Synthesis of microporous carbon nanofibers with high specific surface using tetraethyl orthosilicate template for supercapacitors. (15th June 2016)

• Record Type: Journal Article
• Authors: Sheng, Jie; Ma, Chang; Ma, Yuan; Zhang, Haixia; Wang, Ranran; Xie, Zhenyu; Shi, Jingli
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 22(2016)
• Page Start: 9383
• Page End: 9393
• Publication Date: 2016-06-15
• Subjects: Microporous carbon nanofibers -- Tetraethyl orthosilicate -- Template method -- Supercapacitors -- Electrospinning; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.04.076
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Microporous carbon nanofibers (CNFs) with a high specific surface area were prepared by sol–gel, electrospun, carbonization and pickling processes. Resol type phenolic resin (PF) acted as carbon source, tetraethyl orthosilicate (TEOS) worked as template and polyvinyl-pyrrolidone worked as spinning additives. The specific surface area and total pore volume of the CNFs were increased obviously with the increased amount of TEOS. A high specific area of 2164 m 2 g −1, high microporosity and relatively narrow pore size distribution were achieved. The electrochemical performance was evaluated in 6 M KOH aqueous solution. The microporous CNFs exhibited outstanding electrochemical performance as binder-free electrode of supercapacitors, including a high specific capacitance (316 F g −1 at 0.2 A g −1 ), considerable rate performance (210 F g −1 at 20 A g −1 ) and good cycle stability (95% after cycling 1000 times). The microporous CNFs were promising electrode materials for high-performanced supercapacitors. Highlights: Electrospun carbon nanofibers are obtained with phenolic resin as precursor and TEOS as template. Carbon nanofibers have high microporosity of 88% and surface area of 2164 m 2 g −1 . The high-surface-area carbon nanofibers can be directly made into electrode free of binder. A high capacitance of 316 F g −1 and good cycling stability are achieved.