In:
Nanotechnology, IOP Publishing, Vol. 32, No. 30 ( 2021-07-23), p. 305602-
Abstract:
Schiff base formation reaction is highly dynamic, and the microstructure of Schiff base polymers is greatly affected by reaction kinetics. Herein, a series of Schiff base cross-linked polymers (SPs) with different morphologies are synthesized through adjusting the species and amount of catalysts. Nitrogen/oxygen co-doped hierarchical porous carbon nanoparticles (HPCNs), with tunable morphology, specific surface area (SSA) and porosity, are obtained after one-step carbonization. The optimal sample (HPCN-3) possesses a coral reef-like microstructure, high SSA up to 1003 m 2 g −1 , and a hierarchical porous structure, exhibiting a remarkable specific capacitance of 359.5 F g −1 (at 0.5 A g −1 ), outstanding rate capability and cycle stability in a 1 M H 2 SO 4 electrolyte. Additionally, the normalized electric double layer capacitance (EDLC) and faradaic capacitance of HPCN-3 are 0.239 F m −2 and 10.24 F g −1 respectively, certifying its superior electrochemical performance deriving from coral reef-like structure, high external surface area and efficient utilization of heteroatoms. The semi-solid-state symmetrical supercapacitor based on HPCN-3 delivers a capacitance of 55 F g −1 at 0.5 A g −1 , good cycle stability of 86.7% after 5000 GCD cycles at 10 A g −1 , and the energy density ranges from 7.64 to 4.86 Wh kg −1 .
Type of Medium:
Online Resource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/abf59d
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
1362365-5
SSG:
11
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