Environmental-Friendly and Facile Synthesis of Co3O4 Nanowires and Their Promising Application with Graphene in Lithium-Ion Batteries

被引:0
作者
Zhiqiang Xu
Wei Liu
Yuanyi Yang
Lijuan Sun
Yi Deng
Li Liao
机构
[1] Sichuan University,School of Chemical Engineering
[2] Sichuan University,Institute of New Energy and Low
[3] Sichuan College of Architectural Technology,Carbon Technology
来源
Nanoscale Research Letters | 2017年 / 12卷
关键词
Co; O; nanowires; Magnetic field; Lithium-ion batteries; Graphene;
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摘要
In this work, we developed an eco-friendly strategy for preparing Co3O4 nanowires. The process consisted of two steps: controllable synthesis of metal cobalt nanowires followed by a facile air-oxidization step. The 1D nanowire structure with a high aspect ratio was easily achieved via a magnetic-field-assisted self-assembly of cobalt ion complexes during reduction. After air-calcinations, the Co3O4 nanowires were prepared in large scale and ready to be used as the anode material for lithium-ion batteries. The Co3O4 nanowires, which possessed a length ranging from 3 to 8 μm with the aspect ratio more than 15, exhibited a reversible lithium storage capacity up to ~ 790 mAh/g when using a small amount of defect-free graphene flakes as conductive additives. The superior electrochemical performances were ascribable to the synergistic “flat-on” effect between the 1D nanowires and the 2D graphene. Therefore, the Co3O4 nanowire/graphene composite holds promising application for lithium-ion batteries.
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