Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/137296
Kind Code:
A1
Abstract:
Provided is a positive electrode active material for a nonaqueous electrolyte secondary battery, the positive electrode active material comprising a Ni-containing lithium composite oxide a, b, wherein the Ni-containing lithium composite oxide a has an average primary particle size of 1 μm or more which is larger than the average primary particle size of the Ni-containing lithium composite oxide b, the Ni-containing lithium composite oxide a has an average secondary particle size of 2 to 6 μm, the Ni-containing lithium composite oxide b has an average primary particle size of 0.05 μm or more and an average secondary particle size of 10 to 20 μm, the Ni-containing lithium composite oxide a contains Mn and at least one of B and Al, the Ni-containing lithium composite oxide b contains Mn, and the ratio of the Ni-containing lithium composite oxide a to the Ni-containing lithium composite oxide b is, in mass ratio, 5:95 to 55:45. A nonaqueous electrolyte secondary battery which has high capacity, good cycle characteristics, and high-rate discharge characteristics can be provided using this positive electrode active material.
Inventors:
HIRATSUKA HIDEKAZU
WATANABE HIROKI
DONOUE KAZUNORI
WATANABE HIROKI
DONOUE KAZUNORI
Application Number:
PCT/JP2019/045909
Publication Date:
July 02, 2020
Filing Date:
November 25, 2019
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/36; H01M4/505; H01M4/525
Domestic Patent References:
| WO2017104178A1 | 2017-06-22 |
Foreign References:
| JP2009032647A | 2009-02-12 | |||
| JP2017152363A | 2017-08-31 | |||
| JP2017107727A | 2017-06-15 | |||
| JP2010086693A | 2010-04-15 | |||
| JP2005174847A | 2005-06-30 | |||
| JP2011113825A | 2011-06-09 |
Other References:
See also references of EP 3905391A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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