文献类型：期刊文献

英文题名：Accelerating Li+ desolvation via symmetry-broken engineering of iron single-atom catalysts for high-performance lithium-sulfur batteries

作者：Zhou, Zhiqiang[1]; Cui, Lekang[1]; Wang, Jinxin[1]; Liu, Chuanlei[1]; Ma, Cheng[1]; Zhang, Yongzheng[1]; Wang, Jitong[1,2]; Zhang, Yayun[1]; Qiao, Wenming[1]; Ling, Licheng[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China

年份：2025

卷号：698

外文期刊名：Journal of Colloid and Interface Science

收录：EI(收录号：20252418596742)

语种：英文

外文关键词：Decay (organic) - Electrolytic cells - High temperature engineering - Lithium-ion batteries - Redox reactions - Sulfur compounds

摘要：High-energy–density lithium-sulfur (Li-S) batteries are hindered by the detrimental shuttle effect and sluggish redox conversion kinetics of lithium polysulfides (LiPSs) arising from the high energy barrier of Li+ diffusion kinetics at the electrode/electrolyte interface. Herein, the asymmetrically N,S co-coordinated atomic Fe sites (FeSAC-NS) are synthesized to present a strong interaction with Li+ based on the typical symmetry-broken electron redistribution. Comprehensive electrochemical and theoretical results reveal that FeSAC-NS as an efficient Li+ power pump could kinetically accelerate the dissociation of Li+ solvation structure and enhance the Li+ diffusion kinetics via the N-Fe-S active structure, further improving the bidirectional sulfur species redox electrochemistry. Encouraged by the FeSAC-NS catalytic promoter, the constructed Li-S batteries delivered an exceptional rate performance of 767 mAh g?1 at 5 C and a high cyclic stability of 0.034% decaying rate over 700 cycles at 1 C. Even at a low temperature of 0 °C, the FeSAC-NS-based cells exhibited a low decay rate of 0.056% per cycle over 350 cycles at 0.5 C. This work provides a deep insight into the underlying mechanism of Li+ desolvation behavior facilitated by symmetry-broken atomic Fe sites. ? 2025