High performance carbon supercapacitor electrodes derived from a triazine-based covalent organic polymer with regular porosity

A series of highly microporous carbon materials was produced by carbonization of a triazine-based covalent organic polymer (TCOP) followed by carbonization and CO2 physical activation. The N-containing porous COP was prepared from easily available economic monomer precursors via a simple Friedel-Cra...

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Bibliographic Details
Published in:Electrochimica acta 2018-09, Vol.284, p.98-107
Main Authors: Kim, Minjae, Puthiaraj, Pillaiyar, Qian, Yingjie, Kim, Yeongseon, Jang, Seokhoon, Hwang, Sosan, Na, Eunbeen, Ahn, Wha-Seung, Shim, Sang Eun
Format: Article
Language:English
Subjects:
Activated carbon
Activation
Carbon dioxide
Carbonization
Covalent organic polymer
Electrochemical analysis
Electrodes
Electrolytes
Friedel-Crafts reaction
Microporous carbon
Nitrogen
Nitrogen doped carbon
Polymers
Pore size
Pore size distribution
Porosity
Regular porosity
Supercapacitor
Surface area
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Summary:A series of highly microporous carbon materials was produced by carbonization of a triazine-based covalent organic polymer (TCOP) followed by carbonization and CO2 physical activation. The N-containing porous COP was prepared from easily available economic monomer precursors via a simple Friedel-Crafts reaction, which produced a predominantly microporous structure with a high surface area. Carbonization at 600–900 °C produced predominantly microporous carbons with a narrow pore size distribution in the range of 0.5–1.5 nm. Upon further activation using CO2, more micropores were formed, accompanied by an increase in the surface area (to 2003 m2 g−1) and the nitrogen level in the carbon structure was maintained at ca. 2 wt%. The electrochemical properties of the samples were measured by employing a three-electrode system with 6 M KOH electrolyte. Among the prepared carbon samples, the electrode fabricated using the carbon activated at 900 °C (AC-900) had a specific capacitance of 278 F g−1 at a current density of 1 A g−1, which is significantly higher than that of a commercial activated carbon (130 F g−1) and ranks among the highest reported so far. This improved performance was attributed to the highly microporous structure of the nitrogen-doped carbon with a narrow pore size distribution. [Display omitted]
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2018.07.096