Examination of high porosity activated carbon obtained from dehydration of white sugar for electrochemical capacitor applications

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Authors

Oyedotun, Kabir Oyeniran
Barzegar, Farshad
Mirghni, Abdulmajid Abdallah
Khaleed, Abubakar A.
Masikhwa, T.M. (Tshifhiwa)
Manyala, Ncholu I.

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Publisher

American Chemical Society

Abstract

In this research study, we have presented a simple two-step synthesis path to producing a cost-effective, high-porosity carbon material via acidic dehydration of white sugar. The electrochemical behavior of the activated sugar-based carbon material (ASC), activated at 400 °C (ASC 400) and adopted as a supercapacitor electrode in a symmetric device, demonstrated a limit specific capacitance of 242.67 F g–1 at 1 A g–1. The device also demonstrated a good efficacy as an established material for supercapacitors suitable for high-power applications with a satisfactory energy density of 19 Wh kg–1 and a power density of 750 W kg–1 at a gravimetric specific current of 1 A g–1. The results obtained provide a potential route to converting cheap refined biomass sources into highly porous nanostructured materials for energy-storage device applications.

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Keywords

Carbonization, Supercapacitor (SC), Activated sugar-based carbon material (ASC), H2SO4, Na2SO4, Specific capacitance, Specific surface area, White sugar

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Citation

Oyedotun, K.O., Barzegar, F., Mirghni, A.A. et al. 2019, 'Examination of high porosity activated carbon obtained from dehydration of white sugar for electrochemical capacitor applications', ACS Sustainable Chemistry and Engineering, vol. 7, no. 1, pp. 537-546.