文献类型：期刊文献

英文题名：In-situ synthesis of highly graphitized and Fe/N enriched carbon tubes as catalytic mediums for promoting multi-step conversion of lithium polysulfides

作者：Zeng, Peng[1];Peng, Jiao[1];Yu, Hao[1];Zhou, Xi[1];Wang, Kaifu[1];Liu, Jiali[1];Zhou, Ziyi[1];Chen, Manfang[1];Miao, Changqing[2];Guo, Xiaowei[2];Chang, Baobao[3];Wang, Xianyou[1]

第一作者：Zeng, Peng

通讯作者：Chen, MF[1];Wang, XY[1]

机构：[1]Xiangtan Univ, Natl Base Int Sci & Technol Cooperat,Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stor, Hunan Prov Key Lab Elect Energy Storage Convers, Xiangtan 411105, Hunan, Peoples R China;[2]Xinxiang Univ, Sch Chem Mat Engn, Xinxiang 453003, Henan, Peoples R China;[3]Zhengzhou University, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450001, Henan, Peoples R China

第一机构：Xiangtan Univ, Natl Base Int Sci & Technol Cooperat,Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stor, Hunan Prov Key Lab Elect Energy Storage Convers, Xiangtan 411105, Hunan, Peoples R China

通讯机构：[1]corresponding author), Xiangtan Univ, Natl Base Int Sci & Technol Cooperat,Sch Chem, Natl Local Joint Engn Lab Key Mat New Energy Stor, Hunan Prov Key Lab Elect Energy Storage Convers, Xiangtan 411105, Hunan, Peoples R China.

年份：2022

卷号：192

起止页码：418-428

外文期刊名：CARBON

收录：;EI(收录号：20221111788003);Scopus(收录号：2-s2.0-85126128594);WOS:【SCI-EXPANDED(收录号:WOS:000783471100040)】；

语种：英文

外文关键词：Graphitized carbon tubes; Fe nanocrystalline; Catalytic conversion; Li-S batteries; Lithium polysulfides

摘要：The development of LieS batteries is severely limited by the poor conductivity and slow reaction kinetics of sulfur cathodes. Herein, we prepare a highly graphitized and Fe/N enriched carbon tube (Fe/N-g-CT) as multifunctional host. It is found that the introduction of Fe can efficaciously promote the transformation from amorphous carbon sheets to graphitized carbon tubes (CT), while the residual Fe species embedded in CT can act as catalytic active sites along with the doped heteroatoms. Specifically, Fe sites can accelerate the inter-conversion of soluble lithium polysulfides, while the doped-N heteroatoms can promote the deposition of Li2S. Consequently, Fe/N-g-CT catalytic mediums synchronously improve the conductivity and reaction kinetics of sulfur electrodes, and Fe/N-g-CT/S cathode exhibits a high initial specific capacity (1500.5 mAh g(-1) at 0.1 C) and a low fading rate (0.06% per cycle at 2 C over 500 cycles). Moreover, even with high sulfur loading (4.5 mg cm(-2)) and lean electrolyte consumption (E/ S = 5 mL mg(-1)), a satisfactory areal capacity of 5.1 mAh cm(-2) can also be achieved. This paper raises a good strategy or idea to boost the development and commercialization application of LieS battery with high performance through reasonably constructing sulfur host with high conductivity and catalysis activity. (C) 2022 Elsevier Ltd. All rights reserved.