Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium-sulfur batteries

doi:10.1088/1361-6528/aac060

	Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium-sulfur batteries
	Zheng, L; Huang, TZ; Li, Q; Xin, Y; Sun, D; Razaq, R; Zheng L(郑雷); Huang, YH; Zhang, ZL
刊名	NANOTECHNOLOGY
	2018
卷号	29 期号:29 页码:295401
关键词	lithium-sulfur batteries polysulfide shuttle electrochemical kinetics molybdenum carbides carbon nanotubes
ISSN号	0957-4484
DOI	10.1088/1361-6528/aac060
文献子类	Article
英文摘要	Among different energy storage devices, the lithium-sulfur (Li-S) battery is the subject of recent attention. However, the capacity decay caused by polysulfide shuttle leading to sluggish kinetics of polysulfide redox reactions is the main hindrance for its practical application in Li-S batteries. Herein, molybdenum carbide nanoparticles anchored on carbon nanotubes (Mo2C/CNT) are reported to serve as an efficient cathode material to enhance the electrochemical kinetics of polysulfide conversion in Li-S batteries. Mo2C/CNT shows strong adsorption and activation of polar polysulfides and therefore accelerates the redox kinetics of polysulfides, reduces the energy barrier, effectively mitigates the polarization and polysulfide shuttle, thus improving the electrochemical performance. The S-Mo2C/CNT composite with 70 wt% sulfur loading exhibits high specific discharge capacity (1206 mA h g(-1) at 0.5 C), excellent high-rate performance, long cycle life (900 cycles), and outstanding Coulombic efficiency (similar to 100%) at a high rate (2C) corresponding to a capacity decay of only 0.05%. Remarkably, the S-Mo2C/CNT cathode with high areal sulfur loading of 2.5 mg cm(-2) exhibits high-rate capacities and stable cycling performance over 100 cycles, offering the potential for use in high energy Li-S batteries.
电子版国际标准刊号	1361-6528
WOS关键词	LI-S BATTERIES ; HYDROGEN EVOLUTION REACTION ; LONG CYCLE-LIFE ; CARBON NANOFIBERS ; PERFORMANCE ; CATHODES ; CARBIDE ; GRAPHENE ; SURFACE ; ELECTROCATALYSIS
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000432431300001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285908]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zheng, L,Huang, TZ,Li, Q,et al. Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium-sulfur batteries[J]. NANOTECHNOLOGY,2018,29(29):295401.
APA	Zheng, L.,Huang, TZ.,Li, Q.,Xin, Y.,Sun, D.,...&Zhang, ZL.(2018).Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium-sulfur batteries.NANOTECHNOLOGY,29(29),295401.
MLA	Zheng, L,et al."Enhanced kinetics of polysulfide redox reactions on Mo2C/CNT in lithium-sulfur batteries".NANOTECHNOLOGY 29.29(2018):295401.