Enhanced electrochemical performance and high voltage window for supercapacitor based on multi-heteroatom modified porous carbon materials

Abstract

In order to prepare a high energy density supercapacitor, multi-heteroatom modified porous carbon materials derived from biomass were adopted. The fabricated supercapacitor demonstrated an excellent energy density of 35 W h kg⁻¹ and a high operating voltage window of 1.9 V in neutral Na₂SO₄ solution, exhibiting performance that is among the best of the current carbon materials.