Galvanic primary element

Details Galvanic primary element Galvanic primary element

H - Electricity

01

M

319/24, 319/75

H01M 4/36 (2006.01) H01M 6/22 (2006.01) H01M 12/04 (2006.01)

Patent

CA 1148211

GALVANIC PRIMARY ELEMENT ABSTRACT OF THE DISCLOSURE A galvanic primary element of the system Li/H2O2 comprises a gas diffusion electrode which separates the lithium electrode from the cathode space which is filled with aqeuous H2O2 solution. In the working layer which is flanked by capillary active cover layers of the gas diffusion electrode, automatically drawn-in H2O2 is decomposed into H2O2 and O2 catalytically until the gas pressure is in equilibrium with capillary forces and thereby interrupts the access of additional H2O2 solution to the working layer. Short circuiting of the cell or connection of a load causes a reduction of the gas pressure due to electrochemical reaction of the O2 with the lithium so that fresh reactant solution can flow in. A reaction regime matching the current draw becomes possible because of the property or polyurethane to gel in aqueous H2O2 by virtue of the fact that the H2O2 is slowly pressed out of the gel as out of a sponge by means of a ram toward the gas diffusion electrode.

356921

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