In situ nitrogen-doped mesoporous carbon nanofibers as flexible freestanding electrodes for high-performance supercapacitors. Issue 45 (6th November 2017)

• Record Type: Journal Article
• Authors: Tan, Jian; Han, Yulai; He, Liang; Dong, Yixiao; Xu, Xu; Liu, Dongna; Yan, Haowu; Yu, Qiang; Huang, Congyun; Mai, Liqiang
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 45(2017)
• Page Start: 23620
• Page End: 23627
• Publication Date: 2017-11-06
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta07024a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : In situ N-doped mesoporous carbon nanofibers synthesized by depositing magnesium hydroxide (Mg(OH)2 ) into polyacrylonitrile (PAN) nanofibers and combining carbonization with etching process exhibit excellent supercapacitive performance. Abstract : Herein we propose a low-cost, one-step synthesis of magnesium hydroxide (Mg(OH)2 ) that is deposited on polyacrylonitrile (PAN) nanofibers by electrospinning. Following carbonization and etching, an in situ N-doped mesoporous carbon nanofiber (N-MCNF) network is synthesized. The synthesized flexible network is employed as a freestanding electrode for supercapacitors. The as-constructed supercapacitor based on the N-MCNFs prepared at 900 °C (N-MCNFs-900) can deliver excellent performance with an ultrahigh specific capacitance of 327.3 F g −1 at a current density of 1.0 A g −1, and remarkable cycling stability, e.g., only about 7% loss after 10 000 cycles at a constant high charging–discharging current of 20 A g −1 in 6 M KOH aqueous electrolyte. The flexible network consisting of N-MCNFs-900 as the electrode material with long cycling stability is highly promising for next-generation high-performance supercapacitors.