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Issue 28, 2014
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Rational design of graphene/porous carbon aerogels for high-performance flexible all-solid-state supercapacitors

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Abstract

Lightweight flexible energy storage devices have aroused great attention due to the remarkably increasing demand for ultrathin and portable electronic devices. As typical new two-dimensional carbon materials, graphene-based porous structures with ultra-light weight and exclusive electrochemical properties have demonstrated outstanding capacitive ability in supercapacitors. Thus far, the performance of all-solid-state supercapacitors achieved from graphene-based materials is still unsatisfactory. In this work, we have rationally designed graphene/porous carbon (GN/PC) aerogels via a simple green strategy to achieve flexible porous electrode materials. The ordered porous carbon (PC) with high specific surface area and good capacitance was introduced as a spacer to efficiently inhibit the restacking of graphene (GN) sheets, which significantly enhanced the specific surface area and facilitated the transport and diffusion of ions and electrons in the as-synthesized porous hybrid structure. The all-solid-state electrodes fabricated by the as-prepared GN/PC aerogels presented excellent flexibility, high specific capacitance and good rate performance in a polyvinyl alcohol/KOH gel electrolyte. Implication of the specific capacitances of ∼187 F g−1 at 1 A g−1 and 140 F g−1 at 10 A g−1 suggests that the GN/PC aerogels promise great potentials in the development of lightweight high-performance flexible energy storage devices.

Graphical abstract: Rational design of graphene/porous carbon aerogels for high-performance flexible all-solid-state supercapacitors

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Article information


Submitted
30 Jan 2014
Accepted
27 Mar 2014
First published
28 Mar 2014

J. Mater. Chem. A, 2014,2, 10895-10903
Article type
Paper
Author version available

Rational design of graphene/porous carbon aerogels for high-performance flexible all-solid-state supercapacitors

H. Ju, W. Song and L. Fan, J. Mater. Chem. A, 2014, 2, 10895
DOI: 10.1039/C4TA00538D

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