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Title:
POSITIVE-ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING POSITIVE-ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/106324
Kind Code:
A1
Abstract:
A positive-electrode active material for nonaqueous-electrolyte secondary batteries which comprises a given lithium-transition metal composite oxide having a lamellar structure and a compound A containing Ca and/or Sr, the compound A being present on the surface of or at the boundaries of primary particles of the lithium-transition metal composite oxide. The lamellar structure includes an Li layer where Li reversibly goes in and out, and the proportion of non-lithium metallic element(s) present in the Li layer is 0.7-3.0 mol% with respect to the total amount of the non-lithium metallic elements contained in the lithium-transition metal composite oxide. In analysis by X-ray diffraction, the positive-electrode active material gives an X-ray diffraction pattern in which the ratio of the half-band width m of a diffraction peak for the (003) plane to the half-band width n of a diffraction peak for the (104) plane, m/n, is 0.75≤m/n≤1.0.

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Inventors:
AOKI YOSHINORI
TOGO MASAKAZU
OGASAWARA TAKESHI
Application Number:
PCT/JP2020/035249
Publication Date:
June 03, 2021
Filing Date:
September 17, 2020
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
C01G53/00; H01M4/505; H01M4/525
Foreign References:
JP2018530122A2018-10-11
JP2013030284A2013-02-07
JP5682796B22015-03-11
JP5615926B22014-10-29
JP2016110889A2016-06-20
JP2003100295A2003-04-04
JP2018129221A2018-08-16
Other References:
See also references of EP 4067310A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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