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Porous reduced graphene oxide wrapped carbon nanotube-manganese dioxide nanocables with enhanced electrochemical capacitive performance

机译:多孔还原氧化石墨烯包裹的碳纳米管-二氧化锰纳米电缆,具有增强的电化学电容性能

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摘要

MnO2 has ultra-low conductivity for electrodes of supercapacitors. In this research, porous reduced graphene oxide (rGO) wraps on MnO2 nanoflowers with a conductive carbon nanotube core (CNTMnO2). This nanostructure could effectively improve the surface and inner conductivity of the composites. Unlike pristine rGO, the porous rGO does not block the diffusion of electrolyte into the inner part of the composites, which allows the utilization of MnO2 in this composite capacitor very well. As a result, the as-prepared CNT-MnO2-porous rGO ternary hybrid material shows superior specific capacitance and rate performance to pristine CNT-MnO2 nanocables and pristine rGO wrapped CNTMnO2 nanocables. This synthesis strategy could be valuable for the design of better performance pseudocapacitive electrodes for supercapacitors.
机译:MnO2对超级电容器的电极具有极低的电导率。在这项研究中,多孔还原氧化石墨烯(rGO)用导电碳纳米管核(CNTMnO2)包裹在MnO2纳米花上。这种纳米结构可以有效地改善复合材料的表面和内部导电性。与原始rGO不同,多孔rGO不会阻止电解质扩散到复合材料的内部,这使得该复合电容器中MnO2的利用非常好。结果,所制备的CNT-MnO 2-多孔rGO三元杂化材料显示出比原始的CNT-MnO 2纳米电缆和原始的rGO包裹的CNTMnO 2纳米电缆优异的比电容和速率性能。这种合成策略对于设计性能更好的超级电容器伪电容电极可能是有价值的。

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