Facile synthesis of a MnFe<sub>2</sub>O<sub>4</sub>/rGO nanocomposite for an ultra-stable symmetric supercapacitor

Tabrizi, Amin Goljanian; Arsalani, Nasser; Arsalani, Nasser; Namazi, Hassan; Ghadimi, Laleh Saleh; Ahadzadeh, Iraj

doi:10.1039/c6nj04093d

Cited by 119 publications

(19 citation statements)

References 61 publications

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“…As can be seen from Figure 10c, with increasing the power density from 1333 to 5840 W kg −1 , the related energy density decreases from 76 to 48.8 W h kg −1 . These values are higher than those carbon‐based cells reported previously, including VO (OH) 2 /CNT SSC (32.08 W h kg −1 at 63.66 W kg −1 ), [ 70 ] RG/VO 2 //RG ASC (22.8 W h kg −1 at 425 W kg −1 ), [ 71 ] MnFe 2 O 4 /rGO//MnFe 2 O 4 /rGO (15.9 W h kg −1 at 324.5 W kg −1 ), [ 72 ] PANI/SWCNTs//PANI/SWCNTs (19.45 W h kg −1 at 320.5 W kg −1 ), [ 73 ] RGO‐PANi//RGO‐PANi (13.9 W h kg −1 at 21.9 W kg −1 ) and RGO‐RuO 2 //RGO‐RuO 2 (12.4 W h kg −1 at 22.7 W kg −1 ). [ 74 ] Figure 10d reveals the charge storage retention of the symmetric electrode that is exhibit the charge storage retention of 88.36% after 3000 CV cycles.…”

Section: Resultsmentioning

confidence: 99%

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

Payami

Teimuri‐Mofrad

2021

Applied Organom Chemis

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Redox‐active porous polymers are promising electrode materials due to various advantages including high specific surface area and porosity, facile synthesizing route, and excellent chemical and thermal stability. Herein, a simple and cost‐effective Schiff base reaction was used to prepare the ferrocene (Fc) containing porous organic polymer (POP) through the formation of a C‐N bond between melamine and 1,1′‐diacetylferrocene. After successful preparation of the Fc‐POP, Fc‐POP/PANI nanohybrid was prepared by the hybridization of synthesized redox‐active polymer with polyaniline (PANI) as a conductive polymer. Finally, the CNT (carbon nanotube)‐containing nanocomposites were prepared by adding various amounts of the CNT to Fc‐POP/PANI nanohybrid. All as‐prepared electrode materials were thoroughly characterized with usual analyses. The Fc‐POP/PANI/CNT20 revealed a high specific capacitance of 494 mAh g−1 at 2.5 A g−1 and excellent charge storage retention (92.1%) over 5000 cycles. Also, the fabricated symmetric cell exhibits a high energy density of 76 W h kg−1 and a high‐power density of 5840 W kg−1.

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Section: Resultsmentioning

confidence: 99%

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

Payami

Teimuri‐Mofrad

2021

Applied Organom Chemis

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“…richer redox reactions compared to single metallic oxide, and thus helps to further improve the capacitive performance of the composites [16]. NDG/Fe3O4 and NDG/Mn3O4 exhibit higher Csp compared to NDG because the dispersion of metal oxides between N-doped graphene sheets prevent the sheets from restacking to increase the number of accessible sites for electrolyte ions [17]. The effect of the scan rate on the capacitive performance of NDG/Mn3O4/Fe3O4 was studied between 50 and 500 mV/s.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Supercapacitive Performance of N-Doped Graphene/Mn3O4/Fe3O4 as an Electrode Material

et al. 2019

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Nitrogen-doped graphene (NDG) and mixed metal oxides have been attracting much attention as the combination of these materials resulted in enhanced electrochemical properties. In this study, a composite of nitrogen-doped graphene/manganese oxide/iron oxide (NDG/Mn3O4/Fe3O4) for a supercapacitor was prepared through the hydrothermal method, followed by freeze-drying. Field emission scanning electron microscopy (FESEM) images revealed that the NDG/Mn3O4/Fe3O4 composite displayed wrinkled-like sheets morphology with Mn3O4 and Fe3O4 particles attached on the surface of NDG. The presence of NDG, Mn3O4, and Fe3O4 was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The electrochemical studies revealed that the NDG/Mn3O4/Fe3O4 composite exhibited the highest specific capacitance (158.46 F/g) compared to NDG/Fe3O4 (130.41 F/g), NDG/Mn3O4 (147.55 F/g), and NDG (74.35 F/g) in 1 M Na2SO4 at a scan rate of 50 mV/s due to the synergistic effect between bimetallic oxides, which provide richer redox reaction and high conductivity. The galvanostatic charge discharge (GCD) result demonstrated that, at a current density of 0.5 A/g, the discharging time of NDG/Mn3O4/Fe3O4 is the longest compared to NDG/Mn3O4 and NDG/Fe3O4, indicating that it had the largest charge storage capacity. NDG/Mn3O4/Fe3O4 also exhibited the smallest resistance of charge transfer (Rct) value (1.35 Ω), showing its excellent charge transfer behavior at the interface region and good cyclic stability by manifesting a capacity retention of 100.4%, even after 5000 cycles.

