Preparation and electrochemical performances of cubic shape Cu2O as anode material for lithium ion batteries
Preparation and electrochemical performances of cubic shape Cu2O as anode material for lithium ion batteries
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DOI：
10.1016/j.jallcom.2006.09.106
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发表时间：
2007-08
影响因子：
6.2
通讯作者：
C. Zhang;J. Tu;X. H. Huang;Yongfeng Yuan;Xiaorong Chen;F. Mao
中科院分区：
文献类型：
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作者：
C. Zhang;J. Tu;X. H. Huang;Yongfeng Yuan;Xiaorong Chen;F. Mao
采用葡萄糖还原柠檬酸铜络合物溶液制备了立方和星形结晶Cu 2 O颗粒。利用X射线衍射（XRD）和扫描电子显微镜（SEM）对Cu 2 O的微观结构和形貌进行了表征。采用恒电流充放电测试方法研究了Cu 2 O作为锂离子电池负极材料的电化学性能。合成的Cu 2 O颗粒粒径为1-2μm，分布较窄，其形貌对电化学性能有影响。立方Cu 2 O颗粒比星形Cu 2 O提供更高的可逆放电容量（390 mAhg −1），并且还表现出良好的循环性能。星形Cu 2 O颗粒由于循环后的粉碎和劣化而呈现差的循环性能，但立方Cu 2 O颗粒的形态即使在50次循环后也是稳定的。
Cubic and star-shaped crystalline Cu2O particles were synthesized by reducing the copper citrate complex solution with glucose. The microstructure and morphology of the Cu2O were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical properties of the Cu2O as anode materials for lithium ion batteries were measured by galvanostatic charge–discharge tests. The as-synthesized Cu2O particles were 1–2μm with narrow distribution and the shape of Cu2O particles had an effect on the electrochemical properties. The cubic Cu2O particles delivered a higher reversible discharge capacity (390mAhg−1) than the star-shaped Cu2O, and also exhibited good cyclability. The star-shaped Cu2O particles presented poor cyclability due to pulverization and deterioration after cycling, but the morphology of the cubic Cu2O particles was stable even after 50 cycles.