Abstract
Activated carbon (AC) particles sandwiched reduced graphene oxide sheets (rGO) film has been successfully fabricated via a facile self-assemble approach. The as-formed AC/rGO film is self-standing, flexible and mechanically robust, allowing to be transferred to any substrate on demand without rupture. Since AC particles effectively suppressed the restacking of the rGO sheet, AC/rGO film exhibits loose layer-by-layer stacking structures with various gaps between AC particles and rGO sheets, which is different from compact structures of pure graphene films. The as-formed gaps provide fast diffusion channels for electrolyte ions and enhanced accessible surface area of rGO. Therefore, the AC/rGO electrode delivers improved electrochemical performance over the voltage range of 0.0—3.0 V. This work offers a promising strategy to design free-standing supercapacitor electrodes based on traditional nanocarbon materials.
摘要
本文报道了活性炭插层石墨烯膜的自组装制备方法. 制备的复合碳膜兼具自支撑、 柔性和出色力学**度, 可按需无损转移到各种基材上. 由于活性炭颗粒有效抑制了石墨烯片的层层堆积, 因此复合碳膜展现出疏松多孔的层状结构, 这与石墨烯薄膜的致密结构不同. 碳膜层间多孔结构为电解质离子提供快速扩散通道, 并增加石墨烯膜的可利用表面积. 因此, 复合碳膜电极在 0.0~3.0 V 的电压范围内呈现出高比电容和出色的循环性能. 本研究为使用传统碳材料制造高性能柔性电极, 提供了一种简单高效的方法.
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ZHU Lian-wen, GU Li and LU Shao-rong conceived and designed the study. WU Yuan-yuan performed the experiments. ZHU Lian-wen edited the draft of manuscript. CHEN Ru-ting, GU Li, CAO Xue-bo and LU Shao-rong reviewed the whole manuscript. All authors replied to reviewer & apos; s comments and revised the final version.
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WU Yuan-yuan, ZHU Lian-wen, CHEN Ru-ting, GU Li, CAO Xue-bo and LU Shao-rong declare that they have no conflict of interest.
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Foundation item: Project(21673102) supported by the National Natural Science Foundation of China; Projects(LY18B010006, LQ19B030005) supported by the Natural Science Foundation of Zhejiang Province, China
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Wu, Yy., Zhu, Lw., Chen, Rt. et al. Self-assembled activated carbon sandwiched graphene film for symmetrical supercapacitors. J. Cent. South Univ. 27, 3603–3614 (2020). https://doi.org/10.1007/s11771-020-4505-9
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DOI: https://doi.org/10.1007/s11771-020-4505-9