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首页> 外文期刊>CERAMICS INTERNATIONAL >MnO2 nanoneedles loaded on silicon oxycarbide-derived hierarchically porous carbon for supercapacitor electrodes with enhanced electrochemical performance
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MnO2 nanoneedles loaded on silicon oxycarbide-derived hierarchically porous carbon for supercapacitor electrodes with enhanced electrochemical performance

机译:MNO2纳米纳金属装载在氧化硅氧化物衍生的分层多孔碳上,用于具有增强的电化学性能的超级电容器电极

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摘要

Manganese oxide nanoneedle/carbide-derived carbon (MnO2/CDC) composite electrodes with hierarchically porous structure for supercapacitors have been obtained by a convenient hydrothermal technology. MnO2 nanoneedles are homogeneously grown on the surface of CDC obtained by etching silicon oxycarbide (SiOC) using sodium hydroxide (NaOH) according to a self-limiting reaction. The as-prepared MnO2/CDC composites posses: large specific surface area of 1749.3 m(2) g(-1), and facilitate to the enhancement of some certain pseudocapacitance. The MnO2/CDC composite electrodes show a high specific capacitance (255.8 F g(-1) at 1 A g(-1)) in a three electrode system. Additionally, MnO2/CDC electrodes are used to fabricate a symmetrical coin cell super capacitor. The device delivers the remarkable energy density of 12.6 Wh kg(-1) at a power density o 3997.7 W kg(-1) and still maintain 92.2% of the capacitance after 2000 cycles. The electrode materials preparec by combining CDC with transition metal oxide have great potential in supercapacitor applications.
机译:通过方便的水热技术获得了具有分层多孔结构的氧化锰纳米型/碳化物衍生的碳(MnO2 / CDC)复合电极。根据自限制反应,通过蚀刻氢氧化钠(NaOH)通过蚀刻氧化硅(SIOC)而在CDC表面上均匀生长MNO2纳尼。 AS制备的MNO2 / CDC复合材料具有:大比表面积为1749.3m(2)g(-1),并有助于提高一些某些假偶像码。 MnO2 / CDC复合电极在三个电极系统中显示出高比电容(255.8f g(-1)),在三个电极系统中为1 a g(-1))。另外,MNO2 / CDC电极用于制造对称硬币电池超级电容器。该装置以3997.7W kg(-1)的功率密度O 3997.7 W kg(-1)提供了12.6WH kg(-1)的显着能量密度,并在2000次循环后保持92.2%的电容。通过将CDC与过渡金属氧化物组合的电极材料加制备物在超级电容器应用中具有很大的潜力。

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