期刊
RSC ADVANCES
卷 4, 期 12, 页码 6083-6089出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra45904g
关键词
-
资金
- Nature Science Foundation of China [20873089, 20975073]
- Nature Science Foundation of Jiangsu Province [BK2011272]
- Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2011130]
- State Key Laboratory of Lithium Ion Battery Materials of Jiangsu Province
In this study, Co3O4 with different morphologies (leaf, sheet, and cube) are successfully synthesized by a facile hydrothermal method followed by calcination treatment. Representative samples with different morphological structures are compared and evaluated as anode materials in lithium-ion batteries. Relative to the Co3O4-sheet and Co3O4-cube samples, the Co3O4-leaf samples exhibit excellent electrochemical performance with high storage capacity (1245 mA h g(-1) after 40 cycles at 0.1 C) and superior rate capability (0.1, 0.2, 0.5, 1, and 2 C for 1028, 1085, 1095, 1038, and 820 mA h g(-1), respectively); interestingly, the thinner the samples are, the better their performance. Moreover, assisted by characterization by cyclic voltammetry and electrochemical impedance spectroscopy, we draw a conclusion that the ultra-thin structures result in shorter path lengths for the transport of lithium ions and electrons, benefiting conductivity and fast charge-discharge rates. More importantly, for Co3O4, the respective structure's degree of thickness has a great effect on the electrochemical performance in lithium-ion batteries. This new concept might be extended to prepare other anode and cathode materials for advanced energy storage and conversion devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据