Abstract
Lithium-sulfur(Li-S)batteries are considered one of the most promising next-generation secondary bat-teries owing to their ultrahigh theoretical energy density.However,practical applications are hindered by the shuttle effect of soluble lithium polysulfides(LiPSs)and sluggish redox kinetics,which result in low active material utilization and poor cycling stability.Various copper-based materials have been used to inhibit the shuttle effect of LiPSs,owing to the strong anchoring effect caused by the lithio-philic/sulphilic sites and the accelerated conversion kinetics caused by excellent catalytic activity.This study briefly introduces the working principles of Li-S batteries,followed by a summary of the synthetic methods for copper-based materials.Moreover,the recent research progress in the utilization of various copper-based materials in cathodes and separators of Li-S batteries,including copper oxides,copper sul-fides,copper phosphides,copper selenides,copper-based metal-organic frameworks(MOFs),and copper single-atom,are systematically summarized.Subsequently,three strategies to improve the electrochemi-cal performance of copper-based materials through defect engineering,morphology regulation,and syn-ergistic effect of different components are presented.Finally,our perspectives on the future development of copper-based materials are presented,highlighting the major challenges in the rational design and synthesis of high-performance Li-S batteries.
维普
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