Facile Fabrication of 3D Hierarchically Porous Carbon Foam as Supercapacitor Electrode Material

Abstract

A hierarchically porous 3D starch-derived carbon foam (SCF) with a high specific surface area (up to 1693 m 2 ·g −1 ) was first prepared by a facile solvothermal treatment, in which Na 2 CO 3 is used as both the template and activating agent. The hierarchically porous structure and high specific area endow the SCF with favorable electrochemical properties such as a high specific capacitance of 179.6 F·g −1 at 0.5 A·g −1 and a great rate capability and cycling stability, which suggest that the material can be a promising candidate for energy storage applications.