Self-Assembly of Bi2Te3-Nanoplate/Graphene-Nanosheet Hybrid by One-Pot Route and Its Improved Li-Storage Properties

Materials

Fangfang Tu²  Jian Xie¹  Gaoshao Cao² 

[1] State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;

关键词: bismuth telluride;    graphene;    Li-ion batteries;    sandwich;   

DOI  :  10.3390/ma5071275

来源: mdpi

【 摘 要 】

A sandwich structured Bi₂Te₃-nanoplates/graphene-nanosheet (Bi₂Te₃/G) hybrid has been synthesized by a facile in situ solvothermal route and has been investigated as a potential anode material for Li-ion batteries. Bi₂Te₃ grows during the solvothermal process with the simultaneous reduction of graphite oxide into graphene. The in situ formation process of the hybrid has been investigated by X-ray diffraction and X-ray photoelectron spectra. The Li-storage mechanism and performance of Bi₂Te₃/G and bare Bi₂Te₃ have been studied by galvanostatic cycling and cyclic voltammetry. The Bi₂Te₃/G sandwich exhibits an obviously improved cycling stability compared to bare Bi₂Te₃. The enhancement in electrochemical performance can be attributed to the combined conducting, confining and dispersing effects of graphene for Bi₂Te₃ nanoplates and to the self-assembled sandwich structure.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.