MoO2-graphene nanocomposite as anode material for lithium-ion batteries

被引：127
作者：
Tang, Qiwei [2 ]
Shan, Zhongqiang [2 ]
Wang, Li [1 ]
Qin, Xue [1 ]
机构：
[1] Tianjin Univ, Sch Sci, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2012年 / 79卷
基金：
中国国家自然科学基金;
关键词：
MoO2; nanoparticles; Graphene; Anode material; Nanocomposite; Lithium ion batteries; HIGH-CAPACITY; NEGATIVE-ELECTRODE; GRAPHENE OXIDE; STORAGE; REDUCTION; PERFORMANCE; NANOSHEET; PHASE;
D O I：
10.1016/j.electacta.2012.06.093
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
MoO2-graphene composite was synthesized via a two-step of hydrothermal-calcination method. The morphology and structure of the products were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray power diffraction (XRD), and Raman spectroscopy. The content of the graphene in MoO2-graphene composite was examined by thermogravimetric (TG)-differential scanning calorimetry (DSC) analysis. The electrochemical performances of the products were examined by Galvanostatical charge-discharge method, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS). When used as anode material for lithium ion batteries, the MoO2-graphene composite shows an enhanced cyclic performance and lithium storage property. The first discharge capacity of the composite can reach 674.4 mAh g(-1) with a reversible capacity of 429.9 mAh g(-1). Significantly, the composite can also deliver a reversible capacity of as high as 1009.9 mAh g(-1) after 60 charge/discharge cycles. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：148 / 153
页数：6
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