Nickel-cadium storage battery with improved electrical propertie

Details Nickel-cadium storage battery with improved electrical propertie Nickel-cadium storage battery with improved electrical propertie

1991-05-15

1993-01-19

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429215, 429222, H01M 462

Patent

active

051806460

ABSTRACT:
A nickel-cadmium storage battery with improved electrical properties is described in which one or more copolymers of vinyl pyrrolidone is/are added as expander to the active material with which the negative electrode is filled or to the electrolyte. The polymers have a mean molecular weight of 10,000 g/mol to 100,000 g/mol, with a vinyl pyrrolidone content of between 5 and 95 mol-%. The copolymers are added to the active material or to the electrolyte in an amount of 0.1 to 1.0% by weight, based on the active material. As a result of adding the copolymers, a malfunction-free operation of the storage battery is achieved, accompanied by a simultaneously equally as good degree of utilization of the cadmium active material compared with a storage battery which contains homopolymeric polyvinyl pyrrolidone.

REFERENCES:
patent: 2870234 (1959-01-01), Moulton
patent: 4071662 (1978-01-01), Mess et al.
patent: 4232100 (1980-11-01), Magnusson et al.
patent: 4405700 (1983-09-01), Rampel
patent: 4990414 (1991-02-01), Matsui et al.

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