“…6 The performance of supercapacitors is closely related to the choice of electrode materials, which generally include three categories: metal compounds, conductive polymers and carbon materials, among which carbon materials include activated carbon (ACs), carbon fiber (CFs), carbon aerogels, graphene, carbon nanotubes (CNTs), etc. 7 Carbon materials can be derived from biomass, and are highly valuable and potential electrode materials for supercapacitors, that not only have a rich pore structure and high specific surface area, but also have low preparation costs, diverse sources, convenient preparation procedures, and most importantly, play an important role in protecting the environment. 8 So, the use of biomass energy is in line with the concept of global sustainable scientific development.…”