Title:
POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/162709
Kind Code:
A1
Abstract:
The present invention provides a positive electrode active material which improves the charge and discharge cycle characteristics of a battery and reduces the direct-current resistance. With respect to a positive electrode mixture layer that is contained in a nonaqueous electrolyte secondary battery according to the present invention, a positive electrode active material comprises a lithium-containing composite oxide that has a layered rock salt structure; the lithium-containing composite oxide contains at least Ni, Ca and Sr; with respect to the lithium-containing composite oxide, the molar ratio (Ca/Sr ratio) of the content of Ca to the content of Sr is 1 or more; the sum of the content of Ca and the content of Sr in the lithium-containing composite oxide is 0.05% by mole to 1% by mole relative to the total number of moles of metal elements in the lithium-containing composite oxide excluding Li, Ca and Sr; a conductive agent contains at least carbon fibers; the length of the carbon fibers is 0.5 µm or more; and the aspect ratio of the carbon fibers is 40 or more.
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Inventors:
TOGO MASAKAZU
INOUE KATSUYA
OGASAWARA TAKESHI
UKA YOUICHIROU
INOUE KATSUYA
OGASAWARA TAKESHI
UKA YOUICHIROU
Application Number:
PCT/JP2023/004486
Publication Date:
August 31, 2023
Filing Date:
February 10, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/131; H01M4/525; H01M4/62
Domestic Patent References:
| WO2021106324A1 | 2021-06-03 | |||
| WO2021200397A1 | 2021-10-07 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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