Abstract:
The effects of variation ZnCl2 mass ratio to the density and specific capacitance of
supercapacitor based activated carbon from Rubber Wood Saw Dust (RWSD) using physical
and chemical activations has been studied. Physical activation was done by using CO2 gas at
a temperature of 900 °C for 2 hours. Chemical activation using an activator substance of
ZnCl2 solution way carried out. Mass ratio of carbon and ZnCl2 was 1:1, 1:3, 1:5 and 1:7
namely M1, M2, M3 and M4. The pre-carbonization of carbon RWSD ion carried out for 2
hours at a temperature of 250 °C, the sample was then ball milled for 20 hours, sieved with a
grain size of 100 μm and then was activated by chemical activation. Results show that the
density measurement electrode density values in M2, M3, and M4 increased by increasing the
ratio of ZnCl2 solution, while the M1 is larger than M2 caused when carbonization is not
perfect so that oxygen is not wasted bonded to the carbon causes an increase in the mass and
density of the electrode. Specific capacitance values was calculated using cyclic voltammetry
experiencing overload and the resulted the value of specific capacitance on high an 53.58 Fg-1
(M1), 65.69 Fg-1 (M2), 60.02 Fg-1 (M3), and 55.08 Fg-1 (M4).
