Highly Conductive Quasi-1D Hexagonal Chalcogenide Perovskite Sr8Ti7S21 with Efficient Polysulfide Regulation in Lithium-Sulfur Batteries
Yang, Dawei (Henan University)
Han, Yanbing (Zhengzhou University)
Li, Mengyao (Zhengzhou University)
Li, Canhuang (Universitat de Barcelona. Departament de Química)
Bi, Wei (Henan University)
Gong, Qianhong (Henan University)
Zhang, Jie (Henan University)
Zhang, Jinglu (Zhengzhou University)
Zhou, Yingtang (Zhejiang Ocean University)
Gao, Han (Zhengzhou University)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Shi, Zhifeng (Zhengzhou University)
Zhou, Guangmin (Tsinghua University)
Cabot i Codina, Andreu (Institució Catalana de Recerca i Estudis Avançats)

Date:	2024
Abstract:	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.
Grants:	Agencia Estatal de Investigación ENE2016-77798-C4-3-R Agencia Estatal de Investigación PID2020-116093RB-C43 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 Ministerio de Ciencia e Innovación CEX2021-001214-S
Note:	Altres ajuts: European Union NextGenerationEU (PRTR-C17.I1); CERCA Programme/Generalitat de Catalunya
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Quasi-1D chalcogenide perovskite ; Sr8Ti7S21 ; Lithium polysulfides ; Catalytic conversion ; Lithium-sulfur batteries
Published in:	Advanced functional materials, Vol. 34, Issue 42 (October 2024) , art. 2401577, ISSN 1616-3028

DOI: 10.1002/adfm.202401577

Preprint 21 p, 2.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
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Articles > Published articles