To obtain the highest performance of supercapacitive properties, it is necessary to discover an appropriate pair of electrode material and electrolyte. Supercapacitors have many applications in the industry over batteries, and our result shows the advantages of low-cost polyaniline (PANI) electrode material in supercapacitors. In the present work, the polyaniline nanofibers (PANINFs) thin films can be directly used as an electrode for supercapacitor. PANINFs electrode showed maximum specific capacitance of 633F/g which exhibited at 5mV/s scan rate, the specific energy density of 45.67Wh/kg, the power density of 500W/kg and the coulomb efficiency of 85.59% at 0.5mA/cm(2) current density with 0.32 Omega equivalent series resistance(ESR) value. The capacitance value is obtained by electrochemical impedance spectroscopy(EIS) of 20.33mF/cm(2) with the relaxation time of 0.14s. Nanofibrous network (50-60nm diameter) confirmed hydrophilic nature by wettability test. From the supercapacitive performance of PANINFs thin films conclude that they are promising for energy storage application. [GRAPHICS] .