摘要
设计了以Fe_(3)O_(4)修饰的碳纳米管(Fe_(3)O_(4)@CNT)作为硫的载体以提高锂-硫(Li-S)电池的电化学性能.碳纳米管由于具有优越的导电性,可以改善S及其放电产物的电导率,为电子和离子的传输提供高速通道.极性Fe_(3)O_(4)对多硫化物具有强的吸附作用,能够有效抑制Li-S电池中多硫化物的穿梭效应,Fe_(3)O_(4)@CNT/S正极展现出了优越的电化学特性.
Ferric tetroxide decorated carbon nanotubes (Fe_(3)O_(4)@CNT) were designed as a sulfur host to improve the electrochemical performance of Li-S batteries.In such a positive electrode structure,carbon nanotubes could improve the low conductivity of sulfur and its discharge products as well as providing a high-speed electron and ion channel because of the superior electrical conductivity.Polar Fe_(3)O_(4)had a strong adsorption effect with polysulfide,which could effectively inhibit the shuttle effect caused by the diffusion of polysulfide to the negative electrode.As a result,the Fe_(3)O_(4)@CNT/S electrode exhibited superior electrochemical properties for high performance lithium sulfur batteries.
作者
程璞
刘德全
贺德衍
CHENG Pu;LIU De-quan;HE De-yan(Key Laboratory for Magnetism and Magnetic Materials with the Ministry of Education,School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China)
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第6期838-843,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(11674138)
中央高校基本科研业务费专项资金项目(lzujbky-2020-cd02)。
