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Title:
LITHIUM METAL COMPOSITE OXIDE, LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, AND LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/168091
Kind Code:
A1
Abstract:
This lithium metal composite oxide that can be doped and undoped with lithium ions is characterized by including at least nickel and satisfying each of the following requirements (1)-(3). (1) A BET specific surface area is not more than 1.0 m2/g. (2) When an average secondary particle size D50 is X μm and a calculated particle size is Y μm, a ratio (X/Y) is 1.1-2.9. Note that the calculated particle size is calculated by the following method. Calculated particle size (Y)=2×3/(BET specific surface area × tap density). (3) The ratio (residual lithium amount/BET specific surface area) of an amount (mass%) of residual lithium contained in the lithium metal composite oxide relative to the BET specific surface area (m2/g) is not more than 0.25.

Inventors:
TAKAMORI Kenji (5-10 Aza-Sunahamawari, 45, Shirakata-cho, Fukui-sh, Fukui 31, 〒9103131, JP)
KOBAYASHI Ryota (5-10 Aza-Sunahamawari, 45, Shirakata-cho, Fukui-sh, Fukui 31, 〒9103131, JP)
Application Number:
JP2019/007782
Publication Date:
September 06, 2019
Filing Date:
February 28, 2019
Export Citation:
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Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED (27-1, Shinkawa 2-chome Chuo-k, Tokyo 60, 〒1048260, JP)
TANAKA CHEMICAL CORPORATION (5-10, Aza-Sunahamawari 45, Shirakata-cho, Fukui-sh, Fukui 31, 〒9103131, JP)
International Classes:
H01M4/525; C01G53/00; H01M4/505
Foreign References:
JP2016026981A2016-02-18
JP2011113792A2011-06-09
JP2007123255A2007-05-17
JP2014192136A2014-10-06
Attorney, Agent or Firm:
TANAI Sumio et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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