PANI/Au/Fe3O4 nanocomposite materials for high performance energy storage

Ballarin, Barbara; Boanini, Elisa; Montalto, Luigi; Mengucci, P.; Nanni, Daniele; Parise, Chiara; Ragazzini, Ilaria; Rinaldi, D.; Sangiorgi, Nicola; Sanson, Alessandra; Cassani, Maria Cristina

doi:10.1016/j.electacta.2019.134707

Cited by 24 publications

(10 citation statements)

References 37 publications

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“…Spectra obtained in the EIS assay for the CER coated metal sample indicate that there is possibly a barrier effect, even flawed, which provides greater electrical and/or ionic resistance than the uncoated sample. For the coated Pt with IP of CER (Figure 12a,b), an EIS assay showed an EOCP value of +0.49 VAg/AgCl for a 0.25 h exposure period in 2 mol L −1 H2SO4 solution, and produced a spectrum with three distinct frequency regions: the first, (1) at high frequency, is represented by a value resistance arc on the order of 1.2 × 10 5 Ω cm 2 ; a second region in medium frequencies ( 2) is indicated in the spectrum as an elevation of inclination line close to 45°; and a third at low frequencies (3) presents a straight line to the end of the analysis [8,22,23]. These results indicate that the samples have a higher resistance than the uncoated sample after 24 h exposure in 2 mol L −1 H 2 SO 4 solution.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…For the coated Pt with IP of CER (Figure 12a,b), an EIS assay showed an E OCP value of +0.49 V Ag/AgCl for a 0.25 h exposure period in 2 mol L −1 H 2 SO 4 solution, and produced a spectrum with three distinct frequency regions: the first, (1) at high frequency, is represented by a value resistance arc on the order of 1.2 × 10 5 Ω cm 2 ; a second region in medium frequencies (2) is indicated in the spectrum as an elevation of inclination line close to 45 • ; and a third at low frequencies (3) presents a straight line to the end of the analysis [8,22,23].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…R e represents the resistive behavior for the transport of electrons from the metal to the IP and C d generated at the IP border and the electrolyte medium. The IP/metal subsystem represents a constant phase element in which the behavior of IP as C d is conditioned on the transport of electrons from the metal to the coating [23][24][25]. are two simultaneous subsystems in which one Ri represents the charge transfer and/or anions of the electrolyte to the IP and W the diffusional process of HSO4 − ions, increasing the capacitive resistance of the system.…”

Section: Equivalent Circuit Electrolyte/ip/metal Systemmentioning

confidence: 99%

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Passivation of Carbon Steel Using Intelligent Epoxy Paint

Silva

Meneguzzi

2020

Coatings

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This paper presents the production of an epoxy paint associated with a determined concentration of PAni emeraldine base binder, in order to increase dispersion of PAni polymer chains in the paint allow physical contact between PAni chains, the electrolytic medium, and the metal of interest. The coating called Intelligent Epoxy Paint (IEP) seeks to potentialize the electrolytic capacity of PAni to produce passivation, differentiated research which uses PAni in oxidized and conductive form as paint pigment that needs high PAni concentrations. The physicochemical characterization and morphological presented results that indicate the preservation of the desirable properties of PAni in order to make the passivation process possible. The electrochemical tests showed the passivation and/or maintenance of the passivation of the metal of interest, without the need to apply an external current.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Equivalent Circuit Electrolyte/ip/metal Systemmentioning

confidence: 99%

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Passivation of Carbon Steel Using Intelligent Epoxy Paint

Silva

Meneguzzi

2020

Coatings

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“…In pseudocapacitors (PCs), the pseudocapacitance arises from superficial faradic reaction occurring at the electrode/electrolyte interfaces and possesses a much higher specific capacitance (Hu et al, 2015). Transition metal compounds (oxides/hydroxides/nitrides/sulfides) and electronically conducting polymers are extensively researched active materials for usage in PCs (Ballarin et al, 2019). The electrode materials in batteries store faradic charge but are non-capacitive in nature, which results in peak-shaped cyclic voltammetry (CV) and a non-linear galvanostatic chargedischarge (GCD) curve (Yu and Chen, 2016).…”

