Challenges and opportunities in the field of energy storage: supercapacitors and activated biochar

Supercapacitors are the most attractive energy storage systems caused their amazing performances. New materials (i.e. graphene, carbon nanotubes, carbon fibers) have been deeply and extensively studied. In the last decade activated biochar has gained a great as material for several applications from solid fuel to electrochemical ones. In this chapter the use of activated biochar as electrodes for supercacitors crafting will reviewed with a particualar enphasis on the activation procedures (physical, chemical) and final properties of the materials (surface area, capacitance values)