Hierarchically porous carbon materials prepared from tannic acid with potassium citrate <em>via </em>ice-templating followed by carbonization for supercapacitors
발표자
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초록
내용
In this study, hierarchically porous carbon materials (HPCMs) were prepared from tannic acid (TA) an environmentally friendly carbon precursor and potassium citrate (PC) as a harmless agent through ice-templating followed by carbonization without additional activation process. The physicochemical characterization of the HPCMs revealed that the pore properties and morphology were strongly affected by the amount of PC used. The specific surface area and total pore volume of the HPCMs increased with increasing amounts of PC. The HPCM-based electrode showed an excellent supercapacitive performance in a 3-electrode system, such as high specific capacitance and excellent cycling stability. These results suggest that the HPCMs prepared from sustainable TA and a mild PC activation agent via an eco-friendly process can be used as a potential active material for high-performance supercapacitors.