Dense alloy anode strip with local stress relief

H - Electricity – 01 – M

Patent

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H01M 4/24 (2006.01) H01M 4/02 (2006.01) H01M 4/38 (2006.01) H01M 4/42 (2006.01) H01M 4/46 (2006.01) H01M 4/74 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2202604

Electrochemical battery comprising thin films including a positive electrode and its collector, and a strip of a host metal designed to constitute subsequently a negative electrode, as well as a conductive electrolyte of alkaline ions and a source of alkaline ions. The host metal strip has cavities whose quantity and arrangement enable it to absorb locally any lateral expansion of the host metal strip and thereby substantially prevent any cumulative change in the plane of the host metal strip when there is initial formation of an alloy in the strip between the host metal and an alkaline metal formed by the alkaline ions. Also described is a method of fabricating the said battery.

Générateur électrochimique comprenant des films minces incluant une électrode positive et son collecteur, et un feuillard d'un métal hôte destiné à constituer ultérieurement une électrode négative, de même qu'un électrolyte conducteur d'ions alcalins ainsi qu'une source d'ions alcalins. Le feuillard de métal hôte présente des vides dont la quantité et la disposition sont propres à absorber localement toute expansion latérale du feuillard de métal hôte et ainsi prévenir substantiellement tout changement cumulatif dans le plan du feuillard de métal hôte lorsqu'il y a formation iritiale d'alliage dans le feuillard entre le métal hôte et un métal alcalin apporté par les ions alcalins. On décrit aussi une méthode de fabrication d'un tel générateur.

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