Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7740910 | Journal of Power Sources | 2013 | 8 Pages |
Abstract
A novel ternary composite of sulfonated graphene/MnO2/polyaniline (sGMOPANI) is synthesized via a dilute in-situ polymerization method using potassium permanganate as oxidant under neutral condition. The FE-SEM and HRTEM images show that MnO2/polyaniline nanoparticles with the diameter of 5-10Â nm deposit onto sulfonated graphene nanosheets. Spectral analysis reveals the existence of the hydrogen bond and Ï-Ï interaction between MnO2/polyaniline nanoparticles and sulfonated graphene. As a result, the sGMOPANI composite based on the two-electrode cell shows improved electrochemical capacitance (276Â FÂ gâ1 at 1Â gâ1 in 1Â M Na2SO4), better rate capability (73% capacitance retention from 0.2 to 20Â AÂ gâ1), and higher cycling stability (11.7% capacitance loss after 3000 cycles) compared to the MnO2/polyaniline binary composite.
Related Topics
Physical Sciences and Engineering
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Authors
Guangxiang Wang, Qianqiu Tang, Hua Bao, Xingwei Li, Gengchao Wang,