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Controlling the nanoscale morphology and structure of the ZnO/MnO2 system for efficient transparent supercapacitors

Published online by Cambridge University Press:  21 March 2017

M. A. Borysiewicz Open the ORCID record for M. A. Borysiewicz [Opens in a new window] ,
M. Wzorek ,
M. Ekielski ,
J. Kaczmarski  and
T. Wojciechowski
M. A. Borysiewicz*
Affiliation:
Institute of Electron Technology, al. Lotników 32/46, 02-668 Warsaw, Poland
M. Wzorek
Affiliation:
Institute of Electron Technology, al. Lotników 32/46, 02-668 Warsaw, Poland
M. Ekielski
Affiliation:
Institute of Electron Technology, al. Lotników 32/46, 02-668 Warsaw, Poland
J. Kaczmarski
Affiliation:
Institute of Electron Technology, al. Lotników 32/46, 02-668 Warsaw, Poland
T. Wojciechowski
Affiliation:
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
*
Address all correspondence to M. A. Borysiewicz at mbory@ite.waw.pl
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Abstract

We discuss relationships between transparent supercapacitor performance and the morphology of its ZnO nanostructured electrodes. The electrodes with different morphologies were prepared by magnetron sputtering and postdeposition annealing. They were decorated with MnO2 nanostructures and tested in symmetric transparent supercapacitors. The capacitances for discharging at 10 µA/cm2 were in the range of 20–53 µF/cm2, meaning that an increase of 250% in capacitance can be obtained by optimizing the electrode morphology. Optimal morphologies were hierarchical with a large range of pore sizes available. The worst performing had the smallest range of pore sizes. Best devices exhibited transparencies above 90%.

Type
Research Letters
Information
MRS Communications , Volume 7 , Issue 2 , June 2017 , pp. 173 - 178
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Copyright
Copyright © Materials Research Society 2017 

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