CPC H01M 10/0567 (2013.01) [H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 50/491 (2021.01); H01M 2300/0028 (2013.01)] | 34 Claims |
1. An electrochemical energy storage device electrolyte comprising:
a) an aprotic organic solvent system;
b) a metal salt; and
c) at least one thiophosphate additive having a nitrile terminal group, according to the formula:
wherein:
Y is oxygen or sulfur;
X is independently oxygen or sulfur, with the proviso that if Y is oxygen then at least one X is sulfur;
m and n are either 0, 1, 2 or 3; but m and n must sum equal to 3;
R1 and R2 are independently a C1-C10 substituted or unsubstituted alkyl group, or aryl group; wherein the hydrogen atoms can be unsubstituted or can be a halogen, alkyl, alkoxy, perfluorinated alkyl, silyl, siloxy, silane, sulfoxide, amide, azo, ether, and thioether group or combinations thereof.
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