Pseudo-capacitance properties of porous metal oxide nanoplatelets derived from hydrotalcite-like compounds |
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| Authors: | Jun Wang Hao Qin Jia You Zhanshuang Li Piaoping Yang Xiaoyan Jing Milin Zhang Zhaohua Jiang |
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| Affiliation: | (1) School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China;(2) The 49th Research Institute of China Electronics Technology Group, Harbin, 150001, China;(3) College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, People’s Republic of China; |
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| Abstract: | Nanoplatelets of metal oxides with interesting porous structure were obtained by thermal treatment of Ni/Al hydrotalcite.
Structural and surface properties of the porous oxides were characterized by X-ray diffraction (XRD), transmission electron
microscopy (TEM and HRTEM), and N2 adsorption–desorption. The electrochemical performance of the electrodes was investigated by cyclic voltammetry, electrochemical
impedance spectroscopy and constant current charge–discharge measurements. Ni/Al hydrotalcite calcined at 450 °C (NA-450)
displayed a maximum specific capacitance (419.0 F g−1) due to the porous structure with the highest specific surface area (142.3 m2 g−1) and small pore size (4.4 nm). The present study shows the potential of NiO nanoplatelets composite material for electrochemical
pseudo-capacitors. |
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