Section: Introductionmentioning

confidence: 99%

Ce-Doped PANI/Fe3O4 Nanocomposites: Electrode Materials for Supercapattery

et al. 2021

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In this study, we report on a combined approach to preparing an active electrode material for supercapattery application by making nanocomposites of Polyaniline/Cerium (PANI/Ce) with different weight percentages of magnetite (Fe3O4). Fourier-transform infrared spectroscopy (FTIR) and x-ray diffraction (XRD) analyses supported the interaction of PANI with Ce and the formation of the successful nanocomposite with magnetite nanoparticles. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses showed the uniform and porous morphology of the composites. Cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) were used to test the supercapattery behavior of the nanocomposite electrodes in 1.0 M H2SO4. It was found that the supercapattery electrode of PANI/Ce+7 wt.% Fe3O4 exhibited a specific capacity of 171 mAhg−1 in the potential range of −0.2 to 1.0 V at the current density of 2.5 Ag−1. Moreover, PANI/Ce+7 wt.% Fe3O4 revealed a power density of 376.6 Wkg−1 along with a maximum energy density of 25.4 Whkg−1 at 2.5 Ag−1. Further, the cyclic stability of PANI/Ce+7 wt.% Fe3O4 was found to be 96.0% after 5,000 cycles. The obtained results suggested that the PANI/Ce+Fe3O4 nanocomposite could be a promising electrode material candidate for high-performance supercapattery applications.

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“…In recent years, concerted efforts have been made to develop magnetite (Fe 3 O 4 ) nanocomposite materials with improved surface properties suitable for specific applications in diverse fields. As nontoxic, biocompatible, and superparamagnetic materials of relatively high chemical stability, Fe 3 O 4 nanocomposites find applications in biotherapy and biomedicine [ 1 , 2 ], drug targeting and delivery [ 3 , 4 ], catalysis [ 5 , 6 , 7 ], energy storage and release [ 8 , 9 ], environmental remediation [ 10 ], ultrafiltration membrane separation [ 11 ] and microwave absorption [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

Sani

Adnan

et al. 2021

Nanomaterials

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The influence of variable reaction time (tr) on surface/textural properties (surface area, total pore volume, and pore diameter) of carbon-encapsulated magnetite (Fe3O4@C) nanocomposites fabricated by a hydrothermal process at 190 °C for 3, 4, and 5 h was studied. The properties were calculated using the Brunauer–Emmett–Teller (BET) isotherms data. The nanocomposites were characterised using Fourier transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetry, and scanning and transmission electron microscopies. Analysis of variance shows tr has the largest effect on pore volume (F value = 1117.6, p value < 0.0001), followed by the surface area (F value = 54.8, p value < 0.0001) and pore diameter (F value = 10.4, p value < 0.001) with R2-adjusted values of 99.5%, 88.5% and 63.1%, respectively. Tukey and Fisher tests confirmed tr rise to have caused increased variations in mean particle sizes (11–91 nm), crystallite sizes (5–21 nm), pore diameters (9–16 nm), pore volume (0.017–0.089 cm3 g−1) and surface area (7.6–22.4 m2 g−1) of the nanocomposites with individual and simultaneous confidence limits of 97.9 and 84.4 (p-adj < 0.05). The nanocomposites’ retained Fe–O vibrations at octahedral (436 cm−1) and tetrahedral (570 cm−1) cubic ferrite sites, modest thermal stability (37–60% weight loss), and large volume-specific surface area with potential for catalytic application in advanced oxidation processes.

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PANI/Au/Fe3O4 nanocomposite materials for high performance energy storage

Cited by 24 publications

References 37 publications

Passivation of Carbon Steel Using Intelligent Epoxy Paint

Passivation of Carbon Steel Using Intelligent Epoxy Paint

Ce-Doped PANI/Fe3O4 Nanocomposites: Electrode Materials for Supercapattery

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

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