Spongy nitrogen-doped activated carbonaceous hybrid derived from biomass material/graphene oxide for supercapacitor electrodes. Issue 51 (5th May 2015)

• Record Type: Journal Article
• Authors: Gharehkhani, Samira; Seyed Shirazi, Seyed Farid; Pilban Jahromi, Siamak; Sookhakian, Mehran; Baradaran, Saeid; Yarmand, Hooman; Ataollahi Oshkour, Azim; Kazi, Salim Newaz; Basirun, Wan Jefrey
• Is Part Of: RSC advances. Volume 5:Issue 51(2015)
• Page Start: 40505
• Page End: 40513
• Publication Date: 2015-05-05
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra01525a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A nitrogen doped and activated material with spongy-like structure containing a low cost carbon derived from the waste agricultural material and graphene oxide is synthesized via facile thermal treatment for supercapacitor applications. Abstract : Carbon derived from low cost agricultural waste material was used as a precursor for the preparation of a spongy-like nitrogen doped activated composite from carbon/graphene oxide via a one-step thermal treatment. N-doping and activation of the carbon/graphene oxide mixture were achieved simultaneously by the treatment of urea and potassium hydroxide at 800 °C. The nitrogen content and ratio between the nitrogen species was controlled by the mass ratio of KOH : carbon. The composite was prepared with a KOH : carbon ratio of 1 which resulted in a moderate surface area (1712.4 m 2 g −1 ) and a high nitrogen content (14.51%). The hybrid material gave high specific capacitance (267 F g −1 at 5 mV s −1 ) and good cycling stability (92.3% capacitance retention after 5000 cycles) in 6 M KOH electrolyte. Hence, the new composite presented in this work can be used as an advanced material for supercapacitor applications.