A high-power lithium-sulfur battery combining a catholyte and a composite cathode.

Abstract

A lithium battery benefits from the conversion reaction of a soluble polysulfide and a sulfur-based electrode. The battery with S-content from 4.5 to 6.5 mg cm^-2 achieves exceptional energy and power, from 700 W h kg_S^-1 and 100 W kg_S^-1 at 0.1C to 100 W h kg_S^-1 and 35 kW kg_S^-1 at 50C over 500 cycles.