Chemo‑Electrochemical Tandem Catalysis Unlocking Sulfur Reaction in Practical Lithium–Sulfur Batteries

ABSTRACT As next‐generation high‐energy batteries, lithium–sulfur (Li–S) batteries are promising solutions for long‐range electric vehicles due to their ultrahigh theoretical energy density. However, they face fundamental challenges from low sulfur utilization, particularly under electrolyte‐starved practical conditions that polysulfides are unable to dissolve. Here, we propose a chemo‐electrochemical tandem catalyst, Li x TiS 2 , which chemically catalyzes the transformation of S 8 /Li 2 S 8 to Li 2 S 4 and subsequently catalyzes electrochemical reduction to lithium sulfide (Li 2 S). This tandem mechanism fundamentally alters the reaction kinetics from conventional first‐order to zero‐order behavior,…

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  Shenzhen Science and Technology Innovation Program

  Award: JCYJ20220818101008018