▎ 摘　　要

NOVELTY - Preparing poly(3,4-ethylenedioxythiophene)-coated graphene oxide, comprises e.g. (i) adding 80-120 mg graphene oxide into 80-120 ml deionized water, then performing ultrasonic treatment for 30-60 minutes to obtain graphene oxide dispersion, adding 20-60 mg Congo red into graphene oxide dispersion to obtain Congo red-loaded graphene oxide dispersion, adding 60-160 mg 3,4-ethylenedioxythiophene into the Congo-red loaded graphene oxide dispersion, sonicating to obtain mixed solution of 3,4-ethylenedioxythiophene and Congo red-loaded graphene oxide, and (ii) adding 0.5-3 ml ferric trichloride hydrochloric acid solution into the above mixed solution, performing chemical oxidative polymerization, pouring the mixed solution into 200-400 ml methanol, magnetically stirring, filtering, washing, and drying. USE - The poly(3,4-ethylenedioxythiophene)-coated graphene oxide is useful in preparing electrodes for supercapacitors (claimed). ADVANTAGE - The graphene oxide: has uniform coating, high specific capacitance, excellent cycle stability, and simple preparation process, which utilizes easily available raw material sources. DETAILED DESCRIPTION - Preparing poly(3,4-ethylenedioxythiophene)-coated graphene oxide comprises (i) adding 80-120 mg graphene oxide into 80-120 ml deionized water at room temperature and magnetically stirring for 30-60 minutes, and then performing ultrasonic treatment for 30-60 minutes to obtain graphene oxide dispersion, adding 20-60 mg Congo red into the graphene oxide dispersion, magnetically stirring for 60-120 minutes at room temperature to obtain Congo red-loaded graphene oxide dispersion, adding 60-160 mg 3,4-ethylenedioxythiophene into the Congo red-loaded graphene oxide dispersion, magnetically stirring at room temperature for 30-60 minutes, then sonicating for 30-90 minutes, and then magnetically stirring for 10-30 minutes to obtain mixed solution of 3,4-ethylenedioxythiophene and Congo red-loaded graphene oxide, and (ii) adding 0.5-3 ml ferric trichloride hydrochloric acid solution into the above mixed solution at rate of 10-20 drops/minute, magnetically stirring at 5-20 degrees C for 24-48 hours, performing chemical oxidative polymerization, pouring the obtained mixed solution into 200-400 ml methanol, magnetically stirring at room temperature for 10-30 minutes, allowing to stand for 12-36 hours, filtering, washing with methanol and deionized water, and drying in vacuum at 60 degrees C for 24 hours to obtain final product.