Sodium sulfur cell and process of manufacturing the same

Details Sodium sulfur cell and process of manufacturing the same Sodium sulfur cell and process of manufacturing the same

H - Electricity

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319/52

H01M 2/16 (2006.01) H01M 10/26 (2006.01) H01M 10/28 (2006.01) H01M 10/39 (2006.01)

Patent

CA 2021707

A sodium sulfur cell comprising a cathode active material of metallic sodium, and anode active material of sulfur or sodium polysulfide, and a beta alumina solid electrolyte separator, at least one of the above active materials containing, as an impurity, calcium of at most 20 ppm and/or potassium of at most 200 ppm, by weight. The cell of the invention has excellent characteristics, particularly a prolonged electromotive life.

Cellule sodium-soufre comprenant du sodium métallique comme matière active de cathode et du soufre ou du polysulfure de sodium comme matière active d'anode, et de l'alumine bêta en guise de séparateur électrolytique solide, au moins l'une des matières actives susmentionnées contenant, à titre d'impureté, du calcium d'au moins 20 ppm et/ou du potassium d'au moins 200 ppm, en poids. La cellule électrolytique de la présente invention présente d'excellentes caractéristiques, en particulier une durée de vie électromotrice prolongée.

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