Issue 18, 2011

Controlled synthesis of hierarchical NiO nanosheet hollow spheres with enhanced supercapacitive performance

Abstract

In this work, we report a facile strategy for the controlled synthesis of nickel oxide (NiO) hollow spheres (HSs) assembled from nanosheets (NSs). The Ni2CO3(OH)2 NSs are first grown on sulfonated polystyrene (sPS) hollow spheres by a low-temperature solution route. NiO HSs with well preserved morphology are then obtained by calcining the as-prepared sPS@ Ni2CO3(OH)2 NSs composite HSs. Because of the hollow interior and hierarchical structure, these NiO nanosheet hollow spheres have a relatively high specific surface area of 62 m2 g−1. When evaluated for supercapacitive performance, these hierarchical NiO HSs demonstrate improved electrochemical properties with a high capacitance of 415 F g−1 even at a high charge–discharge current rate of 3 A g−1 and 91% of which can be retained after 1000 charge–discharge cycles.

Graphical abstract: Controlled synthesis of hierarchical NiO nanosheet hollow spheres with enhanced supercapacitive performance

Article information

Article type
Paper
Submitted
03 Jan 2011
Accepted
28 Feb 2011
First published
31 Mar 2011

J. Mater. Chem., 2011,21, 6602-6606

Controlled synthesis of hierarchical NiO nanosheet hollow spheres with enhanced supercapacitive performance

S. Ding, T. Zhu, J. S. Chen, Z. Wang, C. Yuan and X. W. (David) Lou, J. Mater. Chem., 2011, 21, 6602 DOI: 10.1039/C1JM00017A

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