Method for making a nickel positive electrode for an alkaline ba

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode

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427126, H01M 438

Patent

active

040000052

ABSTRACT:
A nickel alkaline storage battery electrode made by vacuum impregnating a porous conductive support with a coagulum of nickel hydroxide, cobalt hydroxide and graphite particles entrained in a three dimensional, reticulated, open-celled polyvinylidene fluoride binder, and thereafter compressing and drying the impregnated support. The coagulum is formed by mechanically suspending the hydroxide and graphite particles in a medium which is not a solvent for the polyvinylidene fluoride in a separate operation dissolving the polyvinylidene fluoride in a solvent which is only slowly soluble in the suspension medium for the particles, and thereafter adding the polyvinylidene fluoride solution to, and intimately mixing it with, the suspension such that the polyvinylidene fluoride slowly precipitates and coagulates substantially uniformly throughout the solution-suspension mixture and entrains the particles therein as coagulation proceeds.

REFERENCES:
patent: 3442715 (1969-05-01), Yee et al.
patent: 3457113 (1969-07-01), Deibert
patent: 3954501 (1976-05-01), Rampel

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