Journal
CRYSTENGCOMM
Volume 15, Issue 38, Pages 7657-7662Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ce40824h
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Funding
- National Natural Science Foundation of China [21073001, 21005001]
- Key Project of Chinese Ministry of Education [209060]
- Anhui Provincial Natural Science Foundation [1208085QB28]
- Natural Science Foundation of Anhui [KJ2012A139]
- Program for Innovative Research Team at Anhui Normal University
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A facile and mild approach was used for the controlled synthesis of 3D porous gear-like CuO on a Cu substrate (PGC) based on annealing gear-like Cu(OH)(2) (GC) at 200 degrees C in air. There are 3-10 edges that build up a gear-like structure and a huge number of holes formed on each edge. As an integrated nanostructure, the binder-free PGC can be used as a supercapacitors electrode (SC) directly. Due to its 3D porous structure and the highly conductive Cu substrate as a current collector, the integrated electrode exhibited excellent electrochemical properties. These were demonstrated by excellent specific capacitance as high as 348 F g(-1) at a discharge current density of 1 A g(-1), which corresponds to the energy density of 43.5 Wh kg(-1). The electrochemical tests also showed that the as-synthesized PGC exhibited excellent cycling stability.
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