Amorphous High Entropy Alloy Nanosheets Enabling Robust Li–S Batteries
He R. Lee S. Ding Y. Huang C. Lu X. Zheng L. Yu A. Zhang C. Li C. Bi X. Li Y. Liao Y. Li J. Ostovari Moghaddam A. Yernar S. Xu Y. Ibáñez M. Zhang C. Yang L. Zhou Y. Cabot A.
15 January 2026John Wiley and Sons Inc
Advanced Functional Materials
2026#36Issue 5
High-entropy alloys (HEAs) show great potential for catalyzing complex multi-step reactions, but optimizing their parameters, i.e., composition, but also their crystallinity and morphology, remains a significant challenge. In this study, FeCoNiMoW HEAs are synthesized into either amorphous nanosheets (HEANS) or crystalline nanoparticles (HEANP), which are then used to catalyze the lithium–sulfur (Li–S) reaction of Li–S batteries (LSBs). Evaluations in symmetric cells, coin cells, and pouch cells reveal that HEANS significantly enhance LSB performance, achieving initial discharge capacities up to 1632 mAh g−1. The batteries also exhibit excellent cycling stability over 1000 cycles at 3Cand maintain high-rate performance up to 10C with a capacity of 614 mAh g−1. Comprehensive in situ analyses and density functional theory calculations demonstrate that amorphous HEANS provide more active sites, better ionic conductivity and stronger chemical interactions with lithium polysulfides (LiPS). These properties effectively suppress the shuttle effect, promote the complete S8 → Li2S conversion by reducing the impedance of the solid-electrolyte interphase, and accelerate the Li2S4 → Li2S2 step by lowering the nucleation energy barrier. Overall, this study highlights the superior catalytic properties of amorphous 2D HEAs in LSBs and offers new insights into the mechanisms of LiPS conversion.
amorphous , high entropy alloy , in situ electrochemical impedance spectroscopy , in situ Raman , Li–S batteries
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Catalonia Institute for Energy Research – IREC, Sant Adrià de Besòs, Barcelona, 08930, Spain
Universitat de Barcelona, Barcelona, 08028, Spain
Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg, 3400, Austria
Hebei Key Lab of Optic-electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding, 071002, China
Universitat Politècnica de Catalunya, Campus Diagonal Sud, Edificio PC (Pavelló C). Av. Diagonal, 647, Barcelona, 08028, Spain
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
Fuzhou University, Fujian, Fuzhou, 350116, China
State Key Laboratory of Material Processing and Die and Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
Institute of Advanced Study, Chengdu University, Chengdu, 610106, China
Tikhonov Moscow Institute of Electronics and Mathematics, HSE University, Moscow, 101000, Russian Federation
Al-Farabi Kazakh National University, Faculty of Physics and Technology, Department of Plasma Physics, Almaty, 050040, Kazakhstan
Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, National Engineering Research Center for Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhejiang Province, Zhoushan, 316004, China
ICREA, Pg. Lluis Companys 23, Catalonia, Barcelona, 08010, Spain
Catalonia Institute for Energy Research – IREC
Universitat de Barcelona
Institute of Science and Technology Austria (ISTA)
Hebei Key Lab of Optic-electronic Information and Materials
Universitat Politècnica de Catalunya
Institute of High Energy Physics
Fuzhou University
State Key Laboratory of Material Processing and Die and Mold Technology
Institute of Advanced Study
Tikhonov Moscow Institute of Electronics and Mathematics
Al-Farabi Kazakh National University
Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control
ICREA
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