Fabrication of Cu2S cathode for Li-ion battery via a low temperature dry thermal sulfuration method

被引:20
作者
Ni, Shibing [1 ]
Lv, Xiaohu [1 ]
Li, Tao [1 ]
Yang, Xuelin [1 ]
机构
[1] Three Gorges Univ, Coll Mech & Mat Engn, Yichang 443002, Peoples R China
关键词
Chalcogenides; Composite materials; Chemical synthesis; Electrical characterisation; NANOSTRUCTURED ELECTRODE; LITHIUM; PERFORMANCE; STORAGE; ANODE; REACTIVITY; CUS;
D O I
10.1016/j.matchemphys.2013.09.008
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cu2S film that directly grows on porous Cu foam has been fabricated by a novel dry thermal sulfuration approach. The crystalline structure and morphological observation of the as-synthesized Cu2S/Cu were characterized by X-Ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), respectively. The electrochemical performance of the Cu2S/Cu as cathode for Li-ion battery was studied by charge/discharge test and cyclic voltammetry (CV) measurement. The results indicate that the Cu2S/Cu cathode exhibits excellent cycle stability and rate capability. When applying a charge/discharge rate of 0.25 C, it delivers initial discharge and charge capacity of 0.74 and 0.40 mAh cm(-2), respectively. After 100 cycles, the discharge and charge capacity are both 0.41 mAh cm(-2), showing no obvious capacity attenuation. Besides, even after 140 cycles at various rates from 0.3 C to 60 C, the discharge capacity of the Cu2S/Cu cathode can restore 97.8% when lowering the charge/discharge rate to 0.3 C. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:349 / 354
页数:6
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