Porous reduced graphene oxide paper as a binder-free electrode for high-performance supercapacitors

Porous reduced graphene oxide paper as a binder-free electrode for high-performance supercapacitors
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多孔还原氧化石墨烯纸作为高性能超级电容器的无粘合剂电极

DOI:
10.1039/c5ra03717d
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发表时间:
2015-03
期刊:
影响因子:
3.9
通讯作者:
Peng, Xinsheng
Peng, Xinsheng
中科院分区:
化学3区
文献类型:
--
作者:
Ying, Yulong;Mao, Yiyin;Hua, Pan;Peng, Xinsheng

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发展了一种简易的模板法来制备具有分级多孔结构的高导电性和柔性的还原氧化石墨烯(rGO)纸。当用作电容器的电极时,这些多孔碳层由于其大的离子可及表面积和有效的电解质-离子传输途径而表现出增强的电化学性能。多孔rGO电极的比容量为173.5 F g-1,几乎是填充rGO的95.1 F g-1的1.8倍。更重要的是,该多孔电极还表现出良好的电化学性能,能量密度为28.5 W h kg-1,功率密度为4000 W kg-1,以及优异的循环稳定性,在5A g-1的电流密度下进行2000次充放电循环后,其初始电容为101.5%。
A facile template approach is developed to prepare highly conductive and flexible reduced graphene oxide (rGO) paper with hierarchical porous structures. When used as an electrode for a capacitor, these porous carbon layers demonstrate an enhanced electrochemical performance due to their large ion-accessible surface area and efficient electrolyte-ion transport pathways. The porous rGO electrode delivers a specific capacity of 173.5 F g−1, almost 1.8 times higher than 95.1 F g−1 of packed rGO. More importantly, the porous electrode also exhibits a good electrochemical performance with an energy density of 28.5 W h kg−1 and power density of 4000 W kg−1, as well as excellent cycling stability with 101.5% of its initial capacitance after 2000 charge–discharge cycles at a current density of 5 A g−1.
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影响因子: 29.4
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