DataVXAdvanced Functional MaterialsPaper
journal article·2024-10Open access

Highly Conductive Quasi‐1D Hexagonal Chalcogenide Perovskite Sr 8 Ti 7 S 21 with Efficient Polysulfide Regulation in Lithium‐Sulfur Batteries

Dawei Yang, Yanbing Han, Mengyao Li, Canhuang Li, Wei Bi, Qianhong Gong, Jie Zhang, Jinglu Zhang, Yingtang Zhou, Han Gao, Jordi Arbiol, Zhifeng Shi, Guangmin Zhou, Andreu Cabot

Advanced Functional Materials· Volume 34· Issue 42
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Source abstract

Abstract

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, Sr 8 Ti 7 S 21 , is demonstrated as an efficient sulfur host able to overcome these limitations. Experimental results and density functional theory calculations show Sr 8 Ti 7 S 21 to offer strong lithium polysulfides (LiPS) binding through multiple bond formation. Besides, Sr 8 Ti 7 S 21 effectively facilitates the kinetics of the LiPS redox reaction. As a result, S@Sr 8 Ti 7 S 21 ‐based cathodes exhibit excellent initial capacities up to 1315 mAh g −1 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 −2 under a high sulfur loading of 6.5 mg cm −2 . This work reveals the potential capabilities and promising prospects of chalcogenide perovskites in advancing LSBs technology.
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Research context

Energy storageElectronic materials

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Henan Province Key Laboratory of Photovoltaic Materials School of Future Technology Henan University Kaifeng 475004 P. R. China

Key Laboratory of Materials Physics of Ministry of Education School of Physics and Microelectronics Zhengzhou University Daxue Road 75 Zhengzhou 450052 P. R. China

Department of Chemistry Universitat de Barcelona Barcelona 08028 Spain

Catalonia Institute for Energy Research – IREC Sant Adrià de Besòs Barcelona 08930 Spain

National Engineering Research Center for Marine Aquaculture Marine Science and Technology College Zhejiang Ocean University Zhoushan Zhejiang Province 316004 China

Catalan Institute of Nanoscience and Nanotechnology (ICN2) Campus UAB, Bellaterra Barcelona Catalonia 08193 Spain

ICREA Pg. Lluís Companys 23 Barcelona 08010 Spain

Tsinghua‐Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P. R. China

Funding

National Natural Science Foundation of China · Generalitat de Catalunya

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