Issue 15, 2015

MnO2 nanostructures with three-dimensional (3D) morphology replicated from diatoms for high-performance supercapacitors

Abstract

Herein, we demonstrate the synthesis of size- and shape-controlled MnO2 nanostructures by replica molding from diatom silica structures for high-performance supercapacitors. Three types of hierarchical hollow MnO2 patterns with different three-dimensional (3D) structures, shapes and large surface areas were successfully prepared from three diatom species by a template-assisted hydrothermal process. The extraordinary precision and nano-scale resolution of 3D replications of complex biological architecture from diatoms to artificial MnO2 structures are confirmed. Detailed electrochemical measurements reveal that the Melosira-type MnO2 pattern exhibits not only a high specific capacitance of 371.2 F g−1 at a scan rate of 0.5 A g−1, but also relatively good cycle stability (93.1% capacitance retention after 2000 cycles at a scan rate of 5 A g−1), demonstrating a promising application as supercapacitor electrode materials.

Graphical abstract: MnO2 nanostructures with three-dimensional (3D) morphology replicated from diatoms for high-performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
26 1月 2015
Accepted
25 2月 2015
First published
25 2月 2015

J. Mater. Chem. A, 2015,3, 7855-7861

Author version available

MnO2 nanostructures with three-dimensional (3D) morphology replicated from diatoms for high-performance supercapacitors

F. Li, Y. Xing, M. Huang, K. L. Li, T. T. Yu, Y. X. Zhang and D. Losic, J. Mater. Chem. A, 2015, 3, 7855 DOI: 10.1039/C5TA00634A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements