| abstract |
Described herein are electrolyte compositions comprising a fluorinated solvent, an organic carbonate, a sultone and optionally a borate. The fluorinated solvent may be a fluorinated acyclic carboxylic acid ester, a fluorinated acyclic carbonate, a fluorinated acyclic ether, or mixtures thereof. The organic carbonate may be fluorinated or non-fluorinated. The electrolyte composition is useful in electrochemical cells, such as lithium ion batteries. |