CD Skripsi
Analisa Pemanfaatan Limbah Kedelai Sisa Pengolahan Tahu Sebagai Elektroda Superkapasitor
Utilization of soybean waste from tofu processing or tofu dregs as a basic material
in fabrication of supercapacitor cell electrodes has been successfully carried out
by varying types of activators using ZnCl2, NaOH and H3PO4. Activated carbon
from tofu dregs was prepared through several steps such as drying, precarbonization,
refining, chemical activation, pellet molding, carbonization and
physical activation using N2 and CO2 gases. Based on the density measurement,
the largest shrinkage is shown by the AT-ZnCl2 sample. The X-Ray Diffraction
(XRD) characterization results showed that there were 2 peaks with an angle of 2θ
at 22,571° - 25,875° and 43,895° - 44.174° , which indicate that the carbon
electrode has an amorphous structure. Scanning Electron Microscope (SEM)
characterization results showed the presence of carbon fibers in the AT-NaOH and
AT-ZnCl2 samples with sizes ranging from 54 – 285 nm and 83 – 162 nm. The
H3PO4 sample showed pores between particles with a size of 83 – 190 nm. The
EDX characterization results showed that the highest carbon content is found in
the AT-ZnCl2 sample of 91,80%. Measurement of electrochemical properties
(CV) obtained the highest specific capacitance value in the AT-ZnCl2 sample of
147.73 F / g. This shows that a good activator to be used in the process of making
carbon electrodes from tofu dregs is ZnCl2 activator.
Keywords: tofu dregs, activated carbon, activator type, supercapacitor, specific
capacitance
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