摘要
锂硫电池因其能量密度高、原料丰富和价格低廉等优势而被认为是下一代的重要储能器件。但是,锂硫电池的发展仍面临诸多问题,包括多硫化物的穿梭效应、单质硫的导电性差、充电过程中硫体积膨胀导致的库仑效率差、容量快速衰减以及锂负极的腐蚀等。近年来,金属氧化物由于具有可吸附多硫化物、提高多硫化物之间的相互转化能力、形成3D形态纳米级结构及对主体材料与多硫化物之间的结合能发挥着关键作用等优点在锂硫电池正极材料的改性方面得到广泛应用。本文综述了多类金属氧化物(过渡金属氧化物、二元及多元金属氧化物、其他金属氧化物)在锂硫电池正极复合材料改性中的研究进展,并对金属氧化物在锂硫电池中的应用前景进行了展望。
Lithium-sulfur batteries are considered to be the next generation of energy storage devices due to their high energy density,abundant raw materials and low price. However,the development of lithium-sulfur batteries still faces many problems,including the shuttle effect of polysulfide,the poor conductivity of elemental sulfur,the poor coulombic efficiency caused by sulfur volume expansion during charging,the rapid decay of capacity and the corrosion of lithium anode. In recent years,metal oxides have been widely used in the modification of positive electrodes of lithium-sulfur batteries because of their ability to adsorb polysulfides,improving the mutual conversion ability between polysulfides,forming nanoscale structure with a 3 D morphology,and playing a key role in the combination of host material and polysulfide. In this paper,the research progress in various metal oxides( transition metal oxides,binary and multi-metal oxides,other metal oxides) for the modification of lithium-sulfur battery cathode composites is reviewed. The application prospect of metal oxides in lithium-sulfur batteries is prospected.
作者
惠鹏
杨蓉
邓七九
燕映霖
许云华
Hui Peng;Yang Rong;Deng Qijiu;Yan Yinglin;Xu Yunhua(International Research Center for Composite and Intelligent Manufacturing Technology,Institute of Chemical Power Sources,Xi'an University of Technology,Xi'an 710048;Yulin University,Yulin 719000)
出处
《化学通报》
CAS
CSCD
北大核心
2019年第11期982-988,共7页
Chemistry
基金
陕西省自然科学基金项目(2019JQ-730)
中国博士后基金项目(2018M633544,2019M653706)
陕西省博士后科研项目(2018BSHEDZZ120)
西安理工大学博士启动基金项目(101-451117007)
国家国际科技合作专项项目(2015DFR50350)
国家自然科学基金项目(51702256)
陕西省科技厅创新人才推进计划-科技创新团队项目(2019TD-019)资助
关键词
锂硫电池
金属氧化物
正极复合材料
电化学
储能机制
Lithium-sulfur battery
Metal oxide
Cathode composite
Electrochemistry
Energy storage mechanism
