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MnO2/graphite electrodeposited under supergravity field for supercapacitors and its electrochemical properties |
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| Authors: | Shuang Liu Haifeng Dong Jianping Du Xiujuan Qin Guangjie Shao |
| Affiliation: | 1. Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China 2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China |
| Abstract: | MnO2/graphite electrode material is successfully synthesized by electrodeposition under supergravity field from manganese acetate and graphite suspending solution. X-ray diffraction and field emission scanning electron microscopy show that the obtained composite is γ-MnO2/graphite. The process of depositing the MnO2/graphite was shown by the schematic illustration. Galvanostatic charge/discharge and cyclic voltammograms tests are applied to investigate electrochemical performances of the composite electrodes prepared under supergravity fields. MnO2/graphite synthesized under supergravity field exhibits good discharge capacitance and the specific capacitance is 367.77 F g?1 at current density of 0.5 A g?1. It is found that supergravity field has effects on the electrochemical performances of MnO2/graphite material. |
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