability and ionic conductivity, thus advantageously imparting high-temperature and storage stability as well as stability and rate properties to lithium secondary batteries, when used as a cathode active material for the lithium secondary batteries.Type: ApplicationFiled: February 19, 2010Publication date: October 14, 2010Applicant: LG CHEM, LTD.Inventors: Sanghoon CHOY, Yong Tae Lee, Hong-Kyu Park, Soo Min Park, Hyo-shik Kil, Cheol-Hee Park