Issue 10, 2011
From the journal:

Energy & Environmental Science

A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes†

Jintao Zhang,a   Jianwen Jiang,a   Hongliang Lib  and  X. S. Zhao*ab  

* Corresponding authors

a Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore
E-mail: chezxs@nus.edu.sg
Fax: +65 67791936
Tel: +65 65164727

b Institute of Multifunctional Materials (IMM), Laboratory of New Fiber Materials and Modern Textile, Qingdao University, Qingdao 266071, P. R. China

Abstract

An asymmetric supercapacitor (ASC) was fabricated using reduced graphene oxide (RGO) sheets modified with ruthenium oxide (RGO–RuO2) or polyaniline (RGO–PANi) as the anode and cathode, respectively. The ASC exhibited a significantly improved capacitive performance in comparison with that of the symmetric supercapacitors fabricated with RGO–RuO2 or RGO–PANi as the electrodes. The improvement was attributed to the broadened potential window in an aqueous electrolyte, leading to an energy density of 26.3 W h kg−1, about two-times higher than that of the symmetrical supercapacitors based on RGO–RuO2 (12.4 W h kg−1) and RGO–PANi (13.9 W h kg−1) electrodes. In addition, a power density of 49.8 kW kg−1 was obtained at an energy density of 6.8 W h kg−1.

Graphical abstract: A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes

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Article information

DOI
https://doi.org/10.1039/C1EE01354H
Article type
Paper
Submitted
25 Mar 2011
Accepted
14 Jun 2011
First published
02 Aug 2011

Energy Environ. Sci., 2011,4, 4009-4015

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A high-performance asymmetric supercapacitor fabricated with graphene-based electrodes

J. Zhang, J. Jiang, H. Li and X. S. Zhao, Energy Environ. Sci., 2011, 4, 4009 DOI: 10.1039/C1EE01354H

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