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Rapid synthesis of self-supported three-dimensional bubble-like graphene frameworks as high-performance electrodes for supercapacitors

Abstract

As one of the most desired alternatives for supercapacitor electrodes, three-dimensional graphene-based materials have attracted massive attention. However, they are still far from meeting the feasible and promising applications due to the low accessiable surface area, poor electrical conductivity, unavailable interconnected self-supported frameworks, as well as complicated fabrication process. Herein, we originally and rapidly fabricated self-supported three-dimensional bubble-like graphene frameworks via the simpler and greener photopolymerization, which can complete in few seconds. The obtained graphene frameworks feature interconnected bubble networks comprised of few-layered graphitic membranes, which are spatially and mutually supported. Besides, the simultaneously achieved huge available surface area, excellent conductivity, as well as superior wettability of graphene frameworks can ensure sufficient active sites and promote efficient ion transportation, which can synergistically result in the superior electrochemical performance when served as electrodes for supercapacitors. The resultant graphene-based supercapacitors exhibit high gravimetric capacitance of 277 F g-1 at 1 A g-1, remarkable rate-capability maintaining at a level of 85% even at 50 A g-1 and superior cycling stability with a 94% capacitance retention and ~100% Coulombic efficiency after 10000 cycles at 5 A g-1. A soft package symmetrical supercapacitor is also successfully assembled to power light-emitting diode lights to demonstrate the promising application of graphene frameworks. Therefore, the self-supported graphene bubble-networks overcome the defects of currently available graphene products and open avenues for fabricating high-performance, low-cost, high-quality graphene-based electrodes useful for supercapacitors.

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Publication details

The article was received on 06 Apr 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7SE00178A
Citation: Sustainable Energy Fuels, 2017, Accepted Manuscript
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    Rapid synthesis of self-supported three-dimensional bubble-like graphene frameworks as high-performance electrodes for supercapacitors

    H. Duan, T. Yan, Z. Li, G. Chen, J. Zhang, L. Shi and D. Zhang, Sustainable Energy Fuels, 2017, Accepted Manuscript , DOI: 10.1039/C7SE00178A

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