Research progress on nitrogen doping modification of biomass activated carbon materials for supercapacitors

Supercapacitors have attracted much attention in the field of energy storage due to their high specific capacitance, stable cycle efficiency, and efficient charging and discharging capabilities. The selection of electrode materials can affect the overall performance of supercapacitors. Biomass, as a new type of raw material, is widely used as a precursor for carbon in supercapacitors due to its abundant sources, unique physical structure, and low manufacturing costs. This not only increases the utilization value of biomass, but also reduces the use of non renewable resources. However, biomass derived carbon materials themselves have limited specific surface area, irregular and underdeveloped pore structure, and relatively fragile spatial structure. Nitrogen doping is a common modification method for biomass carbon materials. This article takes various biomass derived carbon materials as research objects, using potassium hydroxide as an activator and nitrogen atom doping method for modification, to prepare supercapacitor electrode materials with unique physical morphology and excellent electrochemical performance.