Method of improving the ion selectivity of membranes

Details Method of improving the ion selectivity of membranes Method of improving the ion selectivity of membranes

1980-08-18

1982-12-21

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Process of cell operation

429101, 429192, 204296, H01M 216

Patent

active

043650090

ABSTRACT:
The invention features an electrochemical cell having two fluid-containing compartments separated by a non-selective microporous membrane. Select ions which would normally pass through the membrane under the influence of an ionic field, are prevented from passing through the membrane by a polyelectrolyte which has migrated through the compartment fluid to the membrane. The polyelectrolyte acts as an ionic barrier to the passage of select ions, thus effectively increasing the ion-selective capability of the membrane and, hence, the coulombic efficiency of the electro-chemical cell.

REFERENCES:
patent: 3015681 (1912-01-01), Long
patent: 3481785 (1969-12-01), Ikari
patent: 3657104 (1972-04-01), Hodgdon
patent: 4074028 (1978-02-01), Well
patent: 4133941 (1979-01-01), Sheibley
patent: 4259417 (1981-03-01), Bellows et al.

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