Structural evolution of porous graphitic carbon nanosheets based on quinonyl decomposition for supercapacitor electrodes

Porous graphitic carbon nanosheets (MNC-x) with well-developed porosity and appropriate heteroatom doping are prepared by directly carbonizing sodium lignosulfonate in inert atmosphere. Interestingly, MNC-900 prepared at 900 °C shows sharp increases in specific surface area, carbon to oxygen atom ratio, graphitization degree and electrical conductivity compared with MNC-800 prepared at 800 °C, which are mainly attributed to the quinonyl...