期刊
ELECTROCHIMICA ACTA
卷 125, 期 -, 页码 586-592出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.01.144
关键词
Nanomaterials; NiO; Supercapacitors; Electrochemical properties
资金
- National Natural Science Foundation of China [21076056]
- Key Project of Chinese Ministry of Education [210010]
- Ph.D. Programs Foundation of Ministry of Education of China [20091317120005]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- State Education Ministry
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) [IRT1059]
- Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering & Technology, Hebei University of Technology
The NiO nanoparticles were synthesized at different temperatures using a simple hydrothermal precipitation method and then calcined at 400 degrees C for 2 h. The morphology, crystalline structures and functional groups of nano NiO materials were investigated by SEM, XRD and FT-IR, respectively. Electrochemical properties were examined by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and cyclic charge-discharge tests. The results showed that the particle size of nano NiO was around 10 nm and dependent of temperature in the range of 120-180 degrees C. Their specific capacitance achieved to 630 F/g at the scan rate of 5 mV/s (vs. Hg/HgO). The cycling test results showed that nano NiO exhibited good cycling performance after 500 cycles. (C) 2014 Elsevier Ltd. All rights reserved.
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