Title:
ニッケル-水素蓄電池
Document Type and Number:
Japanese Patent JP4033660
Kind Code:
B2
Abstract:
The invention provides a nickel-hydrogen storage battery which shows no deterioration of high rate discharge performance even after prolonged storage. The nickel-hydrogen storage battery of the invention comprises a positive electrode containing a positive active material mainly composed of nickel hydroxide, a negative electrode containing a negative active material mainly composed of a hydrogen-absorbing alloy and an alkaline electrolytic solution, wherein the positive electrode comprises a positive active material mainly composed of nickel hydroxide coated with a cobalt compound having at least one compound selected from the group consisting of niobium compound, titanium compound, magnesium compound and tungsten compound incorporated therein and the negative electrode comprises a CaCu5 type hydrogen-absorbing alloy represented by the chemical formula MmNiaCobMncMd (in which M represents at least one element selected from the group consisting of Ca, Mg and Al), with the proviso that the ratio (c/(c+d)) of the composition (c+d) of Mn and M to the composition (c) of Mn has the following relationship: 0.58<=c/(c+d)<=0.67 In this arrangement, a nickel-hydrogen storage battery can be obtained which shows no deterioration of high rate discharge performance even after prolonged storage.
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Inventors:
Teruhiko Imoto
Kihara Masaru
Aizawa Tatsuya
Mikiro Tadokoro
Yoshitaka Baba
Kihara Masaru
Aizawa Tatsuya
Mikiro Tadokoro
Yoshitaka Baba
Application Number:
JP2001327285A
Publication Date:
January 16, 2008
Filing Date:
October 25, 2001
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M10/30; H01M4/32; H01M4/38; H01M4/52; H01M4/62
Domestic Patent References:
| JP2002117858A | ||||
| JP2001332257A | ||||
| JP1197023A |
Attorney, Agent or Firm:
Takamori Suzuki
Yasuo Asami
Hideo Takahashi
Yoshitaka Takeyama
Yasuo Asami
Hideo Takahashi
Yoshitaka Takeyama