Operating Lithium–Sulfur Batteries in an Ultrawide Temperature Range from ‒50 °C to 70 °C

Abstract Lithium–sulfur (Li–S) batteries, boasting a high theoretical energy density, have garnered significant attention. However, their application across wide temperature range remains hindered by the exacerbation of polysulfide shuttle effect and sluggish reaction kinetics. Herein, this work designs nanocomposite electrocatalyst consisting Ni nanoparticles anchored onto carbon nanotubes (denoted as Ni@C/CNT) directly carbonizing metal‐organic framework/CNT (MOF/CNT) composite. This is then coated commercial separator, acting trapper kinetics accelerator for Li–S batteries. In design, Ni@C/CNT features uniform distribution ultrafine nanoparticles, derived from an MOF precursor with ordered metal sites, which facilitates conversion at low chemisorption polysulfides temperatures. Therefore, Ni@C/CNT‐modified cells can stably cycle range, ‒50 °C to 70 °C. They also demonstrate excellent performance high‐sulfur loading (9.0 mg cm −2 ) room exhibit ultralow self‐discharge capacity attenuation 2.59% after 48‐h resting period. These promising results may guide advanced design batteries broad operating‐temperature capabilities.