Room-temperature facile synthesis of MnO2on carbon film via UV-photolysis for supercapacitor |
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| Authors: | Shiwei Liu Kai Li Xuebin Zheng |
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| Institution: | 1. Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China |
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| Abstract: | A facile UV-photolysis method has been developed to synthesize birnessite-type MnO_2 nanosheets on carbon film at room temperature for supercapacitor electrode materials. The results clearly demonstrated that the specific capacitance of carbon/MnO_2 composite electrodes was controlled by the adjustable UV-photolysis reaction time in KMnO_4 solution. For the optimized composite electrode obtained after 2 h reaction, a superior specific capacitance of 277 Fg~(-1) was achieved at current density of 0.2 Ag~(-1). This finding suggests that UV-photolysis is a potential method to fabricate MnO_2 on carbon film for supercapacitor. |
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| Keywords: | Corresponding author Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 China UV-Photolysis Nanosheets Carbon Supercapacitor |
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