Nanoarchitectonics of hierarchical porous carbon derived from starch for high-performance supercapacitors

Abstract

Three-dimensional hierarchical porous carbons were prepared from starch employing a simple template-assisted approach. Adjusting the amount of Ni(CH₃COO)₂·4H₂O and NaCl can control the specific surface area, porous structure and graphitization degree of the carbon materials, which have an impact on the electrochemical performance of the materials using as electrode materials for supercapacitors. The carbon materials present a specific capacitance of 267.3 F⋅g⁻¹ at a current density of 2 A⋅g⁻¹. The described approach represents an innovative and potentially feasible solution for future large-scale production of porous carbon electrodes with excellent electrochemical performance for high-performance supercapacitors.