Hollow spheres of Mo2C@C as synergistically confining sulfur host for superior Li-S battery cathode

时间:2020-07-07作者:浏览量:39


Hollow spheres of Mo2C@C as synergistically confining sulfur host for superior Li-S battery cathode

作者:Wang, ZS (Wang, Zhuosen)[ 1 ] ; Xu, XJ (Xu, Xijun)[ 1 ] ; Liu, ZB (Liu, Zhengbo)[ 1 ] ; Ji, SM (Ji, Shaomin)[ 2 ] ; Idris, SOA (Idris, Sahar Osman Ahmed)[ 1 ] ; Liu, J (Liu, Jun)[ 1 ]


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ELECTROCHIMICA ACTA


卷: 332

文献号: 135482


DOI: 10.1016/j.electacta.2019.135482


出版年: FEB 1 2020


文献类型:Article


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摘要

Lithium-sulfur batteries (LSBs) have attracted much attention in the field of electrochemical energy storage due to their high energy density and low cost. However, the 'shuttle effect' of sulfur cathode, resulting in the poor cyclic performance of batteries, is a big barrier for the development of LSBs. To overcome this critical drawback, herein, a matrix of well-designed double carbon shells-encapsulated metallic Mo2C nanoparticles (Mo2C/C@C) is facilely achieved as an efficient sulfur host for high-performance LSBs. During the electrochemical process, the embedded polar and metallic Mo2C nanoparticles could effectively retard polysulfide migration. While for the carbon layers, they can not only act as conductive matrix but also promote the restriction for all sulfur species and maintain the structural stability simultaneously. Specially, the inner carbon layer is mainly for encapsulation and the outside one for surface-modification. As a result, such well-designed Mo2C/C@CeS cathode could effectively adsorb soluble polysulfides both from chemical and physical aspects, and well confines them inside the porous structure of Mo2C/C@C, thus achieving a high reversible capacity and superior cycling performance. (C) 2019 Elsevier Ltd. All rights reserved.


关键词

作者关键词:Li-S batteries; Polysulfide adsorption; N-doped carbon; Molybdenum carbide; Sulfur cathode


KeyWords Plus:METAL-ORGANIC FRAMEWORKS; ION BATTERIES; CARBON; NANOWIRES; NANOCAGES; ELECTRODE; FACILE; SHELL; POWER


作者信息

通讯作者地址: Liu, J (通讯作者)


显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China.

通讯作者地址: Ji, SM (通讯作者)

显示更多Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China

显示更多[ 2 ]‎ Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

电子邮件地址:smji@gdut.edu.cn; msjliu@scut.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China


51771076

Project of Public Interest Research and Capacity Building of Guangdong Province

2017A010104004

Guangzhou Science and Technology Plan Projects

201804010104

National Natural Science Foundation of China


NSFC51621001

1000 plan from Chinese Government  

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出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Electrochemistry


Web of Science 类别:Electrochemistry