Alkaline battery with a nickel electrode
AssigneeYuasa Corporation
InventorsMasahiko Oshitani, Heiichi Hasegawa, Hiroshi Yufu
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Abstract
A nickel electrode for an alkaline battery comprises a porous alkaline-proof metal fiber substrate used as a current collector, and active material for the electrode. The active material includes nickel hydroxide powder active material, to which zinc or magnesium is added at a rate in a range of [3] 1 -10 wt % or 1-3 wt %, respectively. The zinc and magnesium is in a solid solution in crystal of the nickel hydroxide, and the active material forms principle compound of paste, which is loaded in the electrode.
Claims4
Active material for a nickel electrode comprising:
- nickel hydroxide powder active material;
- and
- zinc or magnesium which is added to said active material at a rate in a range of .Badd.[3].Baddend. 1 -10 wt% or 1-3 wt%, respectively, said zinc and magnesium being in a solid solution in crystal of said nickel hydroxide, and in distribution of pore radii calculated from [the] a desorption side at nitrogen adsorption isotherm of said powder, development of pore having a radius of 30 .ANG. or more being prevented, and an entire pore volume rate being controlled at 0.05 ml/g or less.
A nickel electrode comprising;
- a porous alkaline-proof metal fiber substrate used as a current collector;
- and
- active material for the electrode;
- said active material including;
- nickel hydroxide powder active material, to which zinc or magnesium is added at a rate in a range of .Badd.[3].Baddend. 1 -10 wt% or 1-3 wt%, respectively, said zinc and magnesium being in a solid solution in crystal of said nickel hydroxide;
- and
- said active material forming principle compound of paste, which is loaded in said electrode.
[4. A nickel electrode as claimed in claim 3 wherein a small amount of cobalt in a solid solution exists in addition to said
- zinc or magnesium.] 5. A nickel electrode as claimed in claim 3 wherein divalent cobalt compound, which forms cobalt complex ion when [dissolven] dissolved in alkaline aqueous solution, is
- added to said active material powder at a rate in a range of 5-15 wt%. 6. A nickel electrode as claimed in claim [3] 5 wherein conductive additives are not included, and [the] conductivity between said [nickel] metal fiber substrate and particles of said active material is substantially maintained only by
- virtue of said cobalt compound additive. 7. An alkaline battery assembled with a nickel electrode as recited in claim [2] 3 without formation, maintained under standing condition one or more days after supplying electrolyte therein, and initially charged after cobalt compound additive is completely dissolved and deposited.
Dependencies are inferred from the claim text.