Title:
ニッケル水素二次電池及びニッケル水素二次電池用の負極
Document Type and Number:
Japanese Patent JP5959003
Kind Code:
B2
Abstract:
A nickel-metal hydride secondary cell (2) holds therein an electrode group (22) and an alkaline electrolyte solution containing NaOH as a main constituent of its solute. The electrode group has a positive electrode (24) and a negative electrode (26) lapped one over the other with a separator (28) therebetween. The negative electrode (26) contains a hydrogen absorbing alloy having a composition represented by the general formula: (RE 1-x T x ) 1-y Mg y Ni z-a Al a (where RE is at least one element selected from among Y, Sc and rare-earth elements, T is at least one element selected from among Zr, V and Ca, and subscripts x, y, z and a are values respectively satisfying 0 ¤ x, 0.05 ¤ y ¤ 0.35, 2.8 ¤ z ¤ 3.9, and 0.10 ¤ a ¤ 0.25), the hydrogen absorbing alloy has a crystal structure in which an AB 2 subunit and an AB 5 subunit are superimposed one upon the other, and Cr is substituted for part of the Ni.
Inventors:
Takuya Kai
Jun Ishida
Jun Ishida
Application Number:
JP2012166620A
Publication Date:
August 02, 2016
Filing Date:
July 27, 2012
Export Citation:
Assignee:
FDK Corporation
International Classes:
H01M4/38; H01M4/24; H01M10/30
Domestic Patent References:
| JP2002105564A | ||||
| JP2008071687A | ||||
| JP11323469A | ||||
| JP2007149646A |
Foreign References:
| WO2001048841A1 | ||||
| US4609599 |
Attorney, Agent or Firm:
Eiji Ogawa
Koji Nagato
Koji Nagato