Nanomorphology-dependent pseudocapacitive properties of NiO electrodes engineered through a controlled potentiodynamic electrodeposition process

Kore, Rohan M.; Mane, Rajaram S.; Naushad, Mu.; Khan, Mohammad Rizwan; Lokhande, B. J.

doi:10.1039/c5ra26041h

Cited by 39 publications

(12 citation statements)

References 39 publications

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“…To determine the wettability behavior of the PAni thin films, contact angle measurement was carried out as shown in Figure . In general, the surface water contact angle is inversely proportional to the wettability, fixed from Young's relation . Alternatively, the contact angle value depends upon local inhomogeneity, chemical composition and the surface morphology of the electrode.…”

Section: Resultsmentioning

confidence: 99%

“…High cost, less abundance, and toxic nature have limited the commercial use of RuO 2 . The researchers have been trying to use oxides of manganese, nickel, cobalt, vanadium, copper, and iron as electrode materials. The conducting polymers are also able to store the charges using insertion and de‐insertion of ions from the electrolyte in their matrix (doping–dedoping).…”

Section: Introductionmentioning

confidence: 99%

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Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Thokale

Kore

Kambale

et al. 2019

Macromolecular Symposia

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The present work elaborates the aqueous route synthesis of polyaniline (PAni) electrodes for supercapacitors using chemical bath deposition (CBD) method and study of effective of scan rate on the cyclic voltammetric (CV) behavior. In the synthesis work, 1 m aniline and 1 m H2SO4 were taken in 2:2 ratio and kept for constant stirring and 1 m aqueous solution of (NH4)2S2O8 was added slowly in it. Stainless steel substrates were immersed in the reaction bath at room temperature for 1 h. The formation of PAni was confirmed by FT‐IR spectroscopic study. XRD analysis confirms the amorphous nature of the prepared PAni thin films. Contact angle study shows the hydrophilic behavior of the PAni electrodes. Obtained electrodes were subjected to cyclic voltammetric study at various scan rate from 5 to 100 mV s–1 in 1 m KOH electrolyte. Observed maximum specific capacitance was 516.34 F g–1 at 5 mV s–1 scan rate.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Thokale

Kore

Kambale

et al. 2019

Macromolecular Symposia

Self Cite

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“…At higher scan rates, the accessibility of ions which enter into the pores of electrode material, and their transport is limited due to their hindered diffusion. As a result, only the outer surface of the electrode could be utilized for charge storage …”

Section: Resultsmentioning

confidence: 99%

Electrochemical co‐deposition and characterization of polyaniline and manganese oxide nanofibrous composites for energy storage properties

et al. 2017

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Ion diffusion rate and contact surface area of conducting polymers increased by composite formation with nanometric-size materials make them promising materials in the fabrication of energy storage devices. In this work, electronically conducting polyaniline and manganese oxide (PANI/MnO 2 ) nanofibrous composites were electrochemically co-deposited on stainless steel from binder-free electrolyte solution. Structural characterization and morphological characterization of the materials were performed with Fourier-transformed infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). SEM images show fibrous micro/nano-architecture of the composites with cluster networking structure having 200-500 nm length and 100-200 nm diameter. Electrochemical and energy storage properties of the assynthesized materials were investigated with cyclic voltammetry (CV), galvanostatic charge discharge curves(GCDC), and potentiostatic electrochemical impedance spectroscopy (PEIS) without any binders. Electrochemical measurements as well as galvanostatic charge discharge curves at 1 mA constant current have shown maximum specific capacitance of 149 F/g for the composite prepared with 0.15 M MnSO 4 in the co-deposition bath. The composites retain 67% specific capacitance even after 400 cycles, indicating the stability of synthesized composite. PEIS confirms the pseudocapacitive nature of the synthesized composites. K E Y W O R D S conducting polymers, energy storage, impedance spectroscopy, PANI/MnO x composites How to cite this article: Shah A-u-HA, Khan MO, Bilal S, Rahman G, Hung HV. Electrochemical co-deposition and characterization of polyaniline and manganese oxide nanofibrous composites for energy storage properties.

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“…Ni +3 ) which is the reversible redox process (eqn. 1) [35][36]. Further, the curve consists of a second peak at 0.37 V. This may be attributed due to the contribution of Ni foam (i.e.…”

Section: Resultsmentioning

confidence: 93%

Annealing environment effects on the electrochemical behavior of supercapacitors using Ni foam current collectors

Jadhav¹,

Kore²,

Thorat³

et al. 2018

Mater. Res. Express

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Nickel (Ni) foam-based symmetric/asymmetric electrochemical supercapacitors benefit from a randomly 3D structured porous geometry that functions as an active material support and as a current collector. The surface composition stability and consistency of the current collector is critical for maintaining and consistency supercapacitor response, especially for various mass loading and mass coverage. Here we detail some annealing environment conditions that change the surface morphology, chemistry and electrochemical properties of Ni foam by NiO formation. Air-annealing at 400 and 800 °C and annealing also in N2 and Ar at 800°C result in the in-situ and ex-situ formation of NiO on the Ni foam (NiO@Ni).Oxidation of Ni to NiO by several mechanisms in air and inert atmospheres to form an NiO coating is subsequently examined in supercapacitors, where the electrochemical conversion through Ni(OH)2 and NiOOH phases influence the charge storage process. In parallel, the grain boundary density reduction by annealing improves the electronic conductivity of the foam current collector. The majority of stored charge occurs at the oxidized Ni-electrolyte interface. The changes to the Ni metal surface that can be caused by chemical environments, heating and high temperatures that typically occur when other active materials are grown on Ni directly, should be considered in the overall response of the electrode, and this may be general for metallic current collectors and foams that can oxidize at elevated temperatures and become electrochemically active.

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Nanomorphology-dependent pseudocapacitive properties of NiO electrodes engineered through a controlled potentiodynamic electrodeposition process

Abstract: Three nickel oxide (NiO) electrodes of different nanostructures have been successfully engineered through a controlled potentiodynamic electrodeposition process, which show a noticeable effect on pseudocapacitive properties of NiO electrodes.

Cited by 39 publications

References 39 publications

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Electrochemical co‐deposition and characterization of polyaniline and manganese oxide nanofibrous composites for energy storage properties

Annealing environment effects on the electrochemical behavior of supercapacitors using Ni foam current collectors

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