Impedance characteristics analysis of rGO/polymers (PVDF, PMMA, PTFE) nanocomposite membranes

Uniyal, Divya; Prasad, Brijesh; Kumar, K.C. Nithin; Chandra, Sarita; Panwar, Varij; Juneja, Pradeep; Agarwal, Vivechna; Gill, Fateh Singh

doi:10.1016/j.matpr.2019.11.309

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…• Understanding the hydrophobic behaviors of different polymeric and inorganic membranes in lithium air batteries since there are number of hydrophobic membranes available [129][130][131][132][133][134][135]. However, their suitability for LABs needs to be investigated.…”

Section: Future Directionmentioning

confidence: 99%

Aprotic lithium air batteries with oxygen-selective membranes

Uzair

Zahoor

Shaikh

et al. 2022

Mater Renew Sustain Energy

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Rechargeable batteries have gained a lot of interests due to rising trend of electric vehicles to control greenhouse gases emissions. Among all type of rechargeable batteries, lithium air battery (LAB) provides an optimal solution, owing to its high specific energy of 11,140 Wh/kg comparable to that of gasoline 12,700 Wh/kg. However, LABs are not widely commercialized yet due to the reactivity of the lithium anode with the components of ambient air such as moisture and carbon dioxide. To address this challenge, it is important to understand the effects of moisture on the electrochemical performance of LAB. In this review, the effects of ambient air on the electrochemical performance of LAB have been discussed. The literature on the deterioration in the battery capacity and cyclability due to operation in ambient environment and degradation of lithium anode due to exothermic reaction between lithium and water is reviewed and explained. The effects of using oxygen-selective membrane (OSM) to block moisture and $${\mathrm{CO}}_{2}$$ CO 2 contamination has also been discussed, along with suitable materials that can act as OSM. It is concluded that the utilization of OSM can not only make the safer operation of LAB in ambient air but could also enhance the electrochemical performance of LAB. Future direction of the research work required to address the associated challenges is also provided.

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Section: Future Directionmentioning

confidence: 99%

Aprotic lithium air batteries with oxygen-selective membranes

Uzair

Zahoor

Shaikh

et al. 2022

Mater Renew Sustain Energy

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“…Researchers observed that blending PVDF with PMMA led to the transfer of crystallization from α phase to β phase, which is thermodynamically unstable in the pure form of PVDF [30,37,38]. Polymeric blend nanocomposites made from incorporating PVDF/PMMA blends with nanoparticles also are other materials with enhanced properties [39,40]. Unique properties of rGO, such as extraordinary mechanical, thermal, and optical properties and good dispersion in polar solvents, make it a good choice to apply as an effective filler for the production of PVDF, PMMA, and PVDF/PMMA blends [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Decorated in In Situ Reduced Graphene Oxide Nanohybrids Improved Properties in Poly(vinylidene fluoride)/Poly(methyl methacrylate) Blends

Khorramshokouh,

Ramezani,

Sahami

et al. 2024

International Journal of Polymer Science

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In this paper, reduced graphene oxide decorated with silver nanoparticle (rGO-Ag) nanohybrids were prepared using an environmentally friendly approach and incorporated as reinforcement in poly(vinylidene fluoride)-poly(methyl methacrylate) blends via a melt mixing process. The microstructure of rGO-Ag nanohybrids and its effect on the microstructure, mechanical, thermal, and electrical properties of the PVDF/PMM/rGO-Ag was studied using Fourier transform infrared (FTIR), Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile, thermogravimetric analysis (TGA), and impedance spectroscopy methods. FTIR and TEM analysis confirmed that rGO-Ag successfully synthesized and Ag nanoparticles are located on the rGO surface. The tensile analysis demonstrated that incorporating 1 wt.% of rGO-Ag in PVDF/PMMA blend increases Young’s modulus and strength of nanocomposite up to 31% and 35%, respectively. The Halpin-Tsai model was also used for PVDF/PMMA/rGO-Ag nanocomposites, and the results confirmed that this model works well to predict the tensile modulus. Impedance spectroscopy analysis showed that the presence of rGO-Ag nanohybrids in PVDF/PMMA blend effectively enhanced the conductivity of PVDF/PMMA blend. TGA results demonstrated that the presence of rGO-Ag nanohybrids enhanced the thermal stability of nanocomposites and increased the degradation temperature of PVDF/PMMA/rGO-Ag nanocomposites in the range of 20°C compared to PVDF/PMMA blend.

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“…Studies also showed that the blending of PVDF with PMMA results in a transfer in crystallization from α phase to β phase which is thermodynamically unstable in the pure form of PVDF [7,16,17]. Another method to improve the properties of polymers is to add llers to their matrix, hence, there is much interest in the investigation of various combinations of polymers and llers [18,19]. It has been reported that by the addition of small amounts of nanohybrids to polymer matrices a signi cant improvement in their physical properties was observed.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Decorated Graphene Filled PVDF/PMMA Blends with Advanced electrical, mechanical, and thermal properties

Khorramshokouh¹,

Ramezani²,

Sahami³

et al. 2022

Preprint

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In this paper, silver nanoparticles decorated reduced graphene oxide (rGO-Ag) nanohybrids were prepared using an environmentally-friendly approach and incorporated as reinforcement in poly(vinylidene fluoride)-poly(methyl methacrylate) blends via melt mixing process. The effect of rGO-Ag nanohybrids was studied on various properties of the blends using different characterization methods. Fourier transform infrared (FTIR), X-ray diffraction (XRD), and transmission electron microscopy (TEM) results confirmed the successful synthesis of rGO-Ag nanohybrids. The mechanical, electrical, and thermal properties of the resulting rGO-Ag filled nanocomposites were investigated using tensile, thermogravimetric analysis (TGA), and impedance spectroscopy methods. The Halpin-Tsai model also adjusted for PVDF/PMMA/rGO-Ag composites and the results confirmed that this model works well for the prediction of the tensile modulus. Investigation of mechanical properties demonstrated that the presence of rGO-Ag nanohybrids increased the yield strength and elastic modulus of the samples with the addition of only 1 wt % to the chosen blend sample. Impedance spectroscopy test results showed that the addition of rGO-Ag nanohybrids to PVDF/PMMA blend can effectively enhance the conductivity of the blends. Finally, TGA results demonstrated that the addition of rGO-Ag nanohybrids affected the thermal behavior of the samples and increased the thermal stability and degradation temperature of the resulting nanocomposites compared to the base PVDF/PMMA blend.

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Impedance characteristics analysis of rGO/polymers (PVDF, PMMA, PTFE) nanocomposite membranes

Cited by 8 publications

References 12 publications

Aprotic lithium air batteries with oxygen-selective membranes

Aprotic lithium air batteries with oxygen-selective membranes

Silver Nanoparticles Decorated in In Situ Reduced Graphene Oxide Nanohybrids Improved Properties in Poly(vinylidene fluoride)/Poly(methyl methacrylate) Blends

Silver Nanoparticles Decorated Graphene Filled PVDF/PMMA Blends with Advanced electrical, mechanical, and thermal properties

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