Recent Advances and Prospects of Chalcogenide Cathodes for Rechargeable Magnesium Batteries

• Published in: Advanced functional materials 2024-10, Vol.34 (40), p.n/a
• Main Authors: Liu, Yuehao, Qu, Baihua, Li, Shengyang, Lian, Xiaojin, Luo, Yuanyi, Shen, Xing, Xu, Chaohe, Wang, Jingfeng, Pan, Fusheng
• Format: Article
• Language: English
• Subjects: Cathodes; chalcogenide cathodes; Chalcogenides; Charge density; conversion‐type; Crystal defects; Crystal lattices; Crystal structure; Diffusion barriers; Electrochemical analysis; Electrode materials; Engineering; Intercalation; intercalation‐type; Ion diffusion; Low conductivity; Magnesium; modification strategies; rechargeable magnesium batteries; Taxonomy
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202405586

Rechargeable magnesium batteries (RMBs) have garnered considerable interest from researchers and industries owing to their abundant resources, cost‐effectiveness, impressive energy density, and safety features, positioning them as a compelling technology for sustainable energy. Chalcogenides, with their high electrochemical activity and low charge density, facilitate the diffusion and migration of Mg2+. “Soft” anionic lattices, such as S or Se, weaken the Coulombic attraction between the crystal structure and Mg2+, thereby promoting the accelerated diffusion and reversible intercalation of Mg2+. Consequently, they are highly regarded as promising cathode materials for RMBs. However, their real‐world implementation is hindered by challenges including low conductivity, formidable ion diffusion barriers, and insufficient cyclic stability. In this study, chalcogenides are categorized into intercalation‐ and conversion‐types based on the Mg2+ storage mechanism, providing a comprehensive examination and taxonomy of various modification approaches aimed at enhancing the electrochemical performance of chalcogenides. These approaches include intercalation engineering, phase engineering, defect engineering, doping effects, and nanostructure engineering. Furthermore, specific modification strategies for certain chalcogenide cathode materials are summarized and discussed. Finally, the key points of optimization strategies for chalcogenide cathode materials are summarized, along with the proposed future breakthrough directions. Chalcogenide materials has great potential in rechargeable magnesium batteries (RMBs). This paper comprehensively reviews various modification strategies, including intercalation engineering, phase engineering, defect engineering, doping effects, hybridization strategies, and nanostructure engineering. Furthermore, the review summarizes and forecasts the development prospects of these modification strategies and the cathode‐electrolyte interface, providing guidance and references for future research and applications in RMBs cathode materials.