XO(X=Ti,Mn)decorated hollow multi-channel carbon sub-micro fiber networks as freestanding cathode for LieS batteries  

作　　者：Qianqian Wu Tianbao Yan Kunming Li Xuepeng Ni Fanlong Zeng Anqi Ju 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering,Donghua University,Shanghai,201620,China [2]Center for Civil Aviation Composites&Shanghai Collaborative Innovation Center of High-Performance Fibers and Composites(Province-Minitry Joint),Donghua University,Shanghai,201620,China

出　　处：《Journal of Materiomics》2023年第1期215-222,共8页无机材料学学报（英文）

基　　金：This work was supported by the Fundamental Research Funds for the Central Universities(No.22D110632);Open project of Shanghai Collaborative Innovation Center of High Performance Fibers and Composites(Province-Minitry Joint,No.X12812101/013);Key Support Project of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(No.21M1060212);Large Aircraft Special Fund of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(No.21M1060275).

摘　　要：Lithium-sulfur(Lisingle bondS)batteries are considered as one of the most promising high-energy storage devices due to the high theoretical capacity(1675 mA·h·g^(-1))and large energy density(2600 W·h·kg^(-1)).However,the poor conductivity of sulfur and“shuttle effect”of soluble polysulfide intermediates limit practical applications of Lisingle bondS batteries.Herein,four kinds of carbon sub-micro fibers with different structures were designed and prepared,the effect of structure on Lisingle bondS battery was studied.On this basis,the XO(X=Ti,Mn)decorated hollow multi-channel carbon sub-micro carbon fibers(HMCMFs)were prepared by electrospinning and carbonization.The HMCMFs can not only supply nanopores for relieving the expansion of sulfur but also served as high conductivity freestanding substrate for sulfur loading,meanwhile the decorated XO(X=Ti,Mn)can provide powerful chemical adsorption to polysulfide intermediates and limit“shuttle effect”Therefore,the TiO-HMCMFs/S composite shows high specific capacity of 900 mA·h·g^(-1)and maintain stable specific capacities up to∼600 mA·h·g^(-1)over 300 cycles at 0.1 A·g^(-1).This work offers a facile method to build efficient sulfur cathode to acquire Lisingle bondS batteries with high performance.

关 键 词：Lithium-sulfur batteries TiO MnO Carbon sub-miacro fibers 

分 类 号：TM912[电气工程—电力电子与电力传动]