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Supernormal Conversion Anode Consisting of High-Density MoS2Bubbles Wrapped in Thin Carbon Network by Self-Sulfuration of Polyoxometalate Complex
Wang, Peiyuan1; Tian, Jing1,2; Hu, Jiulin1,2; Zhou, Xuejun1; Li, Chilin1
2017
发表期刊ACS Nano
ISSN19360851
卷号11期号:7页码:7390-7400
摘要Large-capacity conversion electrodes are highly required to raise the energy density of batteries. However, their undesired phase segregation and volume expansion during cycling lead to the motivation for nanofabrication and nanochemistry of active species in order to decrease "dead mass" and promote better construction of conductive networks. However, the inactivity of the conductive skeleton and loose nanostructure would compromise the energy density of the electrode. The integration of large-sized (high-density) grains into an electroactive conductive network in a compact way is still a big challenge. Here we report a proof-of-concept prototype consisting of unusual MoS2solid bubbles of hundreds of nanometers in size, which are conformally encapsulated by thin-layer carbon. The seamless welding between this carbon coating and the surrounding broader carbon substrate can effectively avoid the peel-off of active species and breakage of the conductive network. This MoS2-C composite is achieved by simultaneous self-sulfuration and self-carbonization of a polyoxometalate (POM)-based chelate, and its Li-storage performance is superior to most MoS2-based anodes even with ultrathin 2D nanosheets. Partially benefiting from the electroactivity of a dithiooxamide (DTO)-derivate carbon network, the reversible capacity of MoS2-C by pyrolyzing the POM-DTO chelate can reach 1500-2000 mAh/g at 0.5-1 A/g even after 700 cycles and be maintained around 1000 mAh/g under as high as 10-20 A/g. © 2017 American Chemical Society.
DOI10.1021/acsnano.7b03665
EI入藏号20173103996856
EI主题词Layered semiconductors
EI分类号538.2.2 Welding Equipment - 714.1 Electron Tubes - 802.2 Chemical Reactions - 804 Chemical Products Generally
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文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25612
专题中国科学院上海硅酸盐研究所
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai; 200050, China;
2.University of Chinese, Academy of Sciences, Beijing; 100039, China
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Wang, Peiyuan,Tian, Jing,Hu, Jiulin,et al. Supernormal Conversion Anode Consisting of High-Density MoS2Bubbles Wrapped in Thin Carbon Network by Self-Sulfuration of Polyoxometalate Complex[J]. ACS Nano,2017,11(7):7390-7400.
APA Wang, Peiyuan,Tian, Jing,Hu, Jiulin,Zhou, Xuejun,&Li, Chilin.(2017).Supernormal Conversion Anode Consisting of High-Density MoS2Bubbles Wrapped in Thin Carbon Network by Self-Sulfuration of Polyoxometalate Complex.ACS Nano,11(7),7390-7400.
MLA Wang, Peiyuan,et al."Supernormal Conversion Anode Consisting of High-Density MoS2Bubbles Wrapped in Thin Carbon Network by Self-Sulfuration of Polyoxometalate Complex".ACS Nano 11.7(2017):7390-7400.
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