Preparation method for growing KCu7S4 microwire arrays on carbon paper

A preparation method for growing KCu7S4 microwire arrays on carbon paper is disclosed. The KCu7S4 microwire arrays are evenly distributed on both surfaces of the carbon paper, and have a diameter of about 1-10 microns and a length of about 50-500 microns. The method mainly includes two steps, namely a step of copper plating on the carbon paper and a step of growing the KCu7S4 microwire arrays through a hydrothermal reaction. The step of copper plating on the carbon paper includes firstly subjecting the carbon paper to roughening, sensitizing and activation, then soaking the carbon paper in a prepared copper plating solution and cleaning and drying the paper to obtain copper plated carbon paper. The step of growing the KCu7S4 microwires includes firstly preparing a solution mixture containing anhydrous ethanol, sulfur powder, and potassium hydroxide in a certain proportion, then transferring the solution mixture to a reaction kettle lined with polytetrafluoroethylene, adding the copperplated carbon paper, seal