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Preparation and Electrochemical Characterization of Mn/Pb Composite Oxides for Supercapacitors

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Abstract:

Mn/Pb composite oxides were prepared by solid-state reaction by KMnO4 with manganese acetate and lead acetate at low temperature. The products were characterized by XRD and TEM. The results show that the composite oxides are nano-size and amorphous structure. Electrochemical characterizations were performed by cyclic voltammetry (CV) and constant current charge-discharge in a three-electrode system. The potential windows of Mn/Pb composite oxides electrode are increased. With increasing the ratio of Pb, the specific capacitance goes through a maximum at 20% mol Pb. The specific capacitance of pure MnO2 is 158 F/g and is improved to 180 F/g for the Mn0.8Pb0.2Ox composite oxide by constant current discharge.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

470-473

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.470

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Online since:

April 2007

Authors:

Zhian Zhang, Yan Qing Lai, Jie Li, Ye Xiang Liu

Keywords:

Electrode Material, Solid-State Reaction, Specific Capacitance, Super-Capacitor (SC)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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