Microspherical ZnO synthesized from a metal-organic precursor for supercapacitors |
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| Authors: | Guoyong Huang Wenjing Zhang Shengming Xu Yujing Li Yue Yang |
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| Institution: | 1.School of Metallurgy and Environment,Central South University,Changsha,China;2.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,China;3.Department of Materials Science and Engineering, College of Science,China University of Petroleum,Beijing,China;4.Beijing Key Lab of Fine Ceramics,Tsinghua University,Beijing,China |
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| Abstract: | In this paper, ZnO microspheres, which are composed of irregular nanoparticles, have been synthesized successfully from a metal-organic precursor. The average diameter is about 3.5 μm and the specific surface area is 7.53 m2 g?1. Measured by electrochemical tests as electrode materials for supercapacitors, the ZnO powders show high specific capacitances (1017.5 Fg?1 at 5 Ag?1 and 562.5 Fg?1 at 50 Ag?1, respectively) and excellent cycling stability (the specific capacitance was kept at 631.2 Fg?1 and 89.2 % retention after 3000 cycles at 18 Ag?1). These results show that the microspherical ZnO could be a potential electrode material for supercapacitors. |
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