ELECTROCHEMICAL CELLS INCLUDING PARTIALLY FLUORINATED SOLUBLE POLYMERS AS ELECTROLYTE ADDITIVES

摘要

Electrochemical cells are provided that include a positive electrode that includes at least one electrochemically active material, a negative electrode, and a liquid charge-carrying electrolyte. The electrolyte includes at least one organic solvent, an electrolyte salt and at least one partially fluorinated polymer additive that is soluble to at least 1 weight percent in the liquid electrolyte. The partially fluorinated polymer additive is the product of polymerization of a monomer mixture that comprises tetrafluoroethylene, vinylidene fluoride, or hexafluoropropylene.