Rapid preparation method of manganese oxide/carbon sphere composite material for three-dimensional (3D) printing

The invention relates to a rapid preparation method of a manganese oxide/carbon sphere composite material for three-dimensional (3D) printing. Aiming at the problems of small electrode capacity and low specific capacitance of a capacitor, the manganese oxide/carbon sphere composite material is prepared according to the steps of taking a carbon sphere as a carbon source and potassium permanganate as a manganese doping agent, preparing a solution, carrying out ultrasonic dispersing processing, synthesizing a manganese oxide/carbon sphere, carrying out washing, suction filtering and vacuum drying, and carrying out heating and sintering with vacuum microwave. The preparation method is advanced and rapid in process and accurate and full in data, a product is black powder, the particle diameter of the powder is less than or equal to 200 nanometers, the product purity reaches 99.3%, the specific capacitance index is 114F/g, the preparation method is an advanced method for rapid preparation of the manganese oxide/carbon sphere composite material, and the material can be used for a 3D printing technology.