Polysulfide-polyoxide electrolyte membrane for energy storage device

Abstract

An energy storage device is provided that includes a first electrode, a second electrode, and a polymer electrolyte membrane disposed between the first electrode and the second electrode. The polymer electrolyte membrane includes a copolymer network including a polyoxide and a polysulfide. The polymer electrolyte membrane is prelithiated by deep discharging of the battery of in a voltage range of −0.5 V to 5.0 V such that the polymer electrolyte membrane after deep discharging includes additional lithium ions stored therein as compared with prior to deep discharging.

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