Highly Conductive Quasi-1D Hexagonal Chalcogenide Perovskite Sr8Ti7S21 with Efficient Polysulfide Regulation in Lithium-Sulfur Batteries

Lithium-sulfur batteries (LSBs) are regarded as one of the most promising candidates for next-generation energy storage systems. However, the commercialization of LSBs is still hindered by several technical issues, including the notorious polysulfide migration from the cathode to the anode and the s...

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Detalles Bibliográficos
Autores: Yang, Dawei|||0000-0002-3842-8286, Han, Yanbing, Li, Mengyao|||0000-0002-9082-7938, Li, Canhuang, Bi, Wei, Gong, Qianhong, Zhang, Jie, Zhang, Jinglu, Zhou, Yingtang|||0000-0002-8678-295X, Gao, Han, Arbiol i Cobos, Jordi|||0000-0002-0695-1726, Shi, Zhifeng, Zhou, Guangmin|||0000-0002-3629-5686, Cabot i Codina, Andreu|||0000-0002-7533-3251
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:302103
Acceso en línea:https://ddd.uab.cat/record/302103
https://dx.doi.org/urn:doi:10.1002/adfm.202401577
Access Level:acceso abierto
Palabra clave:Quasi-1D chalcogenide perovskite
Sr8Ti7S21
Lithium polysulfides
Catalytic conversion
Lithium-sulfur batteries
Descripción
Sumario:Lithium-sulfur batteries (LSBs) are regarded as one of the most promising candidates for next-generation energy storage systems. However, the commercialization of LSBs is still hindered by several technical issues, including the notorious polysulfide migration from the cathode to the anode and the sluggish sulfur conversion kinetics. Herein, a quasi-1D hexagonal chalcogenide perovskite, SrTiS, is demonstrated as an efficient sulfur host able to overcome these limitations. Experimental results and density functional theory calculations show SrTiS to offer strong lithium polysulfides (LiPS) binding through multiple bond formation. Besides, SrTiS effectively facilitates the kinetics of the LiPS redox reaction. As a result, S@SrTiS-based cathodes exhibit excellent initial capacities up to 1315 mAh g at 0.2C, impressive cycling stability with an average capacity decay rate of 0.08% per cycle over 400 cycles at 1C, and a high areal capacity of 6.58 mAh cm under a high sulfur loading of 6.5 mg cm. This work reveals the potential capabilities and promising prospects of chalcogenide perovskites in advancing LSBs technology.

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