Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALKALINE STORAGE BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/049875
Kind Code:
A1
Abstract:
Provided is a positive electrode active material for an alkaline storage battery having an excellent utilization rate even under a high-temperature condition. The positive electrode active material for an alkaline storage battery includes nickel-containing hydroxide particles containing solid-solutioned cobalt, and a cobalt- containing coating layer coating the hydroxide particles, wherein: the positive electrode active material for an alkaline storage battery have diffraction peaks between diffraction angles of 65°-66° represented by 2θ of a diffraction pattern obtained by X-ray diffraction measurement; among the solid-solutioned cobalts, the content of trivalent cobalt is 30 mass% or more; the proportion of the content ratio of the trivalent cobalt solid-solutioned in the positive electrode active material and having the secondary particle diameter (≤D10) in which the cumulative volume percentage of the secondary particles of 10.0 volume% or less to the content ratio of the trivalent cobalt solid-solutioned in the positive electrode active material is 0.80-1.20; and the proportion of the content ratio the trivalent cobalt solid-solutioned in the positive electrode active material and having the secondary particle diameter (≥D90 or more) in which the cumulative volume percentage of the secondary particles of 90.0 volume% to the content ratio of the trivalent cobalt solid-solutioned in the positive electrode active material is 0.80-1.20.
Inventors:
YASUDA TAIKI (JP)
HATA MIKIO (JP)
HATA MIKIO (JP)
Application Number:
PCT/JP2018/032814
Publication Date:
March 14, 2019
Filing Date:
September 05, 2018
Export Citation:
Assignee:
TANAKA CHEMICAL CORP (JP)
International Classes:
H01M4/52; C01G53/00; H01M4/32; H01M10/30
Foreign References:
| JP2016190784A | 2016-11-10 | |||
| JP2011071125A | 2011-04-07 | |||
| JP2011201764A | 2011-10-13 | |||
| JPH1197008A | 1999-04-09 | |||
| JP2005243602A | 2005-09-08 | |||
| JP2005519021A | 2005-06-30 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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