Operando Observation of Inter‐Particle Li <sup>+</sup> Transport in Layered Bimetallic Sulfides for High‐Rate Lithium‐Sulfur Batteries
Abstract
ABSTRACT The slow reaction kinetics, particularly at high rates, hinder the practical use of lithium‐sulfur batteries (LSBs). To overcome the inadequate ion transport in conventional electrodes, a two‐dimensional layered bimetallic sulfide (FeMo 2 S 4 ) as a sulfur host, creating fast ion‐conduction pathways is developed. Using a free‐standing FeMo 2 S 4 /carbon cloth cathode with a Li 2 S 6 catholyte, high‐rate performance is achieved. Crucially, in situ high‐resolution TEM directly visualized rapid inter‐particle lithium ion transport between the layered FeMo 2 S 4 flakes, offering direct evidence of enhanced kinetics. This phenomenon, combined with strong polysulfide adsorption and high catalytic activity, boosts reaction rates. The Li 2 S 6 ‐based battery delivered a high initial capacity of 1516 mAh g − 1 and outstanding stability with only 0.028% decay per cycle at 3C. This work highlights the effectiveness of layered hosts with fast ion channels and bimetallic catalysis for durable, high‐rate LSBs.
Article Details
Authors (21)
Lei Chen
Kaizhi Chen
Institute of Energy Materials Science (IEMS) University of Shanghai for Science and Technology Shanghai P. R. China
Jing Yu
Institute for Digital Molecular Analytics and Science (IDMxS), Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
Dawei Yang
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Quantum Information Future Technology
Yunxiao Wang
Canhuang Li
Catalonia Institute for Energy Research-IREC, Sant Adrià de Besòs, Barcelona 08930, Spain
Yao‐Jie Lei
Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW Australia
Jie Zhang
Jirong Mou
School of Physics and Electronics Gannan Normal University Ganzhou P. R. China
Qianhong Gong
Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Quantum Information Future Technology Henan University Kaifeng P. R. China
Wei Bi
School of Materials and Chemistry
Chao Yuan
Department of Preventive Dentistry
Zhenyu Xiao
Ligang Xu
Jiefeng Diao
Department of Chemistry
Mingxue Tang
Center for High Pressure Science and Technology Advanced Research
Graeme Henkelman
Jordi Arbiol
Catalan Institute of Nanoscience and Nanotechnology − ICN2 (CSIC and BIST), Campus UAB, Bellaterra, Barcelona, Catalonia 08193, Spain
Guangmin Zhou
Andreu Cabot
Catalonia Institute for Energy Research-IREC, Sant Adrià de Besòs, Barcelona 08930, Spain
Wei‐Hong Lai
Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials Fudan University Shanghai P. R. China