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“…Hence, by combining ZrO 2 with narrow band gap semiconductor, photocatalytic activity can be enhanced. There are many reports available for the synthesis of NC with MnFe 2 O 4 for many applications such as MnFe 2 O 4 /rGO NC for ultra-stable supercapacitors [29], ZnO/MnFe 2 O 4 synthesis by organic-free media for dye degradation under natural sunlight [30], MnFe 2 O 4 /ZrO 2 by sol-gel method for sonocatalytic and photocatalytic degradation of methylene blue and methyl orange dye under UV-visible light [31], MnFe 2 O 4 /g-C 3 N 4 /TiO 2 NC generated by chemical impregnation method for degradation of methyl orange dye simulated under irradiation of solar light [32], magnetic microsphere MnFe 2 O 4 /polyaniline composite with electro-catalytic activity for oxygen reduction reaction [33] and MgFe 2 O 4 /ZrO 2 NC [34] by modified citrate gel method for hyperthermia applications.…”

Section: Introductionmentioning

confidence: 99%

MnFe2O4/ZrO2 nanocomposite as an efficient magnetically separable photocatalyst with good response to sunlight: preparation, characterization and catalytic mechanism

Meena¹,

Anantharaju

Vidya³

et al. 2020

SN Appl. Sci.

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Magnetically separable novel nano-MnFe 2 O 4 /ZrO 2 nanocomposite (NC) and MnFe 2 O 4 (MFO) samples were synthesized by an efficient solution combustion methodology. The structure, morphology and optical properties were characterized through powder X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy and UV-Vis spectroscopy. The photocatalytic activity of MnFe 2 O 4 /ZrO 2 nanocomposite was analysed for decolourization efficiency of methylene blue (MB) and textile dye wastewater under natural sunlight irradiation. The results demonstrated that the decolourization response of the MnFe 2 O 4 /ZrO 2 nanocomposite was 95% for MB and 59% for textile dye wastewater in 90 min. The photocatalytic performance of MnFe 2 O 4 /ZrO 2 was almost 1.4 times as high as pure MnFe 2 O 4 was ascribed to the synergic effect and interfacial interaction across MnFe 2 O 4 nanoparticle (NP) and ZrO 2 that leads to separation of electron-hole pairs efficiently and broadened light absorption of the composite (2.42 eV) compared to MnFe 2 O 4 (2.15 eV). The effective optimized parameters such as solution pH of 7, nanocomposite dosage of 60 mg and initial dye concentration of 20 ppm were studied on photocatalytic performance for the removal of MB dye. The magnetically separable MnFe 2 O 4 / ZrO 2 nanocomposite proved to be highly active and a stable catalyst in five successive photodecolourization cycles for an aqueous solution of MB dye under sunlight irradiation. Furthermore, the possible sunlight photocatalytic mechanism of the MnFe 2 O 4 /ZrO 2 nanocomposite was proposed. Due to its enhancement in photocatalytic activity, this NC has great potential towards the environmental remediation for practical photocatalytic application towards wastewater treatment.

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Facile synthesis of a MnFe₂O₄/rGO nanocomposite for an ultra-stable symmetric supercapacitor

Abstract: A symmetric supercapacitor based on a MnFe2O4/rGO nanocomposite prepared from expanded graphite.

Cited by 119 publications

References 61 publications

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

Supercapacitive Performance of N-Doped Graphene/Mn3O4/Fe3O4 as an Electrode Material

MnFe2O4/ZrO2 nanocomposite as an efficient magnetically separable photocatalyst with good response to sunlight: preparation, characterization and catalytic mechanism

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Facile synthesis of a MnFe2O4/rGO nanocomposite for an ultra-stable symmetric supercapacitor

Abstract: A symmetric supercapacitor based on a MnFe2O4/rGO nanocomposite prepared from expanded graphite.

Cited by 119 publications

References 61 publications

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

CNT‐containing redox active nanohybrid: a promising ferrocenyl‐based electrode material for outstanding energy storage application

Supercapacitive Performance of N-Doped Graphene/Mn3O4/Fe3O4 as an Electrode Material

MnFe2O4/ZrO2 nanocomposite as an efficient magnetically separable photocatalyst with good response to sunlight: preparation, characterization and catalytic mechanism

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Facile synthesis of a MnFe₂O₄/rGO nanocomposite for an ultra-stable symmetric supercapacitor