Method for preparing conductive polyaniline nano-rod by using malic acid as template and dopant

The invention discloses a method for preparing a conductive polyaniline nano-rod by using malic acid as a template and a dopant.The method comprises the following steps: dispersing aniline in an aqueous solution containing the malic acid at different ratios, and fully stirring under the condition of ice water bath to obtain an even mixed solution; then dropwise adding ammonium persulfate as an oxidation initiator, initiating polymerization of aniline, and reacting for 12 hours under the condition of stirring; adding 2 mL of 1M hydrochloric acid solution in the solution so that polyaniline is fully doped; washing and carrying out suction filtration with deionized water until filtrate is neutral; and finally, drying at the temperature of 50 DEG C, and grinding and collecting to obtain the conductive polyaniline nano-rod.A preparation process of the invention is simple, environmentally friendly and reliable, sources of raw materials are extensive, cost is low, the method is suitable for industrial production, and compared with massive polyaniline, the obtained conductive polyaniline with the nano-rod-shaped structure has lower resistance and higher specific capacitance.