Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2005-02-08
2005-02-08
Tsang-Foster, Susy (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C420S900000
Reexamination Certificate
active
06852447
ABSTRACT:
A metal hydride alkaline storage cell of the present invention comprises a positive electrode, a separator impregnated with an electrolyte, and a negative electrode comprising hydrogen-absorbing alloy powder. On the surface of the hydrogen-absorbing alloy powder, there is formed a layer of hydrogen-absorbing alloy oxide, and on the layer of the oxide, there is dotted a catalytic metal or metal compound formed in a granular state by adding a substance soluble in the electrolyte. The substance is selected from the group consisting of a metal fluoride, a metal chloride, a metal iodide, and a metal sulfide. The proportion of the metal fluoride, the metal chloride, the metal iodide, or the metal sulfide in adding, is restricted within the range of from 0.1 to 2.5 wt. % based on the weight of hydrogen-absorbing alloy powder. When the layer of the hydrogen-absorbing alloy oxide is formed on the surface of the hydrogen-absorbing alloy powder, the reaction area on the surface of the hydrogen-absorbing alloy is increased due to the roughness of the layer. Consequently, the catalytic action of the metal is fully utilized by dotting a catalytic metal or metal compound on the alloy surface, and thereby the inner pressure characteristic (high-rate charge characteristic) of a cell is improved.
REFERENCES:
patent: 5506070 (1996-04-01), Mori et al.
patent: 5879429 (1999-03-01), Yamamura et al.
patent: 6040087 (2000-03-01), Kawakami
patent: 4-169059 (1992-06-01), None
patent: 5-213601 (1993-08-01), None
patent: 7-207493 (1995-08-01), None
patent: 7-211344 (1995-08-01), None
patent: 8-157902 (1996-06-01), None
patent: 8-333603 (1996-12-01), None
patent: 9-49039 (1997-02-01), None
patent: 9-63581 (1997-03-01), None
patent: 10-134806 (1998-05-01), None
Maeda Reizo
Matsuura Yoshinori
Nishio Koji
Nogami Mitsuzo
Shinyama Katsuhiko
Sanyo Electric Co,. Ltd.
Tsang-Foster Susy
LandOfFree
Metal hydride alkaline storage cell and manufacturing method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metal hydride alkaline storage cell and manufacturing method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal hydride alkaline storage cell and manufacturing method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3501729