Nitrogen-functionalized microporous carbon nanoparticles for high performance supercapacitor electrode

• Published in: Electrochimica acta Vol. 153; pp. 448 - 455
• Main Authors: Zhao, Yunhui, Liu, Mingxian, Deng, Xiangxiang, Miao, Ling, Tripathi, Pranav K., Ma, Xiaomei, Zhu, Dazhang, Xu, Zijie, Hao, Zhixian, Gan, Lihua
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20.01.2015
• Subjects: Aqueous electrolytes; Capacitance; Carbon; Carbonization; Cycles; Discharge; Electrode; Electrodes; Microporous carbon nanoparticles; Nanoparticles; Nitrogen-functionalization; Supercapacitor; Surface chemistry; Ultrahigh-rate performance; Nitrogen-functionalization; Supercapacitor; Electrode; Microporous carbon nanoparticles; Ultrahigh-rate performance
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2014.11.173

Nitrogen-functionalized microporous carbon nanoparticles (N-MCNs) are prepared by direct carbonization of a novel polymer obtained from the Schiff base reaction of terephthalaldehyde and m-phenylenediamine. The carbonization temperature plays a crucial role in the porosity, surface chemistry and capacitive performance for the carbons. N-MCN850 sample shows a much larger specific surface area of 1938m2g−1, a higher specific capacitance of 397Fg−1 and 145Fg−1 at the current density of 0.1 and 100Ag−1 in 6M KOH aqueous electrolyte, respectively. The results indicate its outstanding capacitive behavior and ultrahigh-rate performance. In addition, the electrode shows excellent cycling stability along with 98% of the initial specific capacitance after 5000 charge/discharge cycles.