Ti₃C₂ (MXene) #8211; S锂硫电池复合正极的制备和电化学性能

南京工业大学材料科学与工程学院 涂柯俊

摘 要:

目前市场上的锂离子电池，由于其理论比容量大小受限而很难满足社会发展的要求。但Li-S电池其理论比容量高达1675 mA#903;h/g，理论能量密度高达2600W/kg，使Li-S电池成为最具发展前景的二次电池体系之一。本文综述了锂硫电池的工作原理、存在的问题以及正极材料的研究现状、简要介绍了新型二维过渡金属MXene的性能及其应用，最后分析了本课题的研究意义。

关键词：锂硫电池 MXene 正极材料 综述

ABSTRACT

Nowadays, lithium batteries are difficult to meet the requirements of the development of society due to their limited theoretical capacity. However, Li-S batteries#8217; theoretical capacity can reach 1675 mAh / g with sulfur as their positive electrode, and the theoretical energy density of Li-S batteries can reach 2,600 W / kg, which makes Li- S batteries to become one of the most promising secondary battery system. In this paper, the working principle and problems of the lithium-sulfur battery and the research status of the cathode materials are reviewed. The performance and application of the new two-dimensional transition metal MXene are briefly introduced. Finally, the significance of the study is analyzed.

Keyword: Lithium-sulfur batteries； MXene； cathode materials；review