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Citation: TANG Yanru, CHENG Baohai, GAO Ying, LI Yunhui. Three-dimensional Nanocomposite Array Supercapacitor Electrode Based on the Synergistic Effects of Manganese Dioxide and Metallorganic Frameworks[J]. Chinese Journal of Applied Chemistry, ;2014, 31(8): 977-982. doi: 10.3724/SP.J.1095.2014.30518 shu

Three-dimensional Nanocomposite Array Supercapacitor Electrode Based on the Synergistic Effects of Manganese Dioxide and Metallorganic Frameworks

TANG Yanru ^a,, ,
CHENG Baohai ^a ,
GAO Ying ^b ,
LI Yunhui ^b

1.
a Faculty of Chemistry, Changchun Normal University, Changchun 130031, China;
2.
b School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China

Corresponding author: TANG Yanru,
Received Date: 18 October 2013
Available Online: 9 December 2013
Fund Project: 长春市科技局资助项目(2011-43) (2011-43)

ZnO-MnO₂-MOF(metalloriganic frameworks) nanocomposite array electrode was fabricated by multi-step chronopotentiometry and standing without disturbance,in which zinc nitrate,manganese nitrate and hexamethylenetetramine were the raw materials. The morphology and structure of the composite were investigated by scanning electron microscopy,transmission electron microscope,X-ray photoelectron spectroscopy,and X-ray diffraction,respectively. The electrochemical properties of the electrode were studied by cyclic voltammetry,galvanostatic charge-discharge,and electrochemical impedance spectroscopy in 0.5 mol/L sodium sulfate. The results show that,in comparison with ZnO-MnO₂ composite(C_sp=121 F/g,j=2.5 A/g),ZnO-MnO₂-MOF nanocomposite array electrode shows a lower internal resistance,a higher reversible Faradic reaction,and a better rate performance owing to synergistic effects between MnO₂ and MOF,and its specific capacitance(C_sp=146 F/g,j=2.5 A/g) is 20% higher than that of the ZnO-MnO₂ composite.
- manganese dioxide,
- metallorganic frameworks,
- supercapacitor,
- electrodeposition,
- nanocomposite electrode
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