Title:
アルカリ二次電池正極活物質用被覆水酸化ニッケル粉末及びその製造方法
Document Type and Number:
Japanese Patent JP5842794
Kind Code:
B2
Abstract:
A coated nickel hydroxide powder that has improved dispersibility in a paste to inhibit agglomeration and can be densely packed in a three-dimensional metal porous body in the preparation of a positive electrode for alkaline secondary battery includes nickel hydroxide particles and a coating layer made of a cobalt compound and formed on a surface of the nickel hydroxide particles, wherein when 10 mL of water is added to 10 g of the coated nickel hydroxide powder to prepare a suspension, a total amount of eluted ions except for oxonium ions, hydroxide ions, and carbonate ions in the suspension is 6.5 mmol/L or less. The coated nickel hydroxide powder obtained through a crystallization step, a coating step, and a washing step is dried in a drying step in a decarbonated atmosphere whose partial pressure of a carbon-containing gas is 15 Pa or less.
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Inventors:
Toshiaki Okato
Nihei Tomonori
Sasaoka Hideo
Nihei Tomonori
Sasaoka Hideo
Application Number:
JP2012254507A
Publication Date:
January 13, 2016
Filing Date:
November 20, 2012
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
H01M4/52
Domestic Patent References:
| JP9147857A | ||||
| JP2012091955A | ||||
| JP2004071304A |
Attorney, Agent or Firm:
Masao Yamamoto
Noriyuki Tsujikawa
Noriyuki Tsujikawa
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