Title:
METHOD FOR PRODUCING NICKEL METAL HYDRIDE BATTERY, POSITIVE ELECTRODE FOR NICKEL METAL HYDRIDE BATTERIES, AND NICKEL METAL HYDRIDE BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/145701
Kind Code:
A1
Abstract:
A method for producing a nickel metal hydride battery (1) according to the present invention comprises a positive electrode production step in which a positive electrode (2) comprising a positive electrode active material layer (21) that has a graphitization degree of 0.4 or less as determined by Raman spectroscopy spectrum is produced by superposing a starting material composition, which contains a positive electrode active material powder containing nickel hydroxide, a cobalt compound and a flake graphite, on a collector. The method also comprises a negative electrode production step in which a negative electrode (3) is produced by superposing a starting material composition, which contains a negative electrode active material powder, on a collector. The method also comprises: an electrode body production step in which an electrode body is produced by arranging a separator (5) between the positive electrode (2) and the negative electrode (3) and impregnating the separator (5) with an electrolyte solution; and an overdischarge step in which the electrode body is charged, is subsequently overdischarged, and is charged again.
Inventors:
SASAKI HIROYUKI (JP)
KONO SATOSHI (JP)
MOCHIDA SHUHEI (JP)
SHIRAI KEISUKE (JP)
YOSHIDA NORIFUMI (JP)
ISHIKAWA YOSHIFUMI (JP)
OKANISHI TAKEO (JP)
TERASHIMA DAIKI (JP)
OUCHI MASANOBU (JP)
KAIYA HIROYUKI (JP)
OKUMURA MOTOYOSHI (JP)
NAKANO HIROYUKI (JP)
KONO SATOSHI (JP)
MOCHIDA SHUHEI (JP)
SHIRAI KEISUKE (JP)
YOSHIDA NORIFUMI (JP)
ISHIKAWA YOSHIFUMI (JP)
OKANISHI TAKEO (JP)
TERASHIMA DAIKI (JP)
OUCHI MASANOBU (JP)
KAIYA HIROYUKI (JP)
OKUMURA MOTOYOSHI (JP)
NAKANO HIROYUKI (JP)
Application Number:
PCT/JP2023/001995
Publication Date:
August 03, 2023
Filing Date:
January 24, 2023
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
TOYOTA MOTOR CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
H01M10/30; H01M4/04; H01M4/36; H01M4/52; H01M4/62
Foreign References:
| JP2000012011A | 2000-01-14 | |||
| JP2003257425A | 2003-09-12 | |||
| JPH09115521A | 1997-05-02 | |||
| JP2012099275A | 2012-05-24 |
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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