H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 4/24 (2006.01) H01M 6/22 (2006.01)
Patent
CA 2146692
Vibration and shock resistance of alkaline batteries provided with a gel type negative electrode comprising a zinc alloy powder, a gelling agent and an alkaline electrolyte can be improved by using the following three gelling agents in combination in the gel type negative electrode, namely, a crosslinked polyacrylate type water-absorbing polymer having a dispersion viscosity at 25°C of at least 15,000 cps as a 0.5 wt% aqueous solution and having a particle size of mainly 100-900 microns, a crosslinked and branched type polyacrylic acid or a salt thereof having a dispersion viscosity at 25°C of at least 15,000 cps as a 0.5 wt% aqueous solution and having a particle size of mainly 100 microns or smaller, and a granular crosslinked and branched type polyacrylic acid or a salt thereof having a dispersion viscosity at 25°C of at least 15,000 cps as a 0.5 wt% aqueous solution and having a particle size of mainly 100-900 microns. The vibration and shock resistance can further be improved by further adding to the gel type negative electrode at least one of oxides, hydroxides and sulfides of a metal selected from indium, tin and bismuth.
Asaoka Junichi
Kojima Yuri
Mototani Yuji
Marks & Clerk
Matsushita Electric Industrial Co. Ltd.
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