In-situ synthesis of mixed-phase carbon material using simple pyrolysis method for high-performance supercapacitor

Mandal, Manoranjan; Subudhi, Subhasri; Nayak, Alok Kumar; Alam, Injamul; Subramanyam, Bvrs; Maheswari, Rabi Prakash; Patra, Sandip; Mahanandia, Pitamber

doi:10.1016/j.diamond.2022.109209

Cited by 6 publications

(3 citation statements)

References 66 publications

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“…From the high-resolution image, it is apparent that cocoon-like particles consist of small block shapes particles which were randomly distributed over the surface (Figures d and S3 and S4). This typical morphology of the FeAsO 4 particles is expected to provide a better surface area during electrocatalytic investigation . The energy-dispersive X-ray (EDX) mapping supported a homogeneous distribution of the constituting elements Fe, As, and O throughout the surface of the particles (Figure e–h).…”

Section: Resultsmentioning

confidence: 69%

“…This typical morphology of the FeAsO 4 particles is expected to provide a better surface area during electrocatalytic investigation. 43 The energydispersive X-ray (EDX) mapping supported a homogeneous distribution of the constituting elements Fe, As, and O throughout the surface of the particles (Figure 1e−h). Furthermore, the EDX spectra of the studied material confirmed the existence of Fe and As in an appropriate atomic ratio (Figure S5).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction

Adak,

Basak,

Chakraborty

2023

ACS Org. Inorg. Au

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Transition metal-based ABO4-type materials have now been paid significant attention due to their excellent electrochemical activity. However, a detailed study to understand the active species and its electro-evolution pathway is not traditionally performed. Herein, FeAsO4, a bimetallic ABO4-type oxide, has been prepared solvothermally. In-depth microscopic and spectroscopic studies showed that the as-synthesized cocoon-like FeAsO4 microparticles consist of several small individual nanocrystals with a mixture of monoclinic and triclinic phases. While depositing FeAsO4 on three-dimensional nickel foam (NF), it can show oxygen evolution reaction (OER) in a moderate operating potential. During the electrochemical activation of the FeAsO4/NF anode through cyclic voltammetric (CV) cycles prior to the OER study, an exponential increment in the current density (j) was observed. An ex situ Raman study with the electrode along with field emission scanning electron microscopy imaging showed that the pronounced OER activity with increasing number of CV cycles is associated with a rigorous morphological and chemical change, which is followed by [AsO4]3– leaching from FeAsO4. A chronoamperometric study and subsequent spectro- and microscopic analyses of the isolated sample from the electrode show an amorphous γ-FeO(OH) formation at the constant potential condition. The in situ formation of FeO(OH)ED (ED indicates electrochemically derived) shows better activity compared to pristine FeAsO4 and independently prepared FeO(OH). Tafel, impedance spectroscopic study, and determination of electrochemical surface area have inferred that the in situ formed FeO(OH)ED shows better electro-kinetics and possesses higher surface active sites compared to its parent FeAsO4. In this study, the electrochemical activity of FeAsO4 has been correlated with its structural integrity and unravels its electro-activation pathway by characterizing the active species for OER.

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Section: Resultsmentioning

confidence: 69%

Section: ■ Results and Discussionmentioning

confidence: 99%

Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction

Adak,

Basak,

Chakraborty

2023

ACS Org. Inorg. Au

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“…Supercapacitors in several industries are used for energy harvesting and high-power systems in electric vehicles. Recently, supercapacitors based on CNTs composite electrodes have received more attention due to the electrical and chemical properties of CNTs [1][2][3][4][5][6][7]. Growth in the publication of CNT-based supercapacitors is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

CNTs-Supercapacitors: A Review of Electrode Nanocomposites Based on CNTs, Graphene, Metals, and Polymers

et al. 2023

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Carbon nanotubes (CNTs), due to mechanical, electrical, and surface area properties and their ability to adapt to different nanocomposite structures, are very substantial in supercapacitor electrodes. In this review, we have summarized high-performance, flexible, and symmetry CNT supercapacitors based on the CNTs/graphene, CNTs/metal, and CNTs/polymer electrodes. To present recent developments in CNT supercapacitors, we discuss the performance of supercapacitors based on electrical properties such as specific capacitance (SC), power and energy densities, and capacitance retention (CR). The comparison of supercapacitor nanocomposite electrodes and their results are reported for future researchers.

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Wheat-bran-based hierarchically porous biochar as electrode materials for supercapacitors

Zhang,

Ma,

et al. 2023

Advanced Powder Technology

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In-situ synthesis of mixed-phase carbon material using simple pyrolysis method for high-performance supercapacitor

Cited by 6 publications

References 66 publications

Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction

Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction

CNTs-Supercapacitors: A Review of Electrode Nanocomposites Based on CNTs, Graphene, Metals, and Polymers

Wheat-bran-based hierarchically porous biochar as electrode materials for supercapacitors

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In-situ synthesis of mixed-phase carbon material using simple pyrolysis method for high-performance supercapacitor

Cited by 6 publications

References 66 publications

Ease of Electrochemical Arsenate Dissolution from FeAsO4 Microparticles during Alkaline Oxygen Evolution Reaction

Ease of Electrochemical Arsenate Dissolution from FeAsO4 Microparticles during Alkaline Oxygen Evolution Reaction

CNTs-Supercapacitors: A Review of Electrode Nanocomposites Based on CNTs, Graphene, Metals, and Polymers

Wheat-bran-based hierarchically porous biochar as electrode materials for supercapacitors

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Product

Resources

About

Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction

Ease of Electrochemical Arsenate Dissolution from FeAsO₄ Microparticles during Alkaline Oxygen Evolution Reaction