A battery cell comprises C cathode electrodes comprising a cathode current collector and a cathode active material layer, where C is an integer greater than zero, A anode electrodes comprising an anode current collector and an anode active material layer, where A is an integer greater than zero, and S separators, where S is an integer greater than zero. An electrolyte comprising an additive including at least one of tris(2,2,2-trifluoroethyl) phosphate (TFEP) and a TFEP derivative.