期刊
CRYSTENGCOMM
卷 13, 期 2, 页码 626-632出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c002610g
关键词
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资金
- National Natural Science Foundation of China [20901072]
- University in Jiangsu [09KJD620001]
- 973 Project of China [2005CB623601]
In this work, various novel NiO hierarchical nanostructures, including mesoporous nanotubes by nanoparticles self-assembly, nanowire bundles, dandelions, hollow spheres by rods self-assembly, have been fabricated by a simple hydrothermal process and subsequent thermal decomposition at atmosphere. A detailed study of the effect of experimental parameters on the morphology is also presented. Results and analyses demonstrated that oxalic-acid/NaOH molar ratio has an immense function in the subtle morphology control of NiO products. Electrochemical characterization demonstrated that the mesoporous NiO nanotubes were capable of delivering a specific capacitance (SC) of 405 F g(-1) at the current density of 0.5 A g(-1) and offered good capacitance retention of ca. 91% after 1500 continuous charge-discharge cycles. This soundly indicates that as electrode material, the as-prepared NiO mesoporous nanostructures could meet key requirements in terms of large power density, outstanding rate capability and excellent electrochemical stability.
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