Nitric Acid Activated Carbon Aerogels for Supercapacitors

Abstract:

The electrochemical performances of resorcinol–formaldehyde-based carbon aerogels can be significantly enhanced by nitric acid activation.FT-IR spectra and SEM images reveal the constitution and morphology of samples .The electrochemical performances of materials were tested by cyclic voltammetry,galvanostatic charge/discharge test ,electrochemical impedance spectroscopy and cyclic test. The results show that activation does not influence the molecular structure of carbon aerogels,which maintains their nano-porous structure. Activation increases the specific capacitance by 50% and improves the conductivity of carbon aerogels,resulting in fenfect cycling stability. So nitric acid activated carbon aerogels is an ideal electrode material for supercapacitors.

• Periodical: Applied Mechanics and Materials (Volume 302)
• Pages: 158-164
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.302.158
• Online since: February 2013
• Authors: Ya Jie Li, Xing Yuan Ni, Jun Shen, Dong Liu, Nian Ping Liu
• Keywords: Carbon Aerogels, Electrochemical Performance, Nitric Acid Activation, Super-Capacitor (SC)

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