Co₃O₄ nanowires as high capacity anode materials for lithium ion batteries

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• 作者：Xiayin Yao ; Xing Xin ; Yiming Zhang ; Jun Wang ; Zhaoping Liu ; ^{liuzp@nimte.ac.cn} ; Xiaoxiong Xu ; ^{xuxx@nimte.ac.cn}
• 关键词：Co3O4 nanowires ; High capacity ; Good capacity retention ; Anode materials ; Lithium-ion batteries
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：25 April, 2012
• 卷：521
• 期：Complete
• 页码：95-100
• 文件大小：1255 K

摘要

Co₃O₄ nanowires were synthesized from the decomposition of CoC₂O₄路2H₂O nanowires which were obtained through a polyvinyl alcohol (PVA)-assisted solution-based precipitation process. And the formation mechanism of CoC₂O₄路2H₂O nanowires was discussed. The Co₃O₄ nanowires had diameters in the range of 30-60 nm and lengths of several micrometers, inheriting the morphology of the CoC₂O₄路2H₂O nanowires. The Co₃O₄ nanowires as an anode material in lithium-ion batteries exhibited a stable specific discharge/charge capacity of 611 mAh/g and 598 mAh/g after fifty cycles at a current density of 0.11 A/g, which were much higher than that of commercial Co₃O₄ nanoparticles. In addition, the charge capacity of the as-synthesized Co₃O₄ nanowires was more than two times higher than that of the commercial Co₃O₄ nanoparticles at a current density of 1.1 A/g. These results indicate that the as-prepared Co₃O₄ nanowires have potential to be a promising candidate as high capacity anode material in the next generation lithium-ion batteries.