Preparation of uniform flower-like CuO and flower-like CuO/graphene composite and their application in lithium ion batteries
Flower-like CuO and flower-like CuO/graphene composite were prepared successfully by hydrothermal method.They were characterized by by X-ray diffraction,scanning electron microscopy,nitrogen adsorption,temperature-programmed reduction,and thermogravimetric analysis.It was found that the flower-like CuO microspheres,which are composed of CuO nanosheets,possess an average diameter of 4.2 μm and a Brunauer-Emmett-Teller surface area of 12.6 m2 g-1.Compared to the flower-like CuO,the obtained flower-like CuO/graphene composite shows an enhanced electrochemical performance with a higher capacity of 603 mAh g-1 at 0.1 C rate and 382 mAh g-1 at 1 C rate,and exhibits a better cycle stability with high capacity retention of 95.5 % after 50 cycles even though at 1 C rate.Therefore the flower-like CuO/graphene composite is a potential anode material in Li-ion batteries.
Lithium ion batteries anode materials CuO microsphere grapheme
Chen Han Feng Fan Hu Zhongliang Liu Fusheng Gong Wenqiang Xiang Kaixiong
College of Metallurgy Engineering, Hunan University of Technology, Zhuzhou 412000, China
国际会议
上海
英文
113-113
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）