▎ 摘　　要

NOVELTY - Synthesizing reduced graphene oxide (rG0)/polyaniline (PANI) composite coating on solid substrate involves immersing substrate in an aqueous solution of rGO, aniline and ammonium persulfate (APS) ((NH4)2S208) to form rGO/PANI coating on the surface of the substrate. The concentration of aniline is between 0.1-0.5 M. The concentration of APS is between 0.05-0.5 M. The concentration of sulfuric acid is 1 M where the pH of the cationic solution is between 1±0.1 to 3±0.1 and pH of 'the anionic solution is between 2±0.1 to 5±0.1. The number of deposition cycles varies from 20 to 50. USE - Method for synthesizing reduced graphene oxide/polyaniline composite coating on solid substrate used in an electrochemical energy storage device with specific capacitance of 1441 Farad/g (claimed). ADVANTAGE - The method enables to produce nanostructured rGO/PANI composite by optimizing preparative pararneters. The rGO is introduced due to its unique properties like layer structure, higher conductivity, high theoretical specific surface area, and excellent mechanical strength which enhances the supercapacitive performance of composite coating. The method also enables to produce rGO/PANI coating on large area solid surfaces useful for various advanced applications such as water splitting, solar cells, gas sensors, and supercapacitors.