Poly(3,4-ethylenedioxythiophene)/nickel disulfide microspheres hybrid in energy storage and conversion cells

Mukkabla, Radha; Deepa, Melepurath; Srivastava, Avanish Kumar

doi:10.1039/c5ra20917j

Cited by 11 publications

(10 citation statements)

References 58 publications

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“…Because of that, the BET surface area of pristine PEDOT lms was found to be very low (2 m 2 g À1 ). 49 Therefore, even though the electrochemical preparation of PEDOT electrodes is similar to ours, the morphology of the resulting lms is not comparable and, therefore, our PEDOT electrodes are expected to show greater surface area values. However, the scarce number of publications reporting this parameter obliges to take it under consideration.…”

Section: Resultsmentioning

confidence: 74%

“…Unfortunately, in this case the BET analysis was not a feasible technique because of the limitations in the mass of PEDOT produced by the electrochemical synthetic route. Indeed, it is worth noting that the amount of works specifying quantitatively the surface area and porosity is relatively scarce [46][47][48][49][50] probably due to the limitations of the BET test. Thus, the morphology of PEDOT electrodes for energy storage applications is frequently described qualitatively by examining SEM micrographs, especially when the polymer is generated by anodic polymerization.…”

Section: Resultsmentioning

confidence: 99%

“…The BET specic surface area of the resulting GO/PEDOT composites was 19 m 2 g À1 . 48 Mukkabla et al 49 compared the redox pseudocapacitive behavior of NiS 2 microspheres embedded in a PEDOT layer with that of pristine PEDOT. The electrodes were prepared electrochemically under potentiostatic conditions using an ionic liquid.…”

Section: Resultsmentioning

confidence: 99%

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Towards sustainable solid-state supercapacitors: electroactive conducting polymers combined with biohydrogels

et al. 2016

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Solid-state organic electrochemical supercapacitors (OESCs) have been fabricated using poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes, a biohydrogel as electrolyte system, and polyaniline fibers as redox additive. The effectivity of sodium alginate, kappa-carrageenan, chitosan and gelatin hydrogels as electrolytic media has been evaluated considering different criteria. Results indicate that kappa-carrageenan-based hydrogel is the most suitable to perform as electrolyte due to the appropriate combination of properties: mechanical stability, ease of preparation, lack of water leaking, and good medium for the electrochemical response of PEDOT electrodes. Cyclic voltammetry and galvanostatic charge-discharge assays indicate that OESCs based on PEDOT electrodes and kappa-carrageenan hydrogel as electrolyte exhibits a good supercapacitor response in terms of specific capacitance, cycling stability, small leakage current and low self-discharging tendency. On the basis of these good properties, four OESC devices were assembled in series and used to power a red LED, confirming that, in addition to advantageous characteristics (e.g. elimination of liquid leaking and enhancement of the device compactness), the designed biohydrogel-containing OESC exhibits potential for practical applications. On the other hand, preliminary assays have been performed loading the kappa-carrageenan hydrogel with polyaniline nanofibers, which act as a redox additive. OESC devices prepared using such loaded biohydrogel have been found to be very promising and, therefore, future work is oriented towards the improvement of their design.Peer ReviewedPostprint (author's final draft

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

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Towards sustainable solid-state supercapacitors: electroactive conducting polymers combined with biohydrogels

et al. 2016

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“…The morphology of as synthesized polymeric system is shown in the scanning electron microscopy (SEM) images, Figure S1a and S1c (Supporting Information) and the elemental composition by energy dispersive spectroscopy (EDS) clearly demonstrate the presence of chloride dopant, Supplementary Figure S1b and S1d suggesting as synthesized polymers are in the conducting state. It is well known that the redox active conducting polymer's redox energy can be tuned by the surrounding media due to the dependence of the Nernstian equilibrium on the concentration of protons, cyclic voltammograms Figure S2a and S2b (Supporting Information). The coupling of protons during the electron transfer can be seen from the shift of open circuit voltage with respect to pH, Figure S2c and S2d (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

An Interface‐Controlled Redox Switch for Wastewater Remediation

et al. 2017

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Bipolar junction transistors (BJTs) can function as electrically reversible switches; nevertheless, triggering such circuits requires a distinct voltage bias at the base terminal. Here, we show a proof‐of‐concept of an electrochemical switching device equipped with a redox electrode whose bi‐stable interfacial chemistry, reliant on hydronium ion strength, can provide distinct logic HIGH (1) and logic LOW (0) levels of operation, enabling it to control and command an electronic circuit without the aid of any external voltage input. Electrochemical impedance spectroscopy, quartz crystal microbalance studies, and UV/Vis spectroscopy demonstrate that discrete logic levels are controlled by the solvent‐mediated charge injection/ejection kinetics at the redox‐active half‐cell electrode, leading to a chemically reversible switch with a response time of approximately 1 s and an operating speed of 225 cycles per hour. We demonstrate that the logic HIGH level of the interfacial twin states is actuated when exposed to acid‐contaminated wastewater, automatically triggering the command for remediation.

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“…Further improvement in performance of NiS 2 was achieved by introducing conducting polymer PEDOT and carbonaceous material. [ 128,129 ]…”

Section: Ni‐chalcogenides Based Energy Conversion and Storage Devicesmentioning

confidence: 99%

Emergence of Ni‐Based Chalcogenides (S and Se) for Clean Energy Conversion and Storage

Maurya

Khaladkar

Horn

et al. 2021

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Nickel chalcogenide (S and Se) based nanostructures intrigued scientists for some time as materials for energy conversion and storage systems. Interest in these materials is due to their good electrochemical stability, eco‐friendly nature, and low cost. The present review compiles recent progress in the area of nickel‐(S and Se)‐based materials by providing a comprehensive summary of their structural and chemical features and performance. Improving properties of the materials, such as electrical conductivity and surface characteristics (surface area and morphology), through strategies like nano‐structuring and hybridization, are systematically discussed. The interaction of the materials with electrolytes, other electro‐active materials, and inactive components are analyzed to understand their effects on the performance of energy conversion and storage devices. Finally, outstanding challenges and possible solutions are briefly presented with some perspectives toward the future development of these materials for energy‐oriented devices with high performance.

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Poly(3,4-ethylenedioxythiophene)/nickel disulfide microspheres hybrid in energy storage and conversion cells

Abstract: The redox pseudocapacitive response of a hybrid material made up of NiS2 microspheres embedded in a poly(3,4-ethylenedioxythiophene) or (PEDOT) layer is demonstrated for the first time.

Cited by 11 publications

References 58 publications

Towards sustainable solid-state supercapacitors: electroactive conducting polymers combined with biohydrogels

Towards sustainable solid-state supercapacitors: electroactive conducting polymers combined with biohydrogels

An Interface‐Controlled Redox Switch for Wastewater Remediation

Emergence of Ni‐Based Chalcogenides (S and Se) for Clean Energy Conversion and Storage

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