Issue 44, 2019

Formation of Co–Mn mixed oxide double-shelled hollow spheres as advanced electrodes for hybrid supercapacitors

Abstract

Complex hollow nanostructures have attracted tremendous attention as advanced electrode designs for high-performance hybrid supercapacitors. Delicate control of the interior configuration is quite challenging but critical to the performance optimization of hollow nanostructures. In this work, we have developed a facile self-templated strategy for the construction of Co–Mn mixed oxide double-shelled hollow spheres (Co–Mn-DHSs). The transformation from the solid precursor to this unique hollow structure is achieved through a redox reaction mediated Ostwald ripening process. Of note, this protocol could be extended to synthesize other metal oxide hollow architectures with similar structural features. As a battery-type electrode in alkaline solution, the crystalline Co–Mn-DHS sample after annealing treatment manifests remarkable electrochemical properties in terms of high specific capacitance and good cycling stability. Moreover, the derived hybrid supercapacitor device shows enhanced energy/power densities with long life.

Graphical abstract: Formation of Co–Mn mixed oxide double-shelled hollow spheres as advanced electrodes for hybrid supercapacitors

Supplementary files

Article information

Article type
Communication
Submitted
30 May 2019
Accepted
03 Sep 2019
First published
04 Sep 2019

J. Mater. Chem. A, 2019,7, 25247-25253

Formation of Co–Mn mixed oxide double-shelled hollow spheres as advanced electrodes for hybrid supercapacitors

Y. Guo, C. Wu, N. Li, S. Yuan and L. Yu, J. Mater. Chem. A, 2019, 7, 25247 DOI: 10.1039/C9TA05790K

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