Biomass porous carbon materials(TPC)are prepared via a carbonization-activation two-step method using camellia oleifera peel as the precursor,and used as an electrode material for supercapacitor.It is found that both the ratio of carbon to alkali and the temperature during the activation process greatly influence the structure of TPC.The carbon material produced at a carbon/base mass ratio of 1∶3 and an activation temperature of 700℃ has the highest specific surface area(2,453 m2·g-1),the largest pore volume(1.08 cm3·g-1)and abundant edge defects.These properties can increase the active sites within the electrode and promote ion transport,and result in excellent capacitive performance and cycling stability.The mass specific capacitance is 382.1 F·g-1 at a current density of 1 A·g-1.
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