Transition metal sulfide and graphene composite material counter electrode and preparation and application thereof
A technology of transition metals and composite materials, applied in transition metal sulfide and graphene composite counter electrode and its preparation and application, can solve the problems of limiting surface redox conversion reaction efficiency and unsatisfactory electrical conductivity, and achieve good electrical conductivity and catalytic ability, low cost and simple synthesis technique
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[0024] Example 1: Preparation of cadmium sulfide graphene composite counter electrode
[0025] 1) Synthesis of cadmium sulfide graphene composite: 5mmol of cadmium chloride, 72mg of graphene oxide (prepared by GO, Hummer method), add to 40mL of ethylenediamine solvent, mix and ultrasonic (150W, 40Hz) treatment for 40min, make the reactant Disperse and mix uniformly, and then add 5mmolNa dissolved in 10mL ethylenediamine solvent to the reactant 2 S, stir thoroughly to obtain a suspension of reactants. The reactant mixture was transferred to an autoclave lined with polytetrafluoroethylene, heated to 120°C under airtight conditions, and cooled to room temperature after 12 hours of reaction. The collected products were washed with water and absolute ethanol and dried at 60°C for 10 hours before use.
[0026] 2) Take 0.05g of cadmium sulfide graphene composite powder, add 2.5ml of ethanol solution containing 0.0125g of binder polydiethanol (PEG20000), grind it evenly with a mortar, and...
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