Sustainable waste tofu-derived graphene oxide–doped porous carbon for high-performance supercapacitor

Abstract The redevelopment of waste food is in line with the concept of green environmental protection and recycling of resources. The discarded tofu is used as a porous carbon electrode material prepared by carbon precursor doping with graphene oxide WTPC800 showing excellent specific capacitance reaching 210 F g−1 at a current density of 1 A g−1, and an extremely excellent specific surface area of 2,480 ㎡ g−1 and its capacitance retention rate reach 94.6% after 5,000 cycles.