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Title:
NON-AQUEOUS SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE
Document Type and Number:
WIPO Patent Application WO/2021/241761
Kind Code:
A1
Abstract:
Provided is a non-aqueous secondary battery that includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive electrode includes LiNixCoyMnzO2 (0.7 < x < 0.9, 0 < y < 0.2, 0 < z < 0.2) as a lithium-containing metal oxide, and when the positive electrode before and after cycle testing of the non-aqueous secondary battery is analyzed by powder X-ray diffraction using Cu–Kα radiation, the rate of change of the c-axis lattice constant is 1.0% or less. The non-aqueous electrolyte includes 5–20% by volume of acetonitrile and has an ion conductivity of at least 10 mS/cm and less than 15 mS/cm at 20°C.

Inventors:
ITO MAKOTO (JP)
KAMINE HIROKAZU (JP)
MATSUOKA NAOKI (JP)
Application Number:
PCT/JP2021/020557
Publication Date:
December 02, 2021
Filing Date:
May 28, 2021
Export Citation:
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Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
H01M4/131; H01M4/505; H01M4/525; H01M10/052; H01M10/0567; H01M10/0568; H01M10/0569
Domestic Patent References:
WO2019151724A12019-08-08
WO2016017783A12016-02-04
WO2020054863A12020-03-19
WO2015163139A12015-10-29
WO2013062056A12013-05-02
Foreign References:
JP2017054822A2017-03-16
CN109888372A2019-06-14
JP2018098174A2018-06-21
JP2017010924A2017-01-12
JP2016207313A2016-12-08
Other References:
See also references of EP 4009398A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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