▎ 摘　　要

NOVELTY - A graphene-nano nickel composite thermoelectric thin film is prepared by adding solution (A) into a container, immersing pre-treated copper plate as negative electrode and iron sheet as positive electrode and reacting. The solution (A) is prepared by mixing surface-treated graphite oxide and polymer mixture, heating, adding solution containing tetravalent cerium ions, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and ethylene glycol, mixing, adding ethylene glycol solution of nickel chloride, polyvinylpyrrolidone and ammonium acetate and reacting. USE - Graphene-nano nickel composite thermoelectric thin film (claimed). ADVANTAGE - The graphene-nano nickel composite thermoelectric thin film has excellent electroconductivity. DETAILED DESCRIPTION - A graphene-nano nickel composite thermoelectric thin film is prepared by adding solution (A) into a container, immersing pre-treated copper plate base material as negative electrode and iron sheet as positive electrode and reacting at 30-120 V for 30-90 minutes. The solution (A) is prepared by mixing surface-treated graphite oxide and polymer mixture in mass ratio 1-2:1-3, heating to 80-95 degrees C under nitrogen atmosphere, adding solution containing tetravalent cerium ions, stirring for 2-4 hours, filtering, washing, drying, adding 1-10 g polyethylene oxide-polypropylene oxide- polyethylene oxide triblock copolymer and 500 ml ethylene glycol, mixing, adding 20-40 ml ethylene glycol solution of nickel chloride, 6-25 g polyvinylpyrrolidone and 10-50 g ammonium acetate, and 500-1000 mL ethylene glycol, mixing uniformly, adjusting pH value to 9-11 using aqueous ammonia, adding 100 ml clear solution into a reactor, sealing the reactor, heating, reacting, cooling the resultant reaction mixture to room temperature at 3-6 degrees C/minute, centrifuging for 10 minutes and 8000-10000 rpm, washing with ethanol and deionized water for three times, drying at 50-70 degrees C for 24 hours under vacuum, adding 5 g resultant product and 5-10 g aniline monomer into solution of dodecylbenzenesulfonic acid, dispersing for 65 minutes, adding solution of 3 g ammonium persulfate and 80-120 ml distilled water, reacting, washing the resultant reaction mixture with ethanol and drying at 50-70 degrees C for 24-36 hours under vacuum, obtaining wave-absorbing material, adding wave-absorbing material into deionized water, mechanically stirring for 10-15 minutes, obtaining uniform solution. The surface-treated graphite oxide is prepared by adding expanded graphite into an incubator, heating to 40 degrees C, reacting for 3 hours, adding distilled water, reacting at 40 degrees C for 2.5 hours, adding distilled water and hydrogen peroxide, reacting at 8000-10000 rpm for 10-60 minutes, washing the resultant product with hydrochloric acid solution, centrifuging, dialyzing for 7-8 days, adding dimethylsulfoxide and N-hydroxysuccinimide and surface-treating agent, stirring at 35 degrees C for 2 hours, performing suction filtration process, washing and drying. The expanded graphite is obtained by adding 50-200-mesh graphite powder into 35 %mass hydrochloric acid solution, stirring for 30 minutes, repeatedly washing with deionized water, drying, adding potassium persulfate and phosphorus pentoxide, mixing uniformly, adding concentrated sulfuric acid, adjusting pH value to 1.5, stirring the resultant mixture at 60 degrees C for 1-2 hours, then stirring at 80 degrees C and 5 degrees C/minute for 2-4 hours, heating at 87 degrees C and 2 degrees C/minute for 1-2 hours, diluting using distilled water, adjusting pH to 3.6, filtering, maintaining for 36 hours, maintaining pH value to 6-7, drying at room temperature, adding concentrated nitric acid, stirring for 45-60 minutes, adjusting pH value to 2-4, stirring for 30 minutes, cooling to -12 degrees C, adding potassium permanganate, stirring for 30 minutes, cooling to -15 degrees C, filtering, drying and heat treating in a muffle furnace at 1100 degrees C for 10-20 seconds, at 1150 degrees C for 20-30 seconds and at 1180 degrees C for 15-20 seconds. The pre-treatment of copper plate involves ultrasonically cleaning copper plate with acetone, deionized water, methanol and deionized water for 5-10 minutes and drying in vacuum at 90-120 degrees C for 10-30 minutes.