Synthesis of nitrogen-doped porous carbon from zeolitic imidazolate framework-67 and phenolic resin for high performance supercapacitors. Issue 8 (1st June 2017)

• Record Type: Journal Article
• Authors: Lei, Yao; Gan, Mengyu; Ma, Li; Jin, Meng; Zhang, Xiuling; Fu, Gang; Yang, Peishu; Yan, Maofa
• Is Part Of: Ceramics international. Volume 43:Issue 8(2017)
• Page Start: 6502
• Page End: 6510
• Publication Date: 2017-06-01
• Subjects: One-pot -- Zeolitic imidazolate framework-67 -- Carbon material -- Supercapacitor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.02.072
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: An one-pot method has been developed to synthesize a new type of composite material, which can be used as carbon source to produce electrode material for supercapacitors. Specifically, zeolitic imidazolate framework-67 (ZIF-67) crystal was synthesized firstly in 2-methylimidazol aqueous solution, then silica primary particles (from hydrolysis of tetraethylorthosilicate) and phenolic resin (from aggregation of resorcinol and formaldehyde) co-condensed on the surface of ZIF-67 crystal in the same system. The key to realize one-pot method is that 2-methylimidazol aqueous solution shows alkalescence, which can catalyze the hydrolysis of tetraethylorthosilicate and the aggregation of phenolic resin. After carbonization and remove of silica, the N-doped porous carbon (Carbon-ZSR) with high degree of graphitization, wide pore size distribution and maximum specific surface area was obtained. When it is used for supercapacitors as the electrode material, the Carbon-ZSR shows excellent electrochemical properties, large specific capacitance (305 Fg −1 at 1 Ag −1 ), high rate performance (229 Fg −1 keeps at 10 Ag −1 ) and excellent electrochemical stability (the specific capacitance maintains 98.4% after 5000 cycles at 10 Ag −1 ), which suggest that the ZIF-derived nitrogen-doped porous carbon is an outstanding electrode material for energy storage devices.