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Title:
HYDROGEN STORAGE ELECTRODE
Document Type and Number:
Japanese Patent JP3429684
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To improve the corrosion resistance while providing the water repellency in a surface of an electrode, and accelerate the initial activation by forming a metal plating coat including the fine grains of the thermoplastic resin in a surface of the electrode.
SOLUTION: A pressurized compact of the hydrogen storage alloy grains 2 is integrally connected onto a collector metal 1, and this electrode is plated in the plating liquid so as to form a plating coat 3. Quantity of the plating coat 3 is set at 20 wt.% or less in relation to the quantity of the hydrogen storage alloy, and the plating coat is selected from among Ni, Cu, Co, Ni-P, Ni-B, Co-P, Co-B, and the thermoplastic resin fine grains selected from among polytetrafluoroethylene, polyethylene, an ABS resin, polyamide and polysulfone is contained. Depth (a) of the plating between the alloy grains of the electrode is set at 100 μm or less, and plating thickness (b) coating each alloy grains of an electrode surface layer is set at 1-10 μm. Rise of the internal pressure is thereby restricted, and a battery having a long lifetime is obtained.


Inventors:
Kiyokawa, Tadashi
Kiyokawa, Hajime
Takashima, Masayuki
Application Number:
JP25722098A
Publication Date:
July 22, 2003
Filing Date:
September 10, 1998
Export Citation:
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Assignee:
KIYOKAWA MEKKI KOGYO KK
International Classes:
H01M4/62; H01M4/24; (IPC1-7): H01M4/24; H01M4/62
Attorney, Agent or Firm:
石井 和郎



 
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