Pepper peel waste is one of the byproducts of pepper production, especially in the Province of Bangka Belitung Islands. One of the efforts to utilize pepper peel, which is used as an activated carbon material that can be used as supercapacitor electrodes, has been carried out. Activated carbon based on pepper peel is synthesized by drying it to dry and then pre-carbonization. The next step is chemical activation using ZnCl2 and followed by physical activation at 700 °C in nitrogen flow conditions (N2) for 3 hours. Characterization of activated carbon material was carried out using SEM-EDX and BET, while the electrode performance used CV (Cyclic Voltamettry). The SEM-EDX and BET test results show that the activated carbon material has a porous structure with an average pore diameter of 2.059 nm. The CV test results were used to determine the energy storage capability with a specific capacitance value of 7.77 F/g at a scan rate of 1 mV/s.
The manufacture of battery cathode electrodes made of LiFeO4 and activated carbon from pepper peel has been successfully carried out. The electrodes were made using the soli state reaction method with the addition of adhesives in the form of PVdf and NMP. The resulting homogeneous mixture is then placed in a mold and dried in an oven at 90° to dry to form sheets. The dried electrode sheets were then characterized using FTIR and tested for conductivity values using EIS. The FTIR results showed that there was no change in the functional group with the addition of carbon mass. Meanwhile, the results of the conductivity test showed that the optimum conductivity value occurred in the sample with the addition of 10% carbon mass is 7.42 × 10-4 S/cm.
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