High-performance anode based on porous Co₃O₄ nanodiscs

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• 作者：Anqiang Pan ; Yaping Wang ; Wu Xu ; Zhiwei Nie ; Shuquan Liang ; Zimin Nie ; Chongmin Wang ; Guozhong Cao ; Ji-Guang Zhang
• 关键词：Cobalt oxide ; Hydrothermal ; Lithium-ion batteries ; Hexagonal nanodiscs ; Anode
• 刊名：Journal of Power Sources
• 出版年：1 June, 2014
• 年：2014
• 卷：255
• 期：Complete
• 页码：125-129
• 全文大小：1270 K

文摘

In this article, two-dimensional, Co₃O₄ hexagonal nanodiscs are prepared using a hydrothermal method without surfactants. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) have been employed to characterize the structural properties. As revealed by the SEM and TEM experiments, the thickness of our as-fabricated Co₃O₄ hexagonal nanodiscs is about 20聽nm, and the pore diameters range from several nanometers to 30聽nm. As an anode for lithium-ion batteries, porous Co₃O₄ nanodiscs exhibit an average discharge voltage of 鈭?聽V (vs. Li/Li⁺) and a high specific charge capacity of 1161聽mAh聽g^鈭? after 100 cycles. They also demonstrate excellent rate performance and high Columbic efficiency at various rates. These results indicate that porous Co₃O₄ nanodiscs are good candidates as anode materials for lithium-ion batteries.