# US 8,784,770 B2 · Material for lithium secondary battery of high performance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,770 B2 - Document ID: US8784770B2 - Status: Granted - Kind: B2 - Application number: 13/798,901 - Filed: 2013-03-13 - Published: 2013-08-01 - Granted: 2014-07-22 - Earliest claimed: 2005-04-13 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Hong Kyu Park; Sun sik Shin; Sin young Park; Ho suk Shin; Jens M. Paulsen - Web page: https://patentgrep.com/patent/US8784770B2 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - C01G 45/1228: of the type (MnO2)-, e.g. LiMnO2 or Li(MxMn1-x)O2 - C01G 51/50: of the type (MnO2)n-, e.g. Li(CoxMn1-x)O2 or Li(MyCoxMn1-x-y)O2 - C01G 53/50: of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 - C01G 53/502: containing lithium and cobalt - H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - C01P 2002/54: one element only - C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram - C01P 2002/77: by unit-cell parameters, atom positions or structure diagrams - C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC - C01P 2004/03: obtained by SEM - C01P 2004/84: one phase coated with the other - C01P 2006/10: Solid density - C01P 2006/37: Stability against thermal decomposition - C01P 2006/40: Electric properties - C01P 2006/80: Compositional purity - H01M 10/052: Li-accumulators - H01M 2004/028: {Positive electrodes} - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Provided is a lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 (M, x and y are as defined in the specification) having mixed transition metal oxide layers (“MO layers”) comprising Ni ions and lithium ions, wherein lithium ions intercalate into and deintercalate from the MO layers and a portion of MO layer-derived Ni ions are inserted into intercalation/deintercalation layers of lithium ions (“reversible lithium layers”) thereby resulting in the interconnection between the MO layers. The lithium mixed transition metal oxide of the present invention has a stable layered structure and therefore exhibits improved stability of the crystal structure upon charge/discharge. In addition, a battery comprising such a cathode active material can exhibit a high capacity and a high cycle stability. Further, such a lithium mixed transition metal oxide is substantially free of water-soluble bases, and thereby can provide excellent storage stability, decreased gas evolution and consequently superior high-temperature stability with the feasibility of low-cost mass production. ## Claims ### Claim 1 A lithium mixed transition metal oxide having a composition represented by Formula II, wherein a molar cation mixing ratio for a portion of Ni located in lithium sites of the lithium mixed transition metal oxide is 0.03 to 0.07 of the total content of Ni, and is sufficient to provide a structurally stable layered crystal structure: Lix′M″y′A′z′O2 (II) Wherein 0. 95≦x′≦1.05, 0≦z′<0.05, 1.9