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2D hierarchical yolk-shell heterostructures as advanced host-interlayer integrated electrode for enhanced Li-S batteries
Dong, Yanfeng; Lu, Pengfei; Shi, Haodong; Qin, Jieqiong; Chen, Jian; Ren, Wencai; Cheng, Hui-Ming; Wu, Zhong-Shuai
2019-09-01
Source PublicationJOURNAL OF ENERGY CHEMISTRY
ISSN2095-4956
Volume36Pages:64-73
AbstractLithium sulfur (Li-S) batteries hold great promising for high-energy-density batteries, but appear rapid capacity fading due to the lack of overall and elaborated design of both sulfur host and interlayer. Herein, we developed a novel two-dimensional (2D) hierarchical yolk-shell heterostructure, constructed by a graphene yolk, 2D void and outer shell of vertically aligned carbon-mediated MoS2 nanosheets (G@void@MoS2/C), as advanced host-interlayer integrated electrode for Li-S batteries. Notably, the 2D void, with a typical thickness of similar to 80nm, provided suitable space for loading and confining nano sulfur, and vertically aligned ultrathin MoS2 nanosheets guaranteed enriched catalytically active sites to effectively promote the transition of soluble polysulfides. The conductive graphene yolk and carbon mediated shell sufficiently accelerated electron transport. Therefore, the integrated electrode of G@void@MoS2/C not only exceptionally confined the sulfur/polysulfides in 2D yolk-shell heterostructures, but also achieved catalytic transition of the residual polysulfides dissolved in electrolyte to solid Li2S2/Li2S, both of which synergistically achieved an extremely low capacity fading rate of 0.05% per cycle over 1000 times at 2 C, outperforming most reported Mo based cathodes and interlayers for Li-S batteries. 2D hierarchical yolkshell heterostructures developed here may shed new insight on elaborated design of integrated electrodes for Li-S batteries. (C) 2019 The Author(s). Published by Elsevier B.V. and Science Press on behalf of Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
KeywordMoS2 Graphene Yolk shell 2D heterostructure Lithium sulfur batteries
Indexed BySCI
Language英语
WOS IDWOS:000492695800008
PublisherELSEVIER
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80777
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Dong, Yanfeng,Lu, Pengfei,Shi, Haodong,et al. 2D hierarchical yolk-shell heterostructures as advanced host-interlayer integrated electrode for enhanced Li-S batteries[J]. JOURNAL OF ENERGY CHEMISTRY,2019,36:64-73.
APA Dong, Yanfeng.,Lu, Pengfei.,Shi, Haodong.,Qin, Jieqiong.,Chen, Jian.,...&Wu, Zhong-Shuai.(2019).2D hierarchical yolk-shell heterostructures as advanced host-interlayer integrated electrode for enhanced Li-S batteries.JOURNAL OF ENERGY CHEMISTRY,36,64-73.
MLA Dong, Yanfeng,et al."2D hierarchical yolk-shell heterostructures as advanced host-interlayer integrated electrode for enhanced Li-S batteries".JOURNAL OF ENERGY CHEMISTRY 36(2019):64-73.
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