Surface Modification of Carbon Electrodes for Supercapacitor Using Ammonia Water

Abstract:

In this work, activated carbon was modified by ammonia water. Cyclic voltammetry and constant current charge-discharge were used to characterize the electrochemical performance of the samples in 1.0 mol/L Et₄NBF₄-PC solution. As a result, optimal conditions for surface modification of activated carbon have been examined as an ammonia solution concentration of 5wt.%. Specific capacitance can be improved significantly by surface modification of carbon materials. The specific capacitance of the carbon modified with 5.0wt.% ammonia water reached 114 F/g at a current density of 3.0 mA/cm2, which is 14% higher than that of untreated sample. In addition, the modified carbon materials possess excellent power performance.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 1265-1268
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.1265
• Online since: November 2011
• Authors: Ren Qing Wang, Mei Gen Deng
• Keywords: Activated Carbon (AC), Modification, Specific Capacitance

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