Issue 12, 2013

Self-assembled three-dimensional interpenetrating porous graphene aerogels with MnO2 coating and their application as high-performance supercapacitors

Abstract

In this work, a hybrid materials of MnO2-wrapped graphene aerogels (GAs) were prepared using a simple in situ reduction method. The porous GAs obtained in our work not only boost ion and electron movement in electrochemical processes but can also serve as a 3D skeleton for combining with MnO2, which allows the poor electronic conductivity of MnO2 nanoparticles to be wired up to a current collector through the underlying GA conducting layers. As a supercapacitor electrode material, the structure exhibits a high reversible capacity of 210 F g−1 at a current density of 0.5 A g−1 with an excellent cycling retention of 99% after the 800th cycle at a current density of 2 A g−1. These results highlight the importance of anchoring MnO2 on GAs for maximum utilization of the electrochemical activity and retaining the good electrochemical stability of the electrode materials.

Graphical abstract: Self-assembled three-dimensional interpenetrating porous graphene aerogels with MnO2 coating and their application as high-performance supercapacitors

Article information

Article type
Paper
Submitted
06 Jun 2013
Accepted
20 Sep 2013
First published
16 Oct 2013

New J. Chem., 2013,37, 4199-4205

Self-assembled three-dimensional interpenetrating porous graphene aerogels with MnO2 coating and their application as high-performance supercapacitors

C. Ji, M. Xu, S. Bao, Z. Lu, C. Cai, H. Chai, R. Wang, F. Yang and H. Wei, New J. Chem., 2013, 37, 4199 DOI: 10.1039/C3NJ00599B

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