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Issue 2, 2012
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Synthesizing MnO2nanosheets from graphene oxide templates for high performance pseudosupercapacitors

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Abstract

A facile method to synthesize layered manganese oxide nanosheets was developed for the first time by using graphene oxide as a template. The in situ replacement of carbon atoms on the graphene oxide framework by edge-shared [MnO6] octahedra provides a new methodology to synthesize graphene-based two-dimensional nanomaterials. The transformation of graphene oxide into δ-type MnO2 nanosheets results in an especially high surface area (157 m2 g−1), which is the highest value amongst today's MnO2 nanomaterials. Moreover, the MnO2 nanosheets demonstrated prominent capacitance (∼1017 F g−1 at a scan rate of 3 mV s−1, and ∼1183 F g−1 at a current density of 5 A g−1) and remarkable rate capability (∼244 F g−1 at a high scan rate of 50 mV s−1 and ∼559 F g−1 at a high current density of 25 A g−1), indicating their promise in high energy and power density pseudosupercapacitors.

Graphical abstract: Synthesizing MnO2 nanosheets from graphene oxide templates for high performance pseudosupercapacitors

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Article information


Submitted
26 Sep 2011
Accepted
13 Oct 2011
First published
14 Oct 2011

Chem. Sci., 2012,3, 433-437
Article type
Edge Article

Synthesizing MnO2 nanosheets from graphene oxide templates for high performance pseudosupercapacitors

G. Zhao, J. Li, L. Jiang, H. Dong, X. Wang and W. Hu, Chem. Sci., 2012, 3, 433
DOI: 10.1039/C1SC00722J

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