Title:
NICKEL-HYDROGEN SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2568971
Kind Code:
B2
Abstract:
PURPOSE: To improve rapid discharging characteristic and life expectancy by forming a nickel-hydrogen secondary battery of a positive electrode filled with an active material paste consisting of a porous conductive base material and Ni(OH)2, CoO and ZnO, for each of which the wt.% is specified, a negative electrode consisting of hydrogen absorption alloy, and of an electrolyte consisting of KOH and LiOH.
CONSTITUTION: For a porous conductive base material, an Ni sponge having 95-97% of communicating holes is used. For an active paste, a required component consisting of Ni(OH)2, CoO and ZnO is used. The Ni(OH)2 is activated as a positive electrode active material, and the compound ratio thereof in the active material paste is 85-98wt.%. CoO is used to improve the utilization efficiency of the active material, while it is a component for degrading rapid discharging characteristic. The compound ratio of CoO is thus 1-7wt.%. ZnO is a component for restricting the reduction in the cycle life, and the compound ratio is also 1-7wt.%. An electrolyte consisting of KOH and LiOH is a component for maintaining the high level of utilization factor of the active material, and the compound ratio is 36-41wt.%.
Inventors:
Atsushi Furukawa
Application Number:
JP7141793A
Publication Date:
January 08, 1997
Filing Date:
March 30, 1993
Export Citation:
Assignee:
Furukawa Battery Co., Ltd.
International Classes:
H01M4/38; H01M4/32; H01M4/52; H01M10/30; (IPC1-7): H01M10/30; H01M4/32; H01M4/52
Domestic Patent References:
| JP541212A | ||||
| JP4212269A | ||||
| JP2304874A | ||||
| JP562706A |
Attorney, Agent or Firm:
Koji Nagato