Potassium gluconate-assisted synthesis of biomass derived porous carbon for high-performance supercapacitor

Abstract Porous carbon has attracted enormous attentions as electrode materials for supercapacitor due to its sufficient porosity and large specific surface area. In this paper, we reported a convenient approach for the preparation of activated porous carbon (APC) by one-step activation method using...
Ausführliche Beschreibung

Abstract Porous carbon has attracted enormous attentions as electrode materials for supercapacitor due to its sufficient porosity and large specific surface area. In this paper, we reported a convenient approach for the preparation of activated porous carbon (APC) by one-step activation method using bacterial cellulose as carbon source and potassium gluconate as activator. The obtained porous carbon possesses a unique porous framework with suitable specific surface area and rich oxygen content. Benefiting from the unique structure, the obtained electrode shows a high specific capacitance of 437 F $ g^{−1} $ at 0.5 A $ g^{−1} $ and excellent electrochemical stability. More interestingly, the constructed APC-700//APC-700 symmetrical supercapacitor exhibits a high energy density of 23.5 Wh $ kg^{−1} $ and good cycling stability in 1 M $ Na_{2} %$ SO_{4} $ aqueous electrolyte. Therefore, the work provides a new and facile method to prepare porous carbon-based electrode materials from biomass for supercapacitor. Ausführliche Beschreibung