Morphological modulation of polypyrrole thin films through oxidizing agents and their concurrent effect on supercapacitor performance

Shinde, S.S.; Gund, Girish S.; Dubal, Deepak P.; Jambure, S.B.; Lokhande, C.D.

doi:10.1016/j.electacta.2013.10.174

Cited by 79 publications

(45 citation statements)

References 37 publications

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“…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). The conducting polymers such as PPy, PTh, and PAni are being used in pure and hybrid forms . Among these polymers, PAni due to tunable conductivity, low cost, facile synthesis, high capacitive performance, good environment stability, and interesting redox properties is preferred most .…”

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

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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: 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

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“…The quality of the polymer is greatly influenced by the oxidizing agent used for polymerization of PPY on the cellulose membrane. In this work, the oxidizing agent APS produced a compact structure with a rough, homogeneous, mud‐like morphology, as previously described .…”

Section: Resultsmentioning

confidence: 91%

“…With the formation of a more compact material, there is a larger polymer area, which increases the interaction of the analytes with CM-PPy, increasing EC extraction efficiency. A schematic of the reaction of pyrrole with the oxidizing agent APS is shown in Supporting Information Figure S2 [21].…”

Section: Optimization Of Cm-ppy Membrane Preparationmentioning

confidence: 99%

Cellulose membrane modified with polypyrrole as an extraction device for the determination of emerging contaminants in river water with gas chromatography–mass spectrometry

Noronha

Bergamini

Marcolino‐Júnior

et al. 2018

J of Separation Science

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In this study, a simple, efficient, and reusable device based on cellulose membranes modified with polypyrrole was developed to extract 14 emerging contaminants from aqueous matrices. For chemical polymerization, a low-cost cellulose membrane was immersed in 0.1 mol/L pyrrole and 0.5 mol/L ammonium persulfate for 40 min in an ice/water bath. The cellulose membranes modified with polypyrrole were accommodated in a polycarbonate holder suitable for solid-phase extraction disks. Solid-phase extraction parameters that affect extraction efficiency, such as sample volume, pH, flow rate, and desorption were optimized. Subsequently, determination of target compounds was performed by gas chromatography with mass spectrometry. The linear range for analytes ranged from 0.05 to 500 μg/L, with coefficients of determination above 0.990. The limits of quantification varied between 0.05 and 10 μg/L, with relative standard deviations lower than 17%. The performance of the proposed cellulose membranes modified with polypyrrole device for real samples was evaluated after extraction of emerging contaminants from a river water sample from the city of Curitiba, Brazil. Bisphenol A (6.39 μg/L), caffeine (17.83 μg/L), and paracetamol (19.28 μg/L) were found in these samples.

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“…Concentrated acidic solution of K 2 Cr 2 O 7 is used as an oxidizing agent to partially oxidize the g‐C 3 N 4 sheet which triggers breaking down of the extended g‐C 3 N 4 sheets into 1‐D filaments . Prolonged stirring of these filaments in the potassium dichromate solution,, promotes crumpling of the stretched filaments followed by their self‐assembly into solid pillar‐like structures of T‐gCNP.…”

Section: Resultsmentioning

confidence: 99%

Li–Ion‐Conducting Pillar‐Like Graphitic Carbon Nitrides as Novel Anodes for Li–Ion Batteries

2018

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There is still a sustained effort to explore and develop new electrode materials for Li‐ion rechargeable batteries. Presently, materials exploration not only focuses on the enhancement of Li‐ion battery performance, but also targets to make them cheaper and safer. This expectedly will make them market competitive against established battery chemistries. Graphitic carbon nitride (g‐C3N4), which has emerged as an important photon harvesting material, is demonstrated here as a potential efficient and cost effective alternative anode for Li‐ion cells. The g‐C3N4, synthesized here from pyrolysis of thiourea, possesses both graphitic and amorphous phases (T‐gCN). The intercalation of Li+ ions in the densely packed layered structure of T‐gCN (lithiated T‐gCN) results in an ionic conductivity ≈ 10−7 S/cm compared to the non‐lithiated T‐gCN which shows no ionic conductivity. The ionic transport takes place via both the amorphous and graphitic phases in T‐gCN. The T‐gCN when treated with an acidified dichromate solution disintegrates in to filaments, which on prolonged stirring self‐assemble into pillar‐like g‐C3N4 structures (T‐gCNP). The T‐gCNP exhibited higher crystallinity and an even higher ionic conductivity compared to the T‐gCN. The T‐gCN and T‐gCNP deliver modest specific capacities compared to battery grade graphite and other reported carbonaceous/non‐carbonaceous materials in the half‐cell operation. However, when coupled with cathodes such as LiFePO4 and LiMn2O4 in a full Li‐ion cell, the specific capacity obtained in the 1st discharge cycle for both LiFePO4 and LiMn2O4 are very close to their theoretical capacities. The cells display stable cycling and good current rate capability over widely varying current values. This is remarkable in spite of the fact that the samples are not completely crystalline with an average carbon content of approximately 31%. It is envisaged that a continuous network persists for electron transport for their participation in the reversible redox process.

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Morphological modulation of polypyrrole thin films through oxidizing agents and their concurrent effect on supercapacitor performance

Cited by 79 publications

References 37 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

Cellulose membrane modified with polypyrrole as an extraction device for the determination of emerging contaminants in river water with gas chromatography–mass spectrometry

Li–Ion‐Conducting Pillar‐Like Graphitic Carbon Nitrides as Novel Anodes for Li–Ion Batteries

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