Facile preparation of ultrafine manganese dioxide nanowires on activated carbon paper with enhanced capacitance for supercapacitors

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• 作者：Peng Liu ; Ni Zhang ; Zhiyu Cheng ; Yongfu Qiu ; Pingru Xu ; Weiqing Huang ; Hongbo Fan…
• 关键词：Capacitors ; Electrochemical characterizations
• 刊名：Ionics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：247-251
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：23

文摘

In this paper, a structure with growing MnO₂ nanowires (NWs) on activated carbon paper was designed and prepared using a simple hydrothermal method. Electrochemical measurements show that the specific capacitance of these MnO₂ nanowires/ACP reached 390 F g−1 at a scan rate of 10 mV s−1 and 529 F g−1 at a current density of 2.0 A g−1. The long-term cycle life stability for MnO₂ nanowires/ACP was examined and the results show that the capacitance decay was ~12% over 5000 cycles, indicating its long cycle life. Furthermore, they could also be used to assemble simple solid-state supercapacitors with high capacitance. These results show that the MnO₂ nanowires/ACP could be a promising electrode material for energy storage.