文献类型：期刊文献

英文题名：Atomic Fe on hierarchically ordered porous carbon towards High- performance Lithium-sulfur batteries

作者：Chen, Xinan[1];Zhu, Zhengju[1];Vargun, Elif[3];Li, Yiwen[1];Saha, Petr[2];Cheng, Qilin[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultra Fine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Tomas Bata Univ Zlin, Sino EU Joint Lab New Energy Mat & Devices, Nam T G Masaryka 5555, Zlin 76001, Czech Republic;[3]Mugla Sitki Kocman Univ, Dept Chem, TR-48000 Mugla, Turkiye

年份：2023

卷号：928

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20225113262888);WOS:【SCI-EXPANDED(收录号:WOS:000907045600016)】；

基金：This work was supported by the National Natural Science Foundation of China (22108079) , Shanghai Pujiang Program (21PJD018) , China Postdoctoral Science Foundation (2020M681208) , the Czech Ministry of Education, Youth and Sports INTER -EXCELLENCE programme under the grant agreement No. LTT20005. Additional support was provided by Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Lithium -sulfur batteries; Single atom catalyst; Polysulfide conversion; Hierarchically porous carbon; Electrochemistry

摘要：Lithium-sulfur (Li-S) battery is the promising next-generation energy storage device owing to its ultra-high the-oretical energy density and low cost. Unfortunately, its practical performance is significantly hindered by the poor conductivity of sulfur, huge volume change, and soluble lithium polysulfides (LiPSs). To address above issues, single iron (Fe) atoms anchored on hierarchically porous carbon substrate configured by ordered macro -pores and widespread mesopores/micropores (Fe-N-C/OC) are synthesized and acted as carbon hosts for sul-fur cathodes. Single Fe atoms in Fe-N4 moieties serve as active sites to accelerate conversion kinetics of LiPSs due to strong catalytic ability, thereby the shuttle effect being obviously restrained. Meanwhile, the trimodal-porous structure provides continuous carbon framework for enhanced electrical conductivity, ordered macro -porous channels bridged by mesopores for rapid Li+ diffusion, and adequate spaces to reserve sulfur volume oscillation. Consequently, sulfur-loaded Fe-N-C/OC (Fe-N-C/OC/S) cathodes exhibit an impressive specific capacity of 1442 mAh g-1 at 0.1C and maintain the capacity retention of 89.2 % after 300 cycles at 1C. It offers fresh insights for designing efficient sulfur hosts to enhance the performance of Li-S batteries.