Issue 41, 2015

Stackable, three dimensional carbon–metal oxide composite for high performance supercapacitors

Abstract

We report a stackable all-solid-state supercapacitor based on three dimensional PPy–NiO/RGO–CNT electrodes. The electrodes were prepared by growing NiO nanowalls (NWs) on both sides of a freestanding RGO–CNT film with the hydrothermal method, followed by coating with conductive polypyrrole. The double-sided architecture of the NiO NWs on a carbon-based current collector suggests that the novel approach addresses the issue of low areal capacitance in supercapacitors. Furthermore, conductive polypyrrole renders fast electron transport through the two-dimensional structure of NiO NWs. With our 3D-designed electrodes, we successfully fabricated a stackable all-solid-state supercapacitor and thus achieved a high areal capacitance of 1948 mF cm−2.

Graphical abstract: Stackable, three dimensional carbon–metal oxide composite for high performance supercapacitors

Supplementary files

Article information

Article type
Communication
Submitted
10 aug 2015
Accepted
17 sep 2015
First published
18 sep 2015

J. Mater. Chem. A, 2015,3, 20459-20464

Stackable, three dimensional carbon–metal oxide composite for high performance supercapacitors

J. H. Kim, S. Lee, J. Choi, T. Song and U. Paik, J. Mater. Chem. A, 2015, 3, 20459 DOI: 10.1039/C5TA06266G

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