Issue 28, 2014

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

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

Supplementary files

Article information

Article type
Paper
Submitted
29 ربيع الأول 1435
Accepted
26 جمادى الأولى 1435
First published
27 جمادى الأولى 1435

J. Mater. Chem. A, 2014,2, 10895-10903

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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