High temperature stabilization of lithium-sulfur cells with carbon nanotube current collector

► The effect of high temperature on the Li-S cell performance was investigated. ► When operating at 70 °C the cells demonstrated the best rate capability and capacities. ► SEM/EDS studies revealed thicker SEI on the Li anode surface at higher temperatures. ► Thicker SEI prevented polysulfides diffusion and their irreversible reduction into Li2S. ► The increase in inorganic components of the SEI suppressed the Li dendrite growth.