ASPHALT-BASED HOLLOW ACTIVATED CARBON MICROSPHERE AND METHOD FOR PREPARING SAME, ELECTRODE SHEET, AND SUPERCAPACITOR

The present invention relates to the technical field of electrochemical energy storage material preparation, and discloses an asphalt-based hollow activated carbon microsphere and a method for preparing same, an electrode sheet, and a supercapacitor. The method comprises the following steps: (1) mixing an asphalt of a low ash content with a solvent to give a mixed asphalt solution; (2) subjecting the mixed asphalt solution to spray pyrolysis in an inert atmosphere to give a hollow carbon microsphere; (3) mixing the hollow carbon microsphere with an activating agent for activating to give activated carbon; and (4) pickling and washing the activated carbon to remove impurities, and drying to give the hollow activated carbon microsphere. The method features simple procedures, cost-efficiency, a continuous manufacturing process, and the like. The asphalt-based hollow activated carbon microsphere prepared by the method disclosed herein has a high specific surface area, robust performance, and apparent hollow struc