Single Atom‐Particle Tandem Catalysis Enables Enhanced Desolvation Kinetics for Low‐Temperature Li‐S Batteries

作者：Yu-Hang Lin, Jian Wang, Xin Zhang, Xiaomin Cheng, Quan Zhuang, Jing Zhang, Qinghua Guan, Yanli Wang, Chunyin Shen, Hongzhen Lin, Liang Zhan, Licheng Ling, Yongzheng Zhang · 发表于：Advanced Functional Materials · 年份：2025 · DOI：10.1002/adfm.202501496 · 被引用次数：30 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Advanced Battery Technologies Research

Abstract The commercial implementation of lithium‐sulfur (Li‐S) batteries is plagued by the sluggish kinetics of interfacial Li(solvent) x + desolvation and successive redox conversions of sulfur species, exhibiting high tandem barriers. Herein, the tandem catalyst consisted of single Fe atom and Fe 3 C nanoparticles on porous carbon sheet (SAPTC@PCS) is initially proposed and developed. As illustrated in theoretical simulation, the neighboring Fe 3 C further tunes the electronic density and affects related coordination structure of atomically distributed iron for reinforcing catalytic efficiency. The as‐prepared SAPTC@PCS facilitates the dissociation of Li(solvent) x + to release more isolated Li + to participate in the subsequent polysulfide redox conversions by decreasing the desolvation/diffusion barriers, as revealed by in‐situ Raman, time‐of‐flight second ion mass spectroscopy, electronic microscope and X‐ray measurements. Consequently, the cell with SAPTC@PCS delivers a high capacity‐retention over 1000 cycles and high rate up to 3 C. Impressively, under the practical mass loading of 6 mg cm −2 , the cell stabilizes the capacity of 4.59 mAh cm −2 after 90 cycles, and a desirable capacity of 804.8 mAh g −1 after 100 cycles is achieved even being exposed to low temperature of 0 °C, demonstrating the feasibility of single atom‐particle catalysts for tandem catalysis in Li‐S batteries.