Aminal/Schiff-Base Polymer to N-doped Porous Carbon Nanospheres for High-Performance Supercapacitor

Li, Fei, Huang, Xinhua, Wang, Nuoya, Zhu, Xingxing, Chan, Vincent, Zhao, Ruikun and Chao, Yimin (2020) Aminal/Schiff-Base Polymer to N-doped Porous Carbon Nanospheres for High-Performance Supercapacitor. ChemElectroChem. ISSN 2196-0216 (In Press)

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: In this study, the 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-CNS) were fabricated by a process of sequential potassium hydroxide (KOH) activation and direct carbonization of the polymer. Interestingly, mass ratio (x) of polymer to KOH was found to play a crucial role in dictating the porosity, surface chemistry and capacitive performance of the resulted carbon nanoparticles. The optimization of x led to the formation of N-CNS-2 with significantly larger specific surface area (809 m2 g-1, 98% microporous content) and highest 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 an excellent cycling stability along with 98% of the initial specific capacitance after 5000 charge/discharge cycles. The carbon precursor with aminal linkages network has shown very promising potential in the energy storage materials.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: LivePure Connector
Date Deposited: 16 Sep 2020 23:57
Last Modified: 16 Sep 2020 23:57

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