Polybenzoxazine originated N-doped mesoporous carbon ropes as an electrode material for high-performance supercapacitors

Periyasamy, Thirukumaran; Atchudan, Raji; Asrafali, Shakila Parveen; Lee, Yong Rok; Kim, Seong Cheol

doi:10.1016/j.jallcom.2018.04.034

Cited by 53 publications

(23 citation statements)

References 44 publications

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“…For uncured BA-a/Fe(acac) 3 system, the O1s peak was located at 532.8 eV corresponding to the C–O–C bond in the oxazine ring. 33 After curing for 2 h, there was only the peak at 534.6 eV (O–C) due to complete opening of oxazine ring. After curing for 6 h, the O1s peak had changed from 534.6 eV (O–C) to 532.4 eV (–OH), indicating that the rearrangement reaction was completed after curing for 6 h.…”

Section: Resultsmentioning

confidence: 98%

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

Yan

Wang

et al. 2020

High Performance Polymers

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To overcome high water absorption of inorganic metal salts and their poor compatibility with resin, acetylacetone metal salts (M(acac) n) were selected as the catalysts of benzoxazine resin. Their effects on the catalytic activity, structure, and thermal stability of polybenzoxazine had been estimated by dynamic differential scanning calorimetry, in situ Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analyzer. The results revealed that M(acac) n of iron (Fe3+), cobalt (Co3+ and Co2+), and copper (Cu2+) exhibited high catalytic activity and reduced evidently activation energy, especially acetylacetone iron salt. The addition of M(acac) n was beneficial to the formation of Ph–N–Ph structure, which was easy to form a denser carbon layer during thermal degradation, prevented heat transfer and further decomposition of the resin, and finally led to the increase of carbon residue at high temperature.

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Section: Resultsmentioning

confidence: 98%

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

Yan

Wang

et al. 2020

High Performance Polymers

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“…Figure 7 displays the CV curves of the GPNVP composite at different scan rates of 5, 10, 25, 50, 75, 100, 150, 200, 250, 300, 400, and 500 mV/s within the potential range from 0.0 to 0.6 V (vs. Hg/Hg 2 SO 4 ) in an aqueous 1 M H 2 SO 4 electrolyte. The CV loops of the GPNVP composite show a typical rectangular shape of carbon material without obvious oxygen and hydrogen evolution peaks at all scan rates, indicating the ideal electric double-layer capacitive behavior and good charge propagation within the GPNVP electrode [ 63 , 64 , 65 ]. The GPNVP electrode displays the obvious increments in the current with an increase in the scan rates from 5 to 500 mV/s.…”

Section: Resultsmentioning

confidence: 99%

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

et al. 2021

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Heteroatom functionalization on a graphene surface can endow the physical and structural properties of graphene. Here, a one-step in situ polymerization method was used for the noncovalent functionalization of a graphene surface with poly-N-vinyl-2-pyrrolidone (PNVP) and the exfoliation of graphite into graphene sheets. The obtained graphene/poly-N-vinyl pyrrolidone (GPNVP) composite was thoroughly characterized. The surface morphology of GPNVP was observed using field emission scanning electron microscopy and high-resolution transmission electron microscopy. Raman spectroscopy and X-ray diffraction studies were carried out to check for the exfoliation of graphite into graphene sheets. Thermogravimetric analysis was performed to calculate the amount of PNVP on the graphene surface in the GPNVP composite. The successful formation of the GPNVP composite and functionalization of the graphene surface was confirmed by various studies. The cyclic voltammetry measurement at different scan rates (5–500 mV/s) and electrochemical impedance spectroscopy study of the GPNVP composite were performed in the typical three-electrode system. The GPNVP composite has excellent rate capability with the capacitive property. This study demonstrates the one-pot preparation of exfoliation and functionalization of a graphene surface with the heterocyclic polymer PNVP; the resulting GPNVP composite will be an ideal candidate for various electrochemical applications.

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“…In a similar way, activation of carbonized samples was also done at 800 and 900 °C. After activation, the products were repeatedly washed with 1 M HCl and deoinized H 2 O until a neutral pH was obtained [ 33 , 34 , 35 , 36 , 37 ]. They were then dried at 110 °C for 12 h. The dried samples were denoted as NRPC-700, NRPC-800 and NRPC-900 ( Scheme 1 ).…”

Section: Synthesis Of Benzoxazine Monomer and Nrpcsmentioning

confidence: 99%

N-Doped Mesoporous Carbon Prepared from a Polybenzoxazine Precursor for High Performance Supercapacitors

et al. 2021

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Supercapacitors store energy either by ion adsorption or fast surface redox reactions. The capacitance produced by the former is known as electrochemical double layer capacitance and the latter is known as pseudo-capacitance. Carbon materials are found to be attractive materials for energy storage, due to their various micro-structures and wide source of availability. Polybenzoxazine (Pbz) is used as a source to produce carbon materials, due to the fact that the obtained carbon will be rich in N and O species for enhanced performance. Moreover, the carbon materials were produced via template-free method. In general, activation temperature plays a main role in altering the porosity of the carbon materials. The main purpose of this study is to find the suitable activation temperature necessary to produce porous carbons with enhanced performance. Considering these points, Pbz is used as a precursor to produce nitrogen-doped porous carbons (NRPCs) without using any template. Three different activation temperatures, namely 700, 800 and 900 °C, are chosen to prepare activated porous carbons; NRPC-700, NRPC-800 and NRPC-900. Hierarchical micro-/ meso-/macropores were developed in the porous carbons with respect to different activation temperatures. PBz source is used to produce carbons containing heteroatoms and an activation process is used to produce carbons with desirable pore structures. The surface morphology, pore structure and binding of heteroatoms to the carbon surface were analyzed in detail. NRPCs produced in this way can be used as supercapacitors. Further, electrodes were developed using these NRPCs and their electrochemical performance including capacitance, specific capacitance, galvanic charge/discharge, impedance, rate capability are analyzed. The obtained results showed that the activation temperature of 900 °C, is suitable to produce NRPC with a specific capacitance of 245 F g−1 at a current density of 0.5 A g−1, that are attributed to high surface area, suitable pore structure and presence of heteroatoms.

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Polybenzoxazine originated N-doped mesoporous carbon ropes as an electrode material for high-performance supercapacitors

Cited by 53 publications

References 44 publications

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

Effect of acetylacetone metal salts on curing mechanism and thermal stability of polybenzoxazine

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

N-Doped Mesoporous Carbon Prepared from a Polybenzoxazine Precursor for High Performance Supercapacitors

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