Aminal/Schiff-Base Polymer to Fabricate Nitrogen-Doped Porous Carbon Nanospheres for High-Performance Supercapacitors

Li, Fei, Huang, Xinhua, Wang, Nuoya, Zhu, Xingxing, Chan, Vincent, Zhao, Ruikun and Chao, Yimin (2020) Aminal/Schiff-Base Polymer to Fabricate Nitrogen-Doped Porous Carbon Nanospheres for High-Performance Supercapacitors. ChemElectroChem, 7 (18). pp. 3859-3865. ISSN 2196-0216

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Abstract

In this study, a polymer-containing aminal and imine (C=N) linkages was synthesized from the reaction between p-phthalaldehyde and 2,6-diaminepyridine through nucleophilic addition. Subsequently, nitrogen-doped carbon nanospheres (N-CNSs) were fabricated by a process of sequential potassium hydroxide (KOH) activation and direct carbonization of the polymer. Interestingly, the mass ratio (x) of the polymer to KOH was found to play a crucial role in dictating the porosity, surface chemistry, and capacitive performance of the resulting CNSs. The optimization of x led to the formation of N-CNS-2 with a significantly larger specific surface area (809 m 2 g −1, 98 % microporous content) and a high specific capacitance (732 F g −1) at 8 A g −1 in 6 M KOH aqueous electrolyte. In addition, the electrode fabricated with N-CNS-2 showed excellent cycling stability along with 98 % of the initial specific capacitance after 5000 charge/discharge cycles. The carbon precursor with the aminal linkage network has shown very promising potential in energy storage materials.

Item Type: Article
Uncontrolled Keywords: activation,aminal bonding,nanosphere,porous carbon,supercapacitors,catalysis,electrochemistry ,/dk/atira/pure/subjectarea/asjc/1500/1503
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 16 Sep 2020 23:57
Last Modified: 19 Oct 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/76903
DOI: 10.1002/celc.202001165

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