Chemistry: electrical current producing apparatus – product – and – Having specified venting – feeding or circulation structure – Having nonmovable means providing motion between electrolyte...
Patent
1986-12-31
1988-05-31
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Having specified venting, feeding or circulation structure
Having nonmovable means providing motion between electrolyte...
429215, 429225, 429248, H01M 238
Patent
active
047480939
ABSTRACT:
An electrochemical cell, e.g. a lead acid electric storage cell, comprises a positive electrode, a negative electrode, an aqueous electrolyte and, optionally, a porous cell component such as a cell separator interposed between the electrodes. To enhance access of electrolytes to one or both of the electrodes or to the component during operation of the cell and thereby improve cell performance, at least one of the component and the electrodes is porous and includes a promoter in the form of solid material other than graphite having, under the operating conditions of the cell, a zeta potential of such magnitude and polarity as to be capable of inducing electro-osmotic flow of electrolyte into the component or electrode when a current is flowing through electrolyte filled pores thereof. An example of such a material (termed an `electro-osmosis promoter`) is sulphonated polyvinylidene difluoride.
REFERENCES:
patent: 1841998 (1932-01-01), Wilderman
patent: 3021379 (1962-02-01), Jackel
patent: 3333986 (1967-08-01), Chreitzberg et al.
patent: 4177328 (1979-12-01), Rogers
patent: 4555454 (1985-11-01), Shuster
Skapars Anthony
United Kingdom Atomic Energy Authority
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