Issue 1, 2016

Asymmetric supercapacitors with high energy density based on helical hierarchical porous NaxMnO2 and MoO2

Abstract

Helical hierarchical porous NaxMnO2/CC and MoO2/CC, which are assembled from nanosheets and nanoparticles, respectively, are fabricated using a simple electrodeposition method. These unique helical porous structures enable electrodes to have a high capacitance and an outstanding cycling performance. Based on the helical NaxMnO2/CC as the positive electrodes and helical MoO2/CC as the negative electrodes, high performance NaxMnO2/CC//MoO2/CC asymmetric supercapacitors (ASCs) are successfully assembled, and they achieve a maximum volume Csp of 2.04 F cm−3 and a maximum energy density of 0.92 mW h cm−3 for the whole device and an excellent cycling stability with 97.22% Csp retention after 6000 cycles.

Graphical abstract: Asymmetric supercapacitors with high energy density based on helical hierarchical porous NaxMnO2 and MoO2

Supplementary files

Article information

Article type
Edge Article
Submitted
03 Sep 2015
Accepted
06 Oct 2015
First published
07 Oct 2015
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2016,7, 510-517

Author version available

Asymmetric supercapacitors with high energy density based on helical hierarchical porous NaxMnO2 and MoO2

X. Lu, Z. Huang, Y. Tong and G. Li, Chem. Sci., 2016, 7, 510 DOI: 10.1039/C5SC03326H

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