TiO_(2)-carbon porous nanostructures for immobilization and conversion of polysulfides

作     者：Keke Gao Rui Xu Yunxiang Chen Zongtao Zhang Jiashuo Shao Haipeng Ji Liying Zhang Shasha Yi Deliang Chen Junhua Hu Yanfeng Gao Keke Gao;Rui Xu;Yunxiang Chen;Zongtao Zhang;Jiashuo Shao;Haipeng Ji;Liying Zhang;Shasha Yi;Deliang Chen;Junhua Hu;Yanfeng Gao

作者机构：School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Materials Science and EngineeringShanghai UniversityShanghai 200444China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第1期

页      面：527-533页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported in part by funding from the National Natural Science Foundation of China(NSFC,Nos.51502268,51325203,22002142 and 51574205) the Provincial and Ministerial Co-construction of Collaborative Innovation Center for Resource Materials(No.zycl202008) 

主　　题：Hierarchical porous carbon Phase separation MXene Interlayer Lithium-sulfur battery 

摘      要：Lithium-sulfur batteries(LSBs)are among the most promising series of next-generation high density energy storage ***,the problem of“shuttle effectcaused by dissolution and migration of polysulfide intermediates has severely inhibited their practical ***,TiO_(2)-carbon nanocomposites embedded hierarchical porous carbon(T-hPC)interlayers are fabricated via Ti_(3)C_(2)MXene assisted phase separation and annealing *** T-hPC processes micro-to macro-scale multipores along with highly adsorptive and catalytic carbon supported TiO_(2) nanoparticles,which significantly enhances the polysulfides immobilization and improves the redox reaction kinetics when applied as lithium-sulfur battery *** initial discharge specific capacity of 1551.1 m Ah/g and a stable capacity of 893.8 m Ah/g after 200 cycles at 0.5 C are obtained,corresponding to a capacity decay rate of only 0.04%per *** investigations in this paper can provide a simple and effective strategy to enhance the electrochemical properties for lithium-sulfur batteries.