A green approach of chitosan modified graphene/polyaniline nanocomposites and lignin modified graphene/polyaniline nanocomposites were prepared by using modified Hummer method from graphite flakes. Physical adsorption of chitosan and lignin on exfoliated graphene oxide (GO), further reduced by hydrazine hydrate and in-situ polymerized in the presence of aniline monomer. Chitosan, a biodegradable linear polysaccharide, acts as a stabilizer to cope graphene oxide not to restack after reducing to graphene. Lignin was used for the same purpose along with the potential for dispersing graphene in aqueous media owing to its amphiphilic nature and the possibility of p–p interaction between graphene. Three samples; chitosan modified graphene/PANI, lignin modified graphene/PANI and graphene/PANI, were prepared and denoted as CS-G/PANI, LG-G/PANI, G/PANI for convenience. The main purpose of this work is to synthesize larger surface area graphene by modification with natural polymers in order to observe and compare the improved capacitance between the samples. The thickness was observed by AFM, morphology was checked by SEM and TEM, the structure was determined by Ramen spectroscopy, the components were studied by FT-IR, the area was measured by BET method and the electrochemical analysis such as Cyclic Voltammetry measurement, EIS, charge-discharge observation have been studied. TEM and SEM images revealed that the PANI nanoparticles were anchored on the surface of chitosan and lignin modified GO sheets. Also, the successful modification of chitosan and lignin has been confirmed by Ramen and FT-IR measurements. At this moment, the work is in progress at the stage of electrochemistry measurement parts and could affirmatively be completed at the end of February. Key words: graphene/polyaniline, biodegradable, chitosan, lignin, hydrazine hydrate in-situ polymerization Acknowledgement This work was supported by National Research Foundation of Korea (grant no.: 2013M2B2A4041305 and 2013R1A2A2A04013913).