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.