文献类型：期刊文献

英文题名：Realizing anti-self-discharged lithium-sulfur batteries by using hierarchical porous carbon nanofibers embedded with Fe/Ni-N catalytic sites

作者：Nie, Tiantian[1];Zhu, Yuejin[1];Fang, Minxiang[1];Ma, Lianbo[2];Xu, Jie[2];Cao, Yongjie[3,4];Hu, Shuozhen[1];Zhang, Xinsheng[1];Niu, Dongfang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Peoples R China;[3]Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China;[4]Fudan Univ, Inst New Energy, IChEM Collaborat Innovat Ctr Chem Energy Mat, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China

年份：2023

卷号：640

起止页码：908

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20231113709297);WOS:【SCI-EXPANDED(收录号:WOS:000971286300001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21972042) , the National Key R&D Program of China (No. 2017YFB0307502) , and the Scientific Research Foundation of Anhui University of Technology for Talent Introduction (DT2200002821) .

语种：英文

外文关键词：Anti-self-discharge; Fe; Ni-N; Lithium-sulfur batteries; Modified separator; Shuttle inhibition

摘要：Lithium-sulfur (Li-S) batteries are featured with high gravimetric energy density, yet their commercial application is significantly deteriorated with the severe self-discharging resulted from the polysulfides shuttle and sluggish electrochemical kinetics. Here, a hierarchical porous carbon nanofibers implanted with Fe/Ni-N (denoted as Fe-Ni-HPCNF) catalytic sites are prepared and used as a kinetics booster toward anti-self-discharged Li-S batteries. In this design, the Fe-Ni-HPCNF possesses interconnected porous skeleton and abundant exposed active sites, enabling fast Li-ion conduction, excellent shuttle inhibition and catalytic ability for polysulfides' conversion. Combined with these advantages, this cell with the FeNi-HPCNF equipped separator exhibits an ultralow self-discharged rate of 4.9% after resting for one week. Moreover, the modified batteries deliver a superior rate performance (783.3 mAh g-1 at 4.0 C) and an outstanding cycling life (over 700 cycles with 0.057% attenuation rate at 1.0 C). This work may guide the advanced design of anti-self-discharged Li-S batteries.