Fabrication and Characterization of MWCNT/ACF Web Electrode Using a Wet-laid Process
Vol. 56, No. 6, pp. 342-349,
Dec. 2019
10.12772/TSE.2019.56.342
PDF
Abstract
Carbon materials are among the most critical to energy storage in the world.
Multi-walled carbon nanotube(MWCNT), in particular, have been used extensively in electronic
devices owing to their aspect ratio, strength, and electrical properties. Recently, activated
carbon fiber(ACF) have attracted attention as an electrode material because of their
large surface area. Therefore, this study utilized MWCNTs and ACFs to fabricate an electrode
via the wet-laid process. The MWCNT and MWCNT/ACF web electrode surface were
observed using a field emission scanning electron microscope(FE-SEM). Raman spectroscopy
was utilized to determine that the carbon materials had no significant defects. The
electro-conductivity of each carbon material and web electrode was measured via the
four-probe method, and the electro-conductivity of MWCNT/ACF web electrode was
observed to lie between those of the MWCNT and ACF. Cyclic voltammetry tended to
pseudo capacitor behavior, and maximum discharge time was determined to be 156.9 s
using the galvanic charge and discharge test. The maximum specific capacitance of the
MWCNT/ACF electrode was 55.3 F/g. The result of electrochemical test indicated that the
composite carbon material displayed a synergistic effect that improved the specific capacitance.
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