碳纳米管/宣纸夹层对锂硫电池性能的影响  

Influence of carbon nanotube/rice paper interlayer on performance of lithium-sulfur battery

作　　者：何声太[1] 闫晨宇 HE Sheng-tai;YAN Chen-yu(Tianjin Key Laboratory of Advanced Fibers and Energy Storage,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学天津市先进纤维与储能技术重点实验室,天津300387

出　　处：《天津工业大学学报》2020年第2期15-19,共5页Journal of Tiangong University

基　　金：国家重大科学研究计划资助项目(2012CB933301)。

摘　　要：为减少锂硫电池的穿梭效应以提高其电化学性能,使用喷涂法制备用于锂硫电池的碳纳米管/宣纸夹层,利用其吸附性能来控制多硫化物的穿梭效应;并将该夹层应用于锂硫电池,研究不同碳纳米管负载量的夹层对于锂硫电池性能的影响。结果表明:碳纳米管均匀地包覆在宣纸纤维的外侧;夹层中碳纳米管负载量为0.8 mg/cm^2时,在0.1 C下首圈容量为1236.3 mA·h/g,在0.5 C循环100圈后,其仍能保持451.7 mA·h/g的比容量,高于其他碳纳米管负载量的锂硫电池;在1.0 C的高倍率下,该锂硫电池仍具有稳定的电化学性能。In order to reduce the shuttle effect of the lithium-sulfur battery to improve its electrochemical performance,carbon nanotube/rice paper interlayer of lithium-sulfur battery was prepared with spraying method to control the shuttle effect of polysulfide by the adsorption of interlayer.The interlayer was applied to the lithium-sulfur battery,and the effect of interlayer with different carbon nanotube contents on the performance of lithium-sulfur batteries has been studied.The results show that the carbon nanotubes are uniformly coated on the outside of the rice paper fibers.When the content of carbon nanotubes is 0.8 mg/cm^2,the first cycle capacity of the lithium-sulfur battery at 0.1 C is 1236.3 mA·h/g.After 100 cycles at 0.5 C,the specific capacity of the lithiumsulfur battery remains 451.7 mA·h/g,which is higher than that of the lithium-sulfur battery with other contents.At a high rate of 1.0 C,the lithium-sulfur battery with the interlayer still has stable electrochemical performance.

关 键 词：碳纳米管 宣纸 夹层 锂硫电池 穿梭效应 电化学性能 

分 类 号：TQ152[化学工程—电化学工业]