Manipulating fast Li_(2)S redox via carbon confinement and oxygen defect engineering of In_(2)O_(3)for lithium-sulfur batteries  

作　　者：Jinlei Qin Rui Wang Zilong Yuan Pei Xiao Deli Wang 

机构地区：[1]Key Laboratory of Material Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Nano Research》2024年第6期5179-5187,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.22279036);the Innovation and Talent Recruitment Base of New Energy Chemistry and Device(No.B21003).

摘　　要：Lithium-sulfur(Li-S)batteries have been considered as promising energy storage systems due to the merits of high energy density and low cost.However,the lithium polysulfides(LiPSs)diffusion and sluggish redox kinetics hamper the battery performance.In this work,low-bandgap indium oxide(In_(2)O_(3))with dense oxygen vacancies(In_(2)O_(3−x),0<x<3)confined in nitrogen-doped carbon column(NC)is developed as a desirable LiPSs immobilizer and promoter to address these intractable problems.The NC confined In_(2)O_(3−x)with rich O vacancies(In_(2)O_(3−x)@NC)lowers the bandgap of 1.78 eV,strengthens the chemical adsorbability to LiPSs,and catalyzes the bidirectional Li_(2)S redox.Attributed to the structural and chemical cooperativities,the obtained sulfur electrodes exhibit a stable cycling over 550 cycles at 1.0 C and splendid rate capability up to 4.0 C.More significantly,when the sulfur-loading reaches as high as 5.5 mg·cm^(−2),the cathodes achieve an areal capacity of 5.12 mAh·cm^(−2)at 0.1 C.The strategy of NC confined catalyst with rich defects engineering demonstrates great promise in the development of practical Li-S batteries.

关 键 词：Li-S batteries nitrogen-doped carbon confinement oxygen vacancies bidirectional Li_(2)S redox 

分 类 号：TM912[电气工程—电力电子与电力传动]