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Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites with Superior High-Rate Capability as Lithium-Ion Battery Cathodes.
ACS Appl Mater Interfaces 2015; 7(23):13044-52AA

Abstract

In this study, a facile one-pot process for the synthesis of hierarchical VS2/graphene nanosheets (VS2/GNS) composites based on the coincident interaction of VS2 and reduced graphene oxide (rGO) sheets in the presence of cetyltrimethylammonium bromide is developed for the first time. The nanocomposites possess a hierarchical structure of 50 nm VS2 sheets in thickness homogeneously anchored on graphene. The VS2/GNS nanocomposites exhibit an impressive high-rate capability and good cyclic stability as a cathode material for Li-ion batteries, which retain 89.3% of the initial capacity 180.1 mAh g(-1) after 200 cycles at 0.2 C. Even at 20 C, the composites still deliver a high capacity of 114.2 mAh g(-1) corresponding to 62% of the low-rate capacity. Expanded studies show that VS2/GNS, as an anode material, also has a good reversible performance with 528 mAh g(-1) capacity after 100 cycles at 200 mA g(-1). The excellent electrochemical performance of the composites for reversible Li+ storage should be attributed to the exceptional interaction between VS2 and GNS that enabled fast electron transport between graphene and VS2, facile Li-ion diffusion within the electrode. Moreover, GNS provides a topological and structural template for the nucleation and growth of two-dimensional VS2 nanosheets and acted as buffer matrix to relieve the volume expansion/contraction of VS2 during the electrochemical charge/discharge, facilitating improved cycling stability. The VS2/GNS composites may be promising electrode materials for the next generation of rechargeable lithium ion batteries.

Authors+Show Affiliations

†Department of Chemistry, College of Science, Shanghai University, No. 99 Shangda Road, Shanghai 200444, People's Republic of China.†Department of Chemistry, College of Science, Shanghai University, No. 99 Shangda Road, Shanghai 200444, People's Republic of China. ‡Department of Chemical Engineering, University of Waterloo, 200 University Ave. West, Waterloo N2L 3G1, Canada.†Department of Chemistry, College of Science, Shanghai University, No. 99 Shangda Road, Shanghai 200444, People's Republic of China.†Department of Chemistry, College of Science, Shanghai University, No. 99 Shangda Road, Shanghai 200444, People's Republic of China.†Department of Chemistry, College of Science, Shanghai University, No. 99 Shangda Road, Shanghai 200444, People's Republic of China.‡Department of Chemical Engineering, University of Waterloo, 200 University Ave. West, Waterloo N2L 3G1, Canada.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26016687

Citation

Fang, Wenying, et al. "Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites With Superior High-Rate Capability as Lithium-Ion Battery Cathodes." ACS Applied Materials & Interfaces, vol. 7, no. 23, 2015, pp. 13044-52.
Fang W, Zhao H, Xie Y, et al. Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites with Superior High-Rate Capability as Lithium-Ion Battery Cathodes. ACS Appl Mater Interfaces. 2015;7(23):13044-52.
Fang, W., Zhao, H., Xie, Y., Fang, J., Xu, J., & Chen, Z. (2015). Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites with Superior High-Rate Capability as Lithium-Ion Battery Cathodes. ACS Applied Materials & Interfaces, 7(23), pp. 13044-52. doi:10.1021/acsami.5b03124.
Fang W, et al. Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites With Superior High-Rate Capability as Lithium-Ion Battery Cathodes. ACS Appl Mater Interfaces. 2015 Jun 17;7(23):13044-52. PubMed PMID: 26016687.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Facile Hydrothermal Synthesis of VS2/Graphene Nanocomposites with Superior High-Rate Capability as Lithium-Ion Battery Cathodes. AU - Fang,Wenying, AU - Zhao,Hongbin, AU - Xie,Yanping, AU - Fang,Jianhui, AU - Xu,Jiaqiang, AU - Chen,Zhongwei, Y1 - 2015/06/05/ PY - 2015/5/29/entrez PY - 2015/5/29/pubmed PY - 2015/5/29/medline KW - cathode materials KW - graphene KW - layered-VS2 KW - lithium ion batteries KW - transition metal dichalcogenides SP - 13044 EP - 52 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 7 IS - 23 N2 - In this study, a facile one-pot process for the synthesis of hierarchical VS2/graphene nanosheets (VS2/GNS) composites based on the coincident interaction of VS2 and reduced graphene oxide (rGO) sheets in the presence of cetyltrimethylammonium bromide is developed for the first time. The nanocomposites possess a hierarchical structure of 50 nm VS2 sheets in thickness homogeneously anchored on graphene. The VS2/GNS nanocomposites exhibit an impressive high-rate capability and good cyclic stability as a cathode material for Li-ion batteries, which retain 89.3% of the initial capacity 180.1 mAh g(-1) after 200 cycles at 0.2 C. Even at 20 C, the composites still deliver a high capacity of 114.2 mAh g(-1) corresponding to 62% of the low-rate capacity. Expanded studies show that VS2/GNS, as an anode material, also has a good reversible performance with 528 mAh g(-1) capacity after 100 cycles at 200 mA g(-1). The excellent electrochemical performance of the composites for reversible Li+ storage should be attributed to the exceptional interaction between VS2 and GNS that enabled fast electron transport between graphene and VS2, facile Li-ion diffusion within the electrode. Moreover, GNS provides a topological and structural template for the nucleation and growth of two-dimensional VS2 nanosheets and acted as buffer matrix to relieve the volume expansion/contraction of VS2 during the electrochemical charge/discharge, facilitating improved cycling stability. The VS2/GNS composites may be promising electrode materials for the next generation of rechargeable lithium ion batteries. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/26016687/Facile_Hydrothermal_Synthesis_of_VS2/Graphene_Nanocomposites_with_Superior_High_Rate_Capability_as_Lithium_Ion_Battery_Cathodes_ L2 - https://dx.doi.org/10.1021/acsami.5b03124 DB - PRIME DP - Unbound Medicine ER -