Large-scale synthesis of hybrid metal oxides through metal redox mechanism for high-performance pseudocapacitors.
作者： Zhonghua Ren , Jianpeng Li , Yaqi Ren , Shuguang Wang , Yejun Qiu
DOI: 10.1038/SREP20021
关键词:
摘要: Electrochemical performance and production cost are the main concerns for practical application of supercapacitors. Here we report a simple universally applicable method to prepare hybrid metal oxides by redox reaction utilizing inherent reducibility metals oxidbility first time. As an example, Ni(OH)2/MnO2 nanosheets (NMNSs) grown supercapacitor self-reaction Ni foam substrates in KMnO4 solution at room temperature. The obtained exhibit high specific capacitance (2,937 F g(-1)). assembled solid-state asymmetric pseudocapacitors possess ultrahigh energy density 91.13 Wh kg(-1) (at power 750 W kg(-1)) extraordinary cycling stability with 92.28% retention after 25,000 cycles. Co(OH)2/MnO2 Fe2O3/MnO2 also synthesized through this mechanism. This green low-cost is capable large-scale one-step preparation electrodes, holding promise high-performance pseudocapacitors.
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