The purpose of this research is to synthesize carbon nanofiber from pineapple leaf fibers as supercapacitor carbon electrodes. The synthesis of carbon nanofiber was carried out using two steps, namely KOH concentration variations and a combination of pineapple leaf fibers with pineapple leaves. The first step was to vary KOH concentration of 0.3 M, 0.5 M, 0.7 M, and 0.9 M. The best KOH concentr…