Electrochemical element for use at high temperatures

Abstract From the Canadian patent

An electrochemical element for use at a high temperature has an anode a , cathode comprising an intercalation material having an upper reversible~potential-limit of at most 4 V versus Li/Li+ as active material and an electrolyte arranged between the cathode and anode which electrolyte , comprises an ionic liquid with an anion and a cation comprising a pyrrolidinium ring structure having four Carbon atoms and one Nitrogen atom. Experiments revealed that rechargeable batteries comprising such an intercalation material and N-R1-N-R2-pyrrolidinium wherein Rl and R2 are , alkyl groups and R1 may be methyl and R2 may be butyl or hexyl are , particularly suitable for use at a temperature of up …