Article history: A series of porous carbon samples were prepared by combining a semi-carbonization process of acidic Received 23 April 2017 polymerized phenol-formaldehyde resins and a following chemical activation with KOH used in different Received in revised form 6 July 2017 ratios to increase speciﬁc surface area, micropore content and pore sizes of the carbons which is favourable Accepted 14 August 2017 for supercapacitor applications. Samples were characterized by nitrogen physisorption, powder X-ray Available online 24 August 2017 diffraction, Raman spectroscopy and scanning electron microscopy. The results show that the amount of KOH, combined with the semi-carbonization step had a remarkable effect on the speciﬁc surface area Keywords: 2 −1 2 −1 3 −1 (up to S : 3595 m g and S : 2551 m g ), pore volume (0.60–2.62 cm g ) and pore sizes (up BET DFT Phenol-formaldehyde resin to 3.5 nm). The carbons were tested as electrode materials for electrochemical double layer capacitors Supercapacitor (EDLC) in a two electrode setup with tetraethylammonium tetraﬂuoroborate in acetonitrile as electrolyte. Activated carbon The prepared carbon material with the largest surface area, pore volume and pore sizes exhibits a high KOH activation −1 −1 −1 Electrode material speciﬁc capacitance
Applied Surface Science – Elsevier
Published: Jan 1, 2018
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