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

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 hydroxid...

Full description

Saved in:
Bibliographic Details
Published in:ChemElectroChem 2020-09, Vol.7 (18), p.3859-3865
Main Authors: Li, Fei, Huang, Xinhua, Wang, Nuoya, Zhu, Xingxing, Chan, Vincent, Zhao, Ruikun, Chao, Yimin
Format: Article
Language:English
Subjects:
activation
aminal bonding
Aqueous electrolytes
Capacitance
Carbon
Chemical synthesis
Energy storage
nanosphere
Nanospheres
Nitrogen
Optimization
Polymers
Porosity
porous carbon
Potassium hydroxides
supercapacitors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 m2 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. Better together: Coexistence of intramolecular imine (C=N) and aminal bonds in the polymer precursor aids the production of N‐doped porous carbon for high‐performance supercapacitors.
ISSN:2196-0216
2196-0216
DOI:10.1002/celc.202001165