CNTs@Fe_(2)O_(3)材料的构筑及其对锂硫电池性能的影响  

Construction of CNTs@Fe_(2)O_(3) Materials and Their Effects on the Performance of Lithium Sulfur Batteries

作　　者：胡章涛 望军[1] 郑毅 杨森 张瀚 HU Zhangtao;WANG Jun;ZHENG Yi;YANG Sen;ZHANG Han(School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《重庆科技学院学报（自然科学版）》2024年第2期88-93,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金青年项目“锂硫电池正极载体材料的构筑及其对放电过程的分段控制机制”(52107223);重庆科技学院研究生创新计划项目“CNTs@Fe2O3材料的构筑及其对锂硫电池电极反应过程的控制机理”(YKJCX2220231)。

摘　　要：锂硫电池作为一种新型锂电池,具有高能量密度和低成本等优势,但硫正极在循环过程中性能退化的问题仍有待解决。为此,制备了一种用Fe2O3修饰的碳纳米管(CNTs@Fe_(2)O_(3))作为载硫体。碳纳米管独特的中空结构能够有效应对体积膨胀效应,同时,生长在碳纳米管表面的Fe2O3颗粒能够有效吸附多硫化锂,从而抑制多硫化锂的穿梭;碳纳米管的长程导电结构能够提高难溶性多硫化锂沉积后的正极导电性。Lithium sulfur batteries,as a new type of lithium battery,have advantages of high energy density and low cost,but the performance degradation of sulfur positive electrodes during cycling is still a problem to be solved.To this end,an Fe_(2)O_(3)modified carbon nanotubes(CNTs@Fe_(2)O_(3))were prepared as a sulfur carrier.The unique hol-low structure of carbon nanotubes can effectively cope with the volume expansion effect,while the Fe_(2)O_(3) particles grown on the surface of carbon nanotubes can effectively adsorb lithium polysulfide and thus inhibit lithium polysul-fide shuttling,and the long-range conductive structure of the carbon nanotubes can improve the electrical conduc-tivity of the positive electrode after the deposition of insoluble lithium polysulfide.

关 键 词：锂硫电池 碳纳米管 氧化铁 正极材料 载硫体 

分 类 号：TM912[电气工程—电力电子与电力传动]