# US 9,437,873 B2 · Spinel-type lithium manganese-based composite oxide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,873 B2 - Document ID: US9437873B2 - Status: Granted - Kind: B2 - Application number: 14/002,524 - Filed: 2012-02-29 - Published: 2013-12-19 - Granted: 2016-09-06 - Earliest claimed: 2011-03-02 - Assignees: Mitsui Mining & Smelting Co., Ltd. - Applicants: Satoru Taniguchi; Shinya Kagei; Yoshimi Hata - Inventors: Satoru Taniguchi; Shinya Kagei; Yoshimi Hata - Web page: https://patentgrep.com/patent/US9437873B2 ## CPC - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - C01G 45/1242: of the type (Mn2O4)-, e.g. LiMn2O4 or Li(MxMn2-x)O4 - C01G 45/12: Complex oxides containing manganese and at least one other metal element - C01P 2002/32: spinel-type (AB2O4) - C01P 2002/52: containing elements as dopants - C01P 2002/76: by a space-group or by other symmetry indications - Y02E 60/10: Energy storage using batteries - 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 ## Abstract Regarding spinel-type lithium manganese-based composite oxide (LMO) to be used as a positive electrode active substance material for lithium battery, a novel LMO is provided, which is capable of maintaining discharge capacity even if charging and discharging are repeated under high temperatures. An LMO in which the crystallite size is 250 nm to 350 nm, the strain is 0.085 or less and the specific surface area increase rate when placed in water at 25° and pH 7 and ultrasonically dispersed at 40 W ultrasonic intensity for 600 seconds is 10.0% or less, can prevent a decrease in the output that accompanies the repetition of charging and discharging while at a high temperature. ## Claims ### Claim 1 A spinel-type (space group Fd-3m) lithium manganese based composite oxide, wherein crystallite size is 250 nm to 350 nm, strain is 0.085 or less, and wherein a specific surface area increase rate when placed in water at 25° and pH 7 and ultrasonically dispersed at 40 W ultrasonic intensity for 600 seconds is 10.0% or less, and wherein an average particle size (D50) is 5 μm to 25 μm. ### Claim 2 (depends on 1) The spinel-type (space group Fd-3m) lithium manganese based composite oxide according to claim 1, wherein specific surface area after ultrasonic dispersion/specific surface area before ultrasonic dispersion is 1.00 to 1.07. ### Claim 3 (depends on 1) The spinel-type lithium manganese-based composite oxide according to claim 1, represented by the general formula Li1+xM2-xO4 (where M includes Mn and includes any one species or two species or more among the group comprising Mg, Al, Ti, Ni, Co, Mo, W, Nb, Ta, Re and Fe; x is 0.01 to 0.08). ### Claim 4 (depends on 1) The spinel-type lithium manganese-based composite oxide according to claim 1, prepared using electrolytic manganese as manganese raw materials. ### Claim 5 (depends on 1) The spinel-type lithium manganese-based composite oxide according to claim 1, prepared using electrolytic manganese dioxide as manganese raw materials. ### Claim 6 (depends on 1) The spinel-type lithium manganese-based composite oxide according to claim 1, obtained by firing at 850° C. or higher. ### Claim 7 (depends on 2) The spinel-type lithium manganese-based composite oxide according to claim 2, represented by the general formula Li1+xM2-xO4 (where M includes Mn and includes any one species or two species or more among the group comprising Mg, Al, Ti, Ni, Co, Mo, W, Nb, Ta, Re and Fe; x is 0.01 to 0.08). ### Claim 8 (depends on 2) The spinel-type lithium manganese-based composite oxide according to claim 2, prepared using electrolytic manganese as manganese raw materials. ### Claim 9 (depends on 3) The spinel-type lithium manganese-based composite oxide according to claim 3, prepared using electrolytic manganese as manganese raw materials. ### Claim 10 (depends on 2) The spinel-type lithium manganese-based composite oxide according to claim 2, prepared using electrolytic manganese dioxide as manganese raw materials. ### Claim 11 (depends on 3) The spinel-type lithium manganese-based composite oxide according to claim 3, prepared using electrolytic manganese dioxide as manganese raw materials. ### Claim 12 (depends on 2) The spinel-type lithium manganese-based composite oxide according to claim 2, obtained by firing at 850° C. or higher. ### Claim 13 (depends on 3) The spinel-type lithium manganese-based composite oxide according to claim 3, obtained by firing at 850° C. or higher. ### Claim 14 (depends on 4) The spinel-type lithium manganese-based composite oxide according to claim 4, obtained by firing at 850° C. or higher. ### Claim 15 (depends on 5) The spinel-type lithium manganese-based composite oxide according to claim 5, obtained by firing at 850° C. or higher.