A hybrid gel–solid-state polymer electrolyte for long-life lithium oxygen batteries

Abstract

A hybrid gel–solid-state polymer electrolyte has been used as the separator and an electrolyte for lithium oxygen batteries. It can not only avoid electrolyte evaporation but also protect the lithium metal anode during reactions over long-term cycling. Due to its high ionic conductivity and low activation energy, excellent cycling performance is demonstrated, in which the terminal voltage is higher than 2.2 V after 140 cycles at 0.4 mA cm⁻², with a capacity of 1000 mA h g_(composite)⁻¹.