Ionothermally synthesized hierarchical porous Schiff-base-type polymeric networks with ultrahigh specific surface area for supercapacitors

Zhao, Yuhang; Liu, Ping; Zhuang, Xiaodong; Wu, Dongqing; Zhang, Fan; Su, Yuezeng

doi:10.1039/c7ra01203a

Cited by 6 publications

(2 citation statements)

References 39 publications

(29 reference statements)

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“…Figure 6(d) shows the Ragone plot calculated through the GCD data at varying current densities: the energy density of the as-prepared supercapacitor decreases from 7.64 to 4.86 Wh kg −1 , while the power density increases from 0.25 to 5 kW kg −1 . This result implies that the energy density of our HPCN-3 based semi-solid-state symmetrical supercapacitor is below the medium level of the reported supercapacitor devices with doped carbon materials as the electrodes and PVA/H 2 SO 4 gel as the electrolyte [64][65][66][67]. Notably, one supercapacitor device can light up a small LED bulb (the inset picture in figure 6(d)).…”

Section: Electrochemical Performance Of Semi-solid-state Symmetrical ...mentioning

confidence: 71%

Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors

Liu¹,

Li²,

Lu³

et al. 2021

Nanotechnology

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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 m2 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 H2SO4 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.

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Section: Electrochemical Performance Of Semi-solid-state Symmetrical ...mentioning

confidence: 71%

Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors

Liu¹,

Li²,

Lu³

et al. 2021

Nanotechnology

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“…8 In addition, the characteristic peaks of C=N bonds in L and M-L can be found at 1624 and 1209 cm −1 . 43,44 Meanwhile, a new small absorption peak was found at Al-L, Cr-L and Zn-L at 593 cm −1 , 588 cm −1 and 437 cm −1 , respectively. This can be attributed to the stretching vibration of M-N, which is another evidence of coordination bond formation between L and metal ions.…”

Section: Resultsmentioning

confidence: 96%

Facile Synthesis of Polymeric Schiff Base Metal Complex as Electrode for High-performance Supercapacitors

Ma¹,

Li²,

Zhang³

et al. 2020

J. Electrochem. Soc.

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This research presents a simple method for preparing poly Schiff base ligand (L) and its metal complex (M–L, M = Al3+, Cr3+, Zn2+) as electrode materials for supercapacitors, which is derived from mixing terephthalaldehyde, m-phenylenediamine and metal nitrate in ethanol at room temperature. Compared with L, M–L combine the advantages of larger surface area, appropriate mesopore diameter, unique morphology and suitable conductivity. The electrochemical properties of the materials are assessed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) analysis in 6 M KOH electrolyte. The results show that the electrochemical performance of M–L significantly improve compared with L, especially when the current density is 0.5 A g−1, Al–L displays a superior specific capacitance of 608.6 F g−1. Moreover, the specific capacitance of Al–L still reaches 299.1 F g−1 after 1000 GCD cycles at 10 A g−1, which is higher than the initial capacitance of Cr–L and Zn–L. Moreover, the electrochemical resistance of Al–L is smaller than that of others. Therefore, Al–L will become an attractive material in supercapacitors, and opens the door for further research on various poly Schiff base metal complexes (poly[M(Schiff)]) as electrode materials for supercapacitors.

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DFT and experimental study on the spectral and nonlinear optical properties of a highly conjugated imine

Sokhanvaran

Rezaei‐Seresht

Koushki

et al. 2023

Journal of Molecular Liquids

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Ionothermally synthesized hierarchical porous Schiff-base-type polymeric networks with ultrahigh specific surface area for supercapacitors

Abstract: A hierarchical porous polymeric network (HPPN) with ultrahigh specific surface area up to 2870 m2 g−1 was synthesized via a one-step ionothermal synthesis method without using templates.

Cited by 6 publications

References 39 publications

Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors

Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors

Facile Synthesis of Polymeric Schiff Base Metal Complex as Electrode for High-performance Supercapacitors

DFT and experimental study on the spectral and nonlinear optical properties of a highly conjugated imine

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