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

机译：一锅法完成Bi2Te3-纳米板/石墨烯-纳米片杂化物的自组装及其改进的储锂性能

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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.
机译：夹层结构的Bi2Te3-纳米板/石墨烯-纳米片（Bi2Te3 / G）杂化物已通过一种简便的原位溶剂热途径合成，并已被研究用作锂离子电池的潜在阳极材料。 Bi2Te3在溶剂热过程中生长，同时将氧化石墨还原为石墨烯。通过X射线衍射和X射线光电子能谱研究了杂化物的原位形成过程。通过恒电流循环和循环伏安法研究了Bi2Te3 / G和裸Bi2Te3的储锂机理和性能。与裸Bi2Te3相比，Bi2Te3 / G三明治具有明显改善的循环稳定性。电化学性能的提高可归因于石墨烯对Bi2Te3纳米板的综合传导，约束和分散作用，以及自组装的三明治结构。

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