Rechargeable positive electrode

H - Electricity – 01 – M

Patent

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H01M 4/38 (2006.01) H01M 4/02 (2006.01) H01M 4/04 (2006.01) H01M 2/16 (2006.01) H01M 4/60 (2006.01) H01M 4/62 (2006.01) H01M 6/16 (2006.01) H01M 6/18 (2006.01) H01M 6/40 (2006.01) H01M 10/39 (2006.01) H01M 10/44 (2006.01) H01M 10/36 (2006.01) H01M 10/40 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2181822

Disclosed are methods of making solid-phase active-sulfur based composite electrodes. The method begins with a step of combining the electrode components (including an electrochemically active material, an electronic conductor, and an ionic conductor) in a slurry. Next the slurry is homogenized such that the electrode components are well mixed and free of agglomerates. Very soon thereafter, before the electrode components have settled or separated to any significant degree, the slurry is coated on a substrate to form a thin film. Finally, the coated film is dried to form the electrode in such a manner that the electrode components do not significantly redistribute.

La présente invention concerne des procédés de fabrication d'électrodes composites en phase solide, à base de soufre actif. Le procédé commence par une étape consistant à combiner les éléments constitutifs de l'électrode (dont font partie une matière active sur le plan électrochimique, un conducteur électronique et un conducteur ionique) dans une pâte épaisse. Ensuite, la pâte épaisse est homogénéisée de telle façon que les éléments de l'électrode soient bien mélangés et exempts de grumeaux. Très peu de temps après cela, avant que les éléments de l'électrode se soient déposés ou séparés dans quelque mesure notable, la pâte épaisse est appliquée sur un support pour former un film. Enfin, le film ainsi réalisé est séché pour former l'électrode d'une manière telle que ses éléments constitutifs ne changent pas leur répartition dans une mesure importante.

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