ELECTROCHEMICAL CELLS COMPOSITE CATHODES COMPRISING CATIONIC POLYMERS AND ELECTROACTIVE POLYSULFIDE COMPOUNDS

• Main Authors: ZHANG, SHENGSHUI, CHENG, SONG
• Format: Patent
• Language: English; French
• Published: 01.07.1999
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; CONDUCTORS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; INSULATORS; METALLURGY; ORGANIC CHEMISTRY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

The present invention pertains to solid composite cathodes which comprise (a) an electroactive sulfur-containing cathode material which, in its oxidized state, comprises a polysulfide moiety of the formula, -Sm-, wherein m is an integer from 3 to 10; and (b) a cationic polymer comprising quaternary ammonium salt groups. The present invention also pertains to electric current producing cells comprising such solid composite cathodes, and methods of making such solid composite cathodes and electric current producing cells. L'invention concerne des cathodes composites solides comprenant (a) un matériau de cathode électroactif à base de soufre qui, à l'état oxydé, renferme une fraction polysulfure -Sm-, où m est un entier allant de 3 à 10; et (b) un polymère cationique renfermant des groupes de sels d'ammonium quaternaire. L'invention concerne également des cellules productrices de courant électrique dotées desdites cathodes, ainsi que des procédés relatifs à la fabrication des cathodes et des cellules considérées.