An Electrochemical Capacitor Electrode Based on Porous Carbon Spheres Hybrided with Polyaniline and Nanoscale Ruthenium Oxide

作者：Zhao, Dan; Guo, Xinying; Gao, Yue; Gao, Feng^*

来源：ACS Applied Materials & Interfaces, 2012, 4(10): 5583-5589.

DOI：10.1021/am301484s

• electrochemical capacitors
• porous carbon spheres
• polyaniline
• nanoscopic ruthenium oxide
• electropolymerization
• redox deposition

Nanoscopic ruthenium oxide (RuO2)/polyaniline (PANI)/carbon double-shelled hollow spheres (CS) composites, RuO2/PANI/CS, have been prepared via electro-polymerization of aniline and redox deposition of RuO2 on the surface of CS. The structures and morphologies of the resulting ternary composites are characterized using scanning electron microscopy (SEM), infrared spectroscopy (IR), energy-dispersive X-ray spectroscopy (EDX). The electrochemical properties of the ternary composites as active electrode materials for electrochemical capacitors have been investigated by different electrochemical techniques including cyclic voltammetry, galvanostatic charge-discharge, and impedance spectroscopy. The results show that the specific capacitance of RuO2/PANI/CS composites is 531 F g(-1) at 1 mA cm(-2) in 1.0 M H2SO4 electrolyte, which is higher than many other currently available ternary composites based on RuO2/PANI. At the same time, the composites display a good rate capability and 70% of the initial specific capacitance is retained with the charge-discharge current density up to 10 mA cm(-2).

• 出版日期2012-10
• 单位安徽师范大学