Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/241027
Kind Code:
A1
Abstract:
This positive electrode active material contains a lithium transition metal composite oxide that contains 85% by mole or more of Ni relative to the total number of moles of metal elements excluding Li. The lithium transition metal composite oxide contains at least one metal element M1 that is selected from among Mg, Ti, Nb, Zr and V in an amount of 3% by mole or less relative to the total number of moles of metal elements excluding Li. In addition, the ratio of the concentration of the metal element M1 contained in the shell of each primary particle of the composite oxide to the concentration of the metal element M1 contained in the core is from 1.01 to 20; and at least one metal element M2 that is selected from among Ca and Sr is present on the surface of each primary particle in an amount of 1% by mole or less relative to the total number of moles of metal elements excluding Li.
Inventors:
TOCHIO TAKAYA
INOUE KATSUYA
OGASAWARA TAKESHI
AOKI YOSHINORI
INOUE KATSUYA
OGASAWARA TAKESHI
AOKI YOSHINORI
Application Number:
PCT/JP2021/014950
Publication Date:
December 02, 2021
Filing Date:
April 08, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/525; C01G53/00
Domestic Patent References:
| WO2018179916A1 | 2018-10-04 |
Foreign References:
| JPH0917430A | 1997-01-17 | |||
| JPH11195416A | 1999-07-21 | |||
| JP2011082150A | 2011-04-21 | |||
| JP2015122299A | 2015-07-02 | |||
| JP2016091626A | 2016-05-23 | |||
| JP2010535699A | 2010-11-25 |
Other References:
ELECTROCHEMICAL SOCIETY BATTERY TECHNICAL COMMITTEE: "DENCHI HANDBOOK [Battery Handbook]", 30 November 2009, THE ELECTROCHEMICAL SOCIETY OF JAPAN , JP , ISBN: 978-4-274-20805-8, article EDITED BY THE ELECTROCHEMICAL SOCIETY OF JAPAN BATTERY TECHNOLOGY COMMITTEE: "3. Thermal stability and property improvement of LiNiO2", pages: 435 - 436, XP009541063
See also references of EP 4160741A4
See also references of EP 4160741A4
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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