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Tensile force induced tearing and collapse of ultrathin carbon shells to surface-wrinkled grape skins for high performance supercapacitor electrodes

Abstract

With glucose as highly accessible carbon source, mesoporous carbon nano grape skins were successfully fabricated via a facile template-based hydrothermal method and subsequently tensile force induced tearing and collapse. The resulting carbon nano grape skins possess a novel structure as a nanosheet rolled up or folded from the around, which maintains the ultrathin properties of nanosheets. However, unlike carbon nanosheets, which are prone to aggregate or restack, the carbon nano grape skins were separated from each other due to the crimp force induced by the rolled side. A largest specific surface area of 1570.9 m2 g-1 and total pore volume of 2.429 m3 g-1 were achieved for the product obtained at 600 C. When was used as electrode materials for supercapacitors, the products obtained at 700 C showed a much higher specific capacitance of 268 F g-1 at 0.1 A g-1, a higher rate specific capacitance of 170 F g-1 at 10 A g-1, and a more excellent cycling stability with a 94.2 % capacitance retention after 10000 cycles at 2 A g-1 in a two-electrode system than that of carbon nanosheets and carbon hollow spheres obtained at 700 C.

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Publication details

The article was received on 10 Apr 2017, accepted on 09 Jun 2017 and first published on 09 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA03113K
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Tensile force induced tearing and collapse of ultrathin carbon shells to surface-wrinkled grape skins for high performance supercapacitor electrodes

    G. Zhang, J. Zhang, Q. Qin, Y. Cui, W. Luo, Y. Sun, C. Jin and W. Zheng, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA03113K

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