MXene在锂硫电池中应用的研究进展

Research Progress of MXene Used in Lithium Sulfur Battery

MXene是一种新兴的二维过渡金属碳化物或碳氮化物,优异的金属导电性、丰富的表面官能团和超薄二维结构使其在电化学储能方面的应用有巨大的潜力。锂硫电池的理论比容量较高,在新一代储能器件中极具竞争力。二维MXene及其组装的三维材料作为一种先进的硫载体可通过多种途径克服锂硫电池固有的导电性差和放电产物溶解严重的问题。本文综述了目前二维和三维结构的MXene材料在锂硫电池中的应用,分析了性能与结构之间的关系,总结了目前存在的挑战和困难并对未来的设计方向提出一些看法。

As an emerging two-dimensional transition metal carbide or carbonitride,MXene exhibits excellent metallic conductivity,abundant surface functional groups and ultrathin two-dimensional structure,which endows it great potential in electrochemical energy storage.Lithium-sulfur batteries have a high theoretical specific capacity and become a very competitive choice in the new generation of energy storage devices.Two-dimensional MXenes and the assembled three-dimensional materials,as advanced sulfur carriers,can effectively improve the inherent poor conductivity and serious dissolution of discharge products of lithium-sulfur batteries.This paper reviews the current applications of MXene materials with two-dimensional and three-dimensional structures in lithium-sulfur batteries,analyzes the relationship between different structures and performance,summarizes the current challenges and difficulties,and gives a view on the direction to proceed for future designs.