锂电池硫硒正极材料的研究进展
摘要：摘要锂硫电池的能量密度高,原料价格低廉,具有成本优势,是一种最具潜力的二次电池之一。然而受限于硫正极的低导电性以及多硫化物溶解导致的循环寿命衰减等因素,锂硫电池仍不能得到很好的商业化应用。作为硫的同主族元素,硒具有良好的电导率和可观的体积容量。结合了硫和硒的优点,硫硒固溶体（SexSy）引起了人们的极大关注。SexSy的导电性好、比容量高,但仍然存在穿梭效应、电解液匹配性和循环过程中体积变化大等问题。本文分析了近期锂电池SexSy基正极材料的研究现状,主要总结了碳材料、金属化合物、金属-有机框架和杂原子掺杂材料四个方面的相关研究进展,介绍了本课题组在SexSy基正极材料方面的部分研究成果,并对锂-硫/硒电池的未来发展前景进行了展望。
Abstract:：Lithium-sulfur battery has become one of the most potential secondary batteries because of its high energy density, low cost of raw materials. Unfortunately, its practical application has been hindered by serous technical challenges, such as the low conductivity of sulfur, and unsatisfying long-term cycling stability related with the dissolution of intermediate lithium polysulfide (LiPS) into the electrolyte over cycling. Selenium, the main group element of sulfur, has good conductivity and high volume capacity. By combining the advantages of sulfur and selenium, the solid solution of sulfur and selenium (SexSy) has attracted great attention as active material for lithium-sulfur batteries, owing to its enhanced conductivity and high specific capacity of SexSy. However, some problems such as shuttle effect, electrolyte matching and large volume change over cycling still challenge its practical application for SexSy. In this paper, the recent research progress of cathode materials with SexSy for lithium battery was reviewed. The carbon framework materials, metal compounds, metal organic framework materials and heteroatom doping materials were specifically summarized. Some of our recent progresses on the development of cathode materials for lithium-sulfur/selenium batteries were also introduced. At last, some conclusion and prospects for developing high-performance cathode materials for lithium-sulfur/selenium batteries were presented.
中文标题：锂电池硫硒正极材料的研究进展
英文标题：Progress on Sulfur/Selenium Cathode Materials for Lithium Batteries
发表时间：2020-03-16
作者：
王彪, 胡金龙, 任逸伦, 张灵志
作者简介：
作者简介：王 彪（1995-）,男,硕士研究生,主要从事锂电池硫/硒正极材料的设计和研究。张灵志（1969-）,男,博士,研究员,博士生导师,中国科学院百人计划引进国外杰出人才,主要从事有机光电材料和纳米材料方面的设计合成及其在各种能量储存转化器件方面的应用研究。
关键词：锂电池,硫/硒正极,能量密度,
Key words：lithium battery,sulfur/selenium cathode,energy density,
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