Electrochemical reduction of nano-SiO2 in hard carbon as anode material for lithium ion batteries
Electrochemical reduction of nano-SiO2 in hard carbon as anode material for lithium ion batteries
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DOI：
10.1016/j.elecom.2008.09.032
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发表时间：
2008-12-01
影响因子：
5.4
通讯作者：
Chen, Liquan
中科院分区：
文献类型：
--
作者：
Guo, Bingkun;Shu, Jie;Chen, Liquan
采用水热法制备了SiO2/硬碳复合材料。特别注意的是，在复合材料中的纳米SiO2的可能的电化学还原的表征。固体核磁共振（NMR）和X射线光电子能谱（XPS）的研究结果以及复合材料的高储锂容量证明了纳米SiO2的电化学还原以及首次放电时Li 4SiO 4和Li 2 O以及Si的生成。纳米SiO2的可逆储锂容量高达1675 mAh/g。(C)2008 Elsevier B. V.保留所有权利。
A composite of silica (SiO2) and hard carbon was prepared by hydrothermal reaction. Special attention was paid to the characterization of the possible electrochemical reduction of nano-SiO2 in the composite. Evidence by solid-state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) and high lithium storage capacity of the composite prove the electrochemical reduction of nano-SiO2 and the formation of Li4SiO4 and Li2O as well as Si in the first-discharge. The reversible lithium storage capacity of the nano-SiO2 is as high as 1675 mAh/g. (C) 2008 Elsevier B.V. All rights reserved.