| 초록 |
We present a method to produce highly porous graphene-like carbons derived from biomass. This method involves the carbonization of biomass such as glucose under gas blowing, yielding a 3D structured graphene-like carbon network with macro-pores. The biomass-derived graphene-like carbons were then activated with CO2 gas to introduce small nanoscale pores on it, thereby resulting in a hierarchical pore structures. The resulting graphene-like carbons showed a high specific surface area that allows for extensive formation of an electrochemical double layer and a high specific capacitance. It showed significantly improved electrochemical performance in terms of energy density, with an energy density approaching that of conventional lead-acid batteries. Other studies on highly porous biomass-derived graphene in energy storage applications will also be presented, along with current efforts in our group on graphene-based and graphene-derived carbons for electrical energy storage. |
