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Citation: YANG Jian-Jun, HUANG Jun-Jie, JIANG Zhi-Yu. Supercapacitance of MnO₂ Thin Film Electrodes Prepared Using Jet Printing Method[J]. Acta Physico-Chimica Sinica, ;2007, 23(09): 1365-1369. doi: 10.3866/PKU.WHXB20070911 shu

Supercapacitance of MnO₂ Thin Film Electrodes Prepared Using Jet Printing Method

1.
Shanghai Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, P. R. China

Received Date: 13 February 2007
Available Online: 12 June 2007

MnO2 particles in the size less than 200 nm were prepared via the oxidation of MnSO4 using KMnO4 as oxidizer. The printing‘ink’was prepared by mixing MnO2 particles with acetylene black, dispersion additive Lomar-D, ethanolamine, binder CMCS and distilled water in the mass ratio of 200:40:4:1:1:4000, and dispersing under ultrasonic. The ultra thin MnO2 film electrodes were prepared by means of computer jet printing technique using this‘ink’. The SEMimages showed that the surface of the ultra thin MnO2 filmelectrode was uniform, and its thickness was about 2.5 μm. In 1 mol·L-1 Li2SO4 solution the electrodes present typical electrochemical supercapacitance behavior observed by voltammetry and charge-discharge measurements, in the potential region of 0-0.85 V(vs SCE). Its specific capacitance reached to 154 F·g-1 at the discharge current of 9.4 A·g-1, and remained almost no change after 2000 cycles.
- MnO2; Ultra thin electrode; Jet printing; Supercapacitor
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Supercapacitance of MnO2 Thin Film Electrodes Prepared Using Jet Printing Method

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Supercapacitance of MnO₂ Thin Film Electrodes Prepared Using Jet Printing Method