Journal
DALTON TRANSACTIONS
Volume 45, Issue 34, Pages 13311-13316Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt01791f
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Funding
- National Natural Science Foundation of China [21471086]
- Social Development Foundation of Ningbo [2014C50013]
- projects for graduate student research and innovation fund of Ningbo university [G15007]
- K. C. Wong MagnaFund in Ningbo University
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Nanorods-composed yolk-shell bimetallic-organic frameworks microspheres are successfully synthesized by a one-step solvothermal method in the absence of any template or surfactant. Furthermore, hierarchical double-shelled NiO/ZnO hollow spheres are obtained by calcination of the bimetallic organic frameworks in air. The NiO/ZnO hollow spheres, as supercapacitor electrodes, exhibit high capacitance of 497 F g(-1) at the current density of 1.3 A g(-1) and present a superior cycling stability. The superior electrochemical performance is believed to come from the unique double-shelled NiO/ZnO hollow structures, which offer free space to accommodate the volume change during the ion insertion and desertion processes, as well as provide rich electroactive sites for the electrochemical reactions.
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