文献类型：期刊文献

英文题名：FeCo/Fe3C-cross-linked N-doped carbon via synergistic confinement and efficient catalyst to enable high-performance Li-S batteries

作者：Li, Minhui Wang, Hui Wang, Xuyun Ma, Xianguo Ren, Jianwei Wang, Rongfang

第一作者：Li, Minhui

通信作者：Wang, RF[1];Ren, JW[2]

机构：[1]Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[3]Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd,Auckland Pk, ZA-2092 Johannesburg, South Africa

第一机构：Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China

通信机构：corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China;corresponding author), Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd,Auckland Pk, ZA-2092 Johannesburg, South Africa.

年份：2022

卷号：628

起止页码：54-63

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000842367900006)】；

基金：The authors would like to thank the Natural Science Foundation of Shandong Province of China (No. ZR2020MB024) for financially supporting this work.

语种：英文

外文关键词：Lithium-sulfur batteries; Electrocatalysis; Lithium polysulfide; FeCo alloy

摘要：Lithium-sulfur batteries (LSB) with high specific energy capacity and low material costs promise to be the next generation of energy storage devices. However, their commercialization is holding back by the poor cycling stability and fast capacity fading resulting from the shuttle effect and slow redox reaction. In this work, the FeCo/Fe3C-CNC composite was prepared by anchoring FeCo/Fe3C nanoparticles onto the cross-linked N-doped Carbon (CNC). The results showed that the addition of Co element improved the electrochemical activity of Co-Fe alloy through tuning the electronic structure of Fe atoms. The carbon nanotubes (CNTs) grown around Co-Fe alloy and Fe3C nanoparticles exhibited a strong affinity to polysulfide species and superior catalytic capability as nano-reactors. The N-doping CNTs/carbon sheets (CS) facilitated the formation of Li2S compound by promoting the Li+ ions transport while hindering the polysulfide shuttle effect. Hence, the issues of slow redox reactions and loss of polysulfide species were effectively rectified. As a result, the composite cathode FeCo/Fe3C-CNC-based LSB delivered a good specific capacity of 1401 mAh g(-1) at 0.1C, and a low apacity fading rate of 0.029% per cycle at 1C. Besides, the structural stability of the FeCo/Fe3C-CNC composite confirms its potential for the deployment in LSB applications. (C) 2022 Elsevier Inc. All rights reserved.