Title:
COATED NICKEL HYDROXIDE POWDER FOR POSITIVE ELECTRODE ACTIVE MATERIAL OF ALKALINE SECONDARY BATTERY, AND EVALUATION METHOD FOR COATING ADHESION PROPERTIES OF COATED NICKEL HYDROXIDE POWDER
Document Type and Number:
WIPO Patent Application WO/2014/065145
Kind Code:
A1
Abstract:
Provided are: a coated nickel hydroxide powder which is suitable for use as a positive electrode active material of an alkaline secondary battery, and with which uniformity and adhesive properties of a cobalt compound coating for particle surfaces are improved; and an evaluation method for the adhesive properties of said coating. The transmittance ratio (A-Bmax)/(B0-Bmax) of this coated nickel hydroxide powder for a positive electrode active material of an alkaline secondary battery, said powder being obtained by coating surfaces of nickel hydroxide particles with a cobalt compound, is set so as to be at least 30%. Transmittance A (that of the coated nickel hydroxide powder), transmittance B0 (that of a nickel hydroxide powder), and transmittance Bmax (that of the nickel hydroxide powder and the cobalt compound corresponding to the cobalt content in the coating) are obtained by inserting and sealing each powder in a cylindrical transparent cell, shaking for a fixed time period, and subsequently extracting the contents and measuring the transmittance of the transparent cell.
Inventors:
KASE KATSUYA (JP)
KUZUO RYUICHI (JP)
SHIRAOKA MINORU (JP)
SASAOKA HIDEO (JP)
KUZUO RYUICHI (JP)
SHIRAOKA MINORU (JP)
SASAOKA HIDEO (JP)
Application Number:
PCT/JP2013/077866
Publication Date:
May 01, 2014
Filing Date:
October 12, 2013
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
H01M4/52
Foreign References:
| JP2002025553A | 2002-01-25 | |||
| JP2010277821A | 2010-12-09 | |||
| JPH09210941A | 1997-08-15 |
Attorney, Agent or Firm:
TSUJIKAWA MICHINORI (JP)
Tsujikawa 典範 (JP)
Tsujikawa 典範 (JP)
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