Method for preparing mesoporous carbon material for electrochemical capacitor

The invention provides a method for preparing a mesoporous carbon material for an electrochemical capacitor, and belongs to the technical fields of carbon materials and microwave chemistry. In the method, peanut shells are taken as a carbon source, zinc chloride or phosphoric acid is taken as an activating agent, and the mesoporous carbon material is prepared by one step of activating the peanut shells through microwave-assisted heating; and the obtained mesoporous carbon material has the specific surface area of between 1,307 and 1,552m /g, the total pore volume of between 0.67 and 1.83cm /g, and the average pore size of between 2.06 and 5.02nm; non-micropore volume is 62.7 to 99.2 percent of the total pore volume; and the yield is 32.3 to 44.9 percent. The carbon source is a renewable agricultural waste, and has the characteristics of low price and high availability; the microwave heating has the advantages of uniformity, quickness and energy conservation; and the obtained mesoporous carbon serves as a mate