Wide-Temperature-Range Li–S Batteries Enabled by Thiodimolybdate [Mo2S12]2– as a Dual-Function Molecular Catalyst for Polysulfide Redox and Lithium Intercalation
Source abstract
Abstract
In lithium–sulfur batteries, a serious obstacle is the dissolution and diffusion of long-chain polysulfides, resulting in rapid capacity decay and low Coulombic efficiency. At present, a common practice is designing cathode materials to solve this problem, but this gives rise to reduced gravimetric and volumetric energy densities. Herein, we present a thiodimolybdate [Mo2S12]2– cluster as sulfur host material that can effectively confine the shuttling of polysulfides and contribute its own capacity in Li–S cells. Moreover, the [Mo2S12]2– cluster as a “bidirectional catalyst” can effectively catalyze polysulfide reduction and lithium sulfide oxidation. We further investigate the catalytic mechanism of [Mo2S12]2– clusters by theoretical calculations, in situ spectroscopic techniques, and electrochemical studies. The (NH4)2Mo2S12/S cathodes show good electrochemical performance under a wide range of temperatures. In addition, a pouch cell fabricated with (NH4)2Mo2S12/S cathodes maintains a stable output for more than 50 cycles.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, P.R. China
Pylon Battery Co., LTD, Yangzhou, 225002 Jiangsu, P.R. China
School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013 Jiangsu, P.R. China
Funding
Central University Basic Research Fund of China · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Top-notch Academic Programs Project of Jiangsu Higher Education Institutions · Yangzhou University Interdisciplinary Research Foundation for Chemistry Discipline of Targeted Support · Postgraduate Research and Practice Innovation Program of Jiangsu Province · High-Level Entrepreneurial and Innovative Talents Program of Jiangsu · LvYangJinFeng Talent Program of Yangzhou
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