V2O5空心球作为高效硫载体用于锂硫电池（英文）  

V2O5 Hollow Spheres as High Efficient Sulfur Host for Li-S Batteries

作　　者：潘沛锋 陈平[1] 方亚男 单淇 陈宁娜[1] 冯晓苗[1] 刘瑞卿[1] 李盼[1] 马延文[1] PAN Pei-Feng;CHEN Ping;FANG Ya-Nan;SHAN Qi;CHEN Ning-Na;FENG Xiao-Miao;LIU Rui-Qing;LI Pan;MA Yan-Wen(Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Synergistic Innovation Center forOrganic Electronics and Information Displays,Nanjing University of Posts&Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学,有机电子与信息显示国家重点实验室培育基地,先进材料研究院(IAM),有机电子与信息显示协同创新中心

出　　处：《无机化学学报》2020年第3期575-583,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51772157,21805140,61504062);江苏省省自然科学基金(No.BK20150863,BK20160890);江苏省六大人才高峰(No.2015-JY-015)资助项目

摘　　要：以V2O5空心球作为锂硫电池的正极材料,将其用于存储硫和限制多硫化物的穿梭效应。V2O5空心球的平均直径约为500 nm,为存储硫提供了更多空间并适应硫电极的体积变化。同时,V2O5对多硫化物具有很强的化学吸附性,可以有效地限制多硫化物的穿梭效应。由于中空结构增加了硫的存储,并通过化学键牢固地吸附多硫化物,使该锂硫电池同时具有高容量和良好的稳定性。V2O5/S作为正极的锂硫电池在0.1C倍率时显示出1439 mAh·g-1的高可逆容量,并在1C的倍率下循环300次后的容量约为600 mAh·g-1。The V2O5 hollow spheres were used as a high efficient sulfur host for Li-S batteries,which was used for the storage of sulfur and restricting the shuttle effect of polysulfides.The hollow spheres had an average diameter around 500 nm,providing more space for storing sulfur,accommodating volumetric change of sulfur electrode.At the same time,V2O5 has a strong chemical adsorption of polysulfides,which can effectively limit the shuttle effect of polysulfides.The high capacity and excellent stability of Li-S batteries have been realized simultaneously due to the increasing of the storage of sulfur by the hollow structure and strong chemical adsorption for polysulfides by chemical bonding.The Li-S batteries with as-prepared V2O5/S cathode showed a high reversible capacity of 1439 mAh·g-1 at 0.1C and stable cycling performance with a capacity of^600 mAh·g-1 after 300 cycles at 1C.

关 键 词：锂硫电池 V2O5空心球 正极 穿梭效应 化学吸附 

分 类 号：TB34[一般工业技术—材料科学与工程]