科研之友
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摘要
Lithium-sulfur (Li-S) batteries, which possess high theoretical energy density, are extremely potential candidates for next-generation energy storage devices. However, the barriers of low conductivity for sulfur, shuttle effect of polysulfides, volume expansion of sulfur during the charging/discharging process, and uncontrollable dendrites growth, hinder the real-world applications of Li-S batteries. Various advanced materials and strategies have been developed to overcome the above-mentioned problems. MXenes, as one of the emerging family of twodimensional (2D) materials with laminar structure, admirable conductivity, excellent hydrophilicity, and tunable surface chemistry, have also been used to surmount these challenges. It has been found that MXene-based materials are generally employed as the substrates for sulfur hosts and interlayers between cathode and separator due to their satisfactory conductivity, strong adsorbability toward polysulfides, and catalytic effect for the conversion of polysulfides. Additionally, MXene-based materials with the ability to well regulate the lithium deposition behavior, are widely utilized to modify the lithium anode. To further facilitate effective and targetoriented research on MXene-based materials for advanced Li-S batteries, a comprehensive summary of recent research progress is urgently needed. Herein, recent research progress in MXene-based materials for Li-S batteries is summarized, from the perspectives of synthesis, structure and properties, and the state-of-the-art progress for Li-S batteries. Finally, the challenges and perspectives for the MXene-based materials for the future development of advanced Li-S batteries have also been proposed.
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单位惠州学院
