Preparation of MXene Modified by Vanadium Ion and Their Application in Lithium-Sulfur Batteries
The MXene(MX)sheet obtained by chemical etching has a large number of anionic functional groups.Based on the spray drying technology,the MXene modified by vanadium ion(MX-VN)material was designed and synthesized for the cathode of lithium-sulfur batteries(LSBs).The excellent conductivity of MXene could improve the overall conductivity of the sulfur cathode.At the same time,the in-situ constructed MX-VN interface could improve the adsorption effect and catalytic ability of polysulfides,meanwhile improve the utilization rate of sulfur.The experimental results showed that the discharge capacity of the LSBs with MX-VN/S as the cathode was as high as 1438 mAh/g at 0.1 C,and the capacity retention rate was as high as 77.5%after 200 cycles at 0.5 C.The performance of the battery was significantly improved.
国家科技期刊平台
NSTL
万方数据
