Optimized Ratios of Activated Carbon and Multi-wall Carbon Nanotubes for Electrode Application

Abstract

In this work, the optimal ratio of coconut shell activated carbon and carbon nanotubes for application as electrode materials was investigated. Three ratios of coconut shell activated carbon and carbon nanotubes were studied as follows: 1:1, 1:3, and 1:5. The surface functional groups, the resistivity and capacity were investigated. This research found that the surface regions contained carbonyl and carboxyl functional groups. The resistance and capacitance values ​​for the ratios 1:1, 1:3 and 1:5 were 0.65 ohms and 66.21 millifarads, 0.75 ohms and 80.85 millifarads, and 0.75 ohms and 80.92 millifarads, respectively. The capacitance of the ratios of 1:3 and 1:5 have similar. The frequency increases, the capacitance decreases rapidly, unlike a ratio of 1:1 with relatively consistent capacitance. This is because the surface area has a double-bonded carbon functional group that contributes to greater than electrical conductivity compared to other ratios. A ratio of 1:1 shows the lowest resistivity, increasing the stability of the capacitance.