Manufacturing process for an electrochemical generator which...

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H01M 6/18 (2006.01) H01M 10/40 (2006.01) H01M 4/04 (2006.01) H01M 4/62 (2006.01) H01M 6/16 (2006.01)

Patent

CA 2228782

This invention concerns a manufacturing process for an electrochemical generator which uses an organic electrolyte and consists of at least one electrochemical couple composed of two electrodes and an intervening solid, porous polymer film containing the said electrolyte. The process features the following stages: a solution consisting of a polymer dissolved in a solvent is spread on a film support; the said solution-bearing film is immersed in a volatile non-solvent which is miscible with the said solvent in order to precipitate the said polymer, and the said polymer-bearing film is dried to eliminate the said non-solvent; the said couple impregnated with the said electrolyte, composed of the said polymer film between the said electrodes and in contact with them, is pressed while being heated to a temperature that is less than or equal to the temperature at which the said polymer film begins to melt; the result is an incomplete melting of the said polymer; on cooling, the said electrodes become welded together.

La présente invention a pour objet un procédé de fabrication d'un générateur électrochimique électrolyte organique comprenant au moins un couple électrochimique composé de deux électrodes encadrant un film solide de polymère poreux contenant ledit électrolyte, caractérisé par le fait qu'il comprend les étapes suivantes: - on étale une solution d'un polymère dans un solvant sur un support, sous forme d'un film, - on immerge ledit film de solution dans un non-solvant volatil miscible avec ledit solvant afin de précipiter ledit polymère, et on sèche ledit film de polymère pour éliminer ledit non-solvant, - on presse ledit couple imprégné avec ledit électrolyte, composé dudit film de polymère placé entre lesdites électrodes et à leur contact, en le chauffant à une température inférieure ou égale à la température de début de fusion dudit film de polymère de manière a obtenir une fusion incomplète dudit polymère, lesdites électrodes devenant indissociables après refroidissement.

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