Hierarchical Dendritic Polypyrrole with High Specific Capacitance for High-performance Supercapacitor Electrode Materials.

التفاصيل البيبلوغرافية
العنوان:	Hierarchical Dendritic Polypyrrole with High Specific Capacitance for High-performance Supercapacitor Electrode Materials.
المؤلفون:	Weiliang Chen, Shuhua Pang, Zheng Liu, Zhewei Yang, Xin Fan, Dong Fang
المصدر:	Journal of New Materials for Electrochemical Systems; 2017, Vol. 20 Issue 4, p197-204, 8p
مصطلحات موضوعية:	POLYPYRROLE, DENDRITIC crystals, OXIDATION, FOURIER transform spectrometers, SCANNING electron microscopy, ELECTROCHEMISTRY
مستخلص:	Polypyrrole with hierarchical dendritic structures assembled with cauliflower-like structure of nanospheres, was synthesized by chemical oxidation polymerization. The structure of polyryrrole was characterized by Fourier transform infrared spectrometer and scanning electron microscopy. The electrochemical performance was performed on CHI660 electrochemical workstation. The results show that oxalic acid has a significant effect on morphology of PPy products. The hierarchical dendritic PPyOA(3) electrodes possess a large specific capacitance as high as 744 F/g at a current density of 0.2 A/g and could achieve a higher specific capacitance of 362 F/g even at a current density of 5.0 A/g. Moreover, the dendritic PPy products produce a large surface area on the electrode through the formation of the channel structure with their assembled cauliflower-like morphology, which facilitates the charge/electron transfer relative to the spherical PPy electrode. The spherical dendritic PPyOA(3) electrode has 58% retention of initial specific capacitance after 260 cycles. The asprepared dendritic polypyrrole with high performance is a promsing electrode material for supercapacitor. [ABSTRACT FROM AUTHOR]
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قاعدة البيانات:	Complementary Index

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