Effect of boron doped fullerene C60 film coating on the electrochemical characteristics of silicon thin film anodes for lithium secondary batteries
Effect of boron doped fullerene C60 film coating on the electrochemical characteristics of silicon thin film anodes for lithium secondary batteries
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DOI：
10.1016/j.synthmet.2010.11.015
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发表时间：
2011-01-01
期刊：
影响因子：
4.4
通讯作者：
Lee, Joong Kee
中科院分区：
文献类型：
--
作者：
Arie, Arenst Andreas;Lee, Joong Kee
本工作采用射频等离子体辅助热蒸发技术制备了硼掺杂富勒烯（B:C-60）薄膜，用作锂二次电池硅薄膜负极的涂层材料。拉曼和 XPS 分析表明，硼原子很好地插入到富勒烯薄膜晶格中。通过充放电测试、电化学阻抗谱(EIS)和循环伏安法(CV)研究了B:C-60薄膜对硅薄膜电化学特性的影响。 B:C-60涂覆的硅薄膜在1200μA·cm(-2)(1.5C)电流密度下在0～2V之间循环50次后表现出超过1200mAh·g(-1)的高可逆容量。与C-60涂层薄膜电极相比，该薄膜在不同电流密度下也表现出良好的倍率容量，首轮库伦效率提高了87.7%。 (C) 2010 Elsevier B.V. 保留所有权利。
In this work, boron doped fullerene (B:C-60) films were prepared by the radio frequency plasma assisted thermal evaporation technique for use as a coating material for the silicon thin film anode in lithium secondary batteries. Raman and XPS analyses revealed that the boron atoms were well inserted into the fullerene film lattices. The effect of the B:C-60 film on the electrochemical characteristics of the silicon thin film was studied by charge-discharge tests, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The B:C-60 coated silicon film exhibited a high reversible capacity of more than 1200 mAh g(-1) when cycled 50 times between 0 and 2 V at a current density of 1200 mu A cm(-2) (1.5 C). The film also showed good rate capacity at different current densities and a more improved coulombic efficiency of 87.7% in the first cycle in comparison with that of the C-60 coated film electrode. (C) 2010 Elsevier B.V. All rights reserved.