Studies on Electrochemical Properties of ZnO/rGO Nanocomposites as Electrode Materials for Supercapacitors

Mohan, Ranjith; Kumar, Avshish; Arora, Naman; Subha, J.

doi:10.1080/1536383x.2014.971117

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…However, the capacitance achieved was only 985 mF/cm 2 at 2 mA/cm . In our previous work, we prepared rGO/ZnO nanocomposite using hydrothermal methods, which exhibits 280 F/g capacitance …”

Section: Introductionmentioning

confidence: 99%

“…A ternary nanocomposite of PPY/Fe 2 O 3 /rGO was prepared using the hydrothermal method, and the capacitance of 140 F/g was achieved by Moyseowicz et al Xiaojuan et al reported rGO/graphite/PANI with capacitance 421 F/g where they synthesized nanocomposite via chemical oxidative polymerization of PANI while rGO acts as the matrix . Further, CP‐based ternary nanocomposites were also studied for example, Yihan Wang reported PPY/GNs/PANI for thermoelectric power applications and Javad Shaban et al also reported ternary nanocomposites of PANI/rGO/AuNPs for supercapacitor applications. To explore the properties of ternary nanocomposites as electrode materials, an attention needs to be focused on the development of new compositions of these composites.…”

Section: Introductionmentioning

confidence: 99%

“…18 In our previous work, we prepared rGO/ZnO nanocomposite using hydrothermal methods, which exhibits 280 F/g capacitance. 19 In addition, a few research groups focused on the ternary nanocomposites. A ternary nanocomposite of PPY/Fe 2 O 3 /rGO was prepared using the hydrothermal method, and the capacitance of 140 F/g was achieved by Moyseowicz et al 20 Xiaojuan et al reported rGO/graphite/PANI with capacitance 421 F/g where they synthesized nanocomposite via chemical oxidative polymerization of PANI while rGO acts as the matrix.…”

Section: Introductionmentioning

confidence: 99%

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Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

et al. 2019

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Summary The present research work aimed to study the electrochemical performance of the rGO/PPY/PANI ternary nanocomposite electrodes for supercapacitor applications. The nanocomposites have been prepared by physical blending of rGO with conducting polymers PANI and PPY in five different ratios. The prepared nanocomposites were examined by XRD, IR, Raman, SEM, and XAS characterizations, and from the results, it was found that ternary nanocomposites formed in cauliflower shape, in which PPY and PANI nanoparticles are decorated on to the rGO matrix. In addition, the electrochemical performance of the prepared nanocomposites were studied using cyclic voltammetry, galvanostatic charge‐discharge, and electrochemical impedance spectroscopic studies. The highest values of capacitance, energy density, and power density values achieved were 317.5 F/g, 254 Wh/kg, and 1508.9 W/kg for nanocomposite, respectively, as expected from the synergistic properties of two types of electrode materials resulting in the nanocomposites with hybrid and improved properties. Further, the cyclic stability was also analyzed by performing 4000 long cycles, and the retained capacitance during such long cycles indicates the high potential of rGO/PPY/PANI ternary nanocomposites as electrodes for future energy requirement.

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“…However, the capacitance achieved was only 985 mF/cm 2 at 2 mA/cm . In our previous work, we prepared rGO/ZnO nanocomposite using hydrothermal methods, which exhibits 280 F/g capacitance …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

et al. 2019

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“…The presence of O 2 functional groups on the basal plane and sheet edges of GO acts as a building block for the fabrication of diverse, active materials through covalent and noncovalent methods. 27,28 The unique electronic frameworks of GO functioned as an effective catalyst and promising materials for conversion and capture of toxic gases such as CO, CO 2 , NH 3 and NO 2 . 29 However, rGO is a promising candidate in contrast to pristine graphene in detecting various gas compounds due to their lower production cost, easily tunable structures, dispersing ability in the water, remarkable electrical conductivity and chemically active sites.…”

mentioning

confidence: 99%

“…When compared with the above methods, electrodeposition is a potential alternative employed for the formation of ZnO/rGO hybrids which allows doping of ZnO nanobased structures in a controlled manner. 42 Raja et al (2015) reported the synthesis of ZnO/rGO hybrids by a wet chemical method. This technique facilitated more flexibility and experimental control which enhanced the incorporation of a broad category of materials into the rGO.…”

mentioning

confidence: 99%

Review—Recent Advancements of ZnO/rGO Nanocomposites (NCs) for Electrochemical Gas Sensor Applications

Rumjit

Thomas

Lai

et al. 2021

J. Electrochem. Soc.

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Zinc oxide (ZnO)/rGO (reduced graphene oxide) composites have recently gained much interest in electrochemical gas sensor devices due to their fascinating electrochemical properties such as active surface sites, high surface area to volume ratios and high carrier large mobility. ZnO is a significant gas sensing material due to its excellent response towards oxidizing/reducing gases, easy preparation, and less toxicity. At the same time, graphene oxide and reduced graphene oxide-based sensors exhibited high surface area, and the presence of surface functional groups facilitated gas sensing properties. The synergistic effect of ZnO/rGO improved sensing properties and binding stability with macromolecules, thus making them potential candidates for the design of gas sensor devices. However, the fabrication and utilization of gas sensors operating at the low-temperature condition is still a significant hurdle. This review encompasses the recent advancements of ZnO/rGO nanostructures synthesis, studying nanocomposite interactions in various gas sensing applications. This study also proposes future outlooks on the ZnO-rGO gas sensors high selectivity and sensitivity for gas detection at low working temperature.

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Nanocomposite having Flower ‐Shaped Morphology as Electrode for Electrochemical Supercapacitor Applications

et al. 2019

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In the present research work, we reported the nanocomposite having flower shaped morphology as electrode by the combination of metal (Cu) nanoparticles, metal oxide (ZnO nanorods) with reduced graphene oxide (rGO) for electrochemical super capacitor applications by using one pot synthesis method. The nanocomposite was characterized by XRD, Infrared, Raman spectroscopies and morphological studies were done using SEM and TEM. The electrochemical properties of nanocomposites were studied by measuring the specific capacitance using cyclic voltammetry (CV) and galvanostatic charge‐discharge techniques in different electrolyte solutions, among them 3.0 M KOH solution showed high capacitance. The experimental results, indicated that the homogeneous distribution of ZnO nanorods and Cu nanoparticles in rGO, which provides the short path for electrons transport and ions diffusion. The specific capacitance value achieved for nanocomposite is 365.5 F/g. From the studies, it can be concluded that the nanocomposite is a promising electrode material for electrochemical super capacitor applications.

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Studies on Electrochemical Properties of ZnO/rGO Nanocomposites as Electrode Materials for Supercapacitors

Cited by 18 publications

References 17 publications

Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

Review—Recent Advancements of ZnO/rGO Nanocomposites (NCs) for Electrochemical Gas Sensor Applications

Nanocomposite having Flower ‐Shaped Morphology as Electrode for Electrochemical Supercapacitor Applications

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