Dielectric studies and AC conductivity of PVDF-HFP: LiBF4: EC plasticized polymer electrolytes

Sangeetha, M.; Mallikarjun, A.; Aparna, Y.; Reddy, M. Vikranth; Kumar, J. Siva; Sreekanth, T.; Reddy, M. Jaipal

doi:10.1016/j.matpr.2020.12.280

Cited by 20 publications

(10 citation statements)

References 31 publications

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“…In addition, the increase in  values for NCPs containing IL treated BaTiO3 when compared with those untreated Figure ( 6) is attributed to the presence of the low molecular weight ionic liquid which is characterized by its high . This ionic liquid physically interacts with PVA and the result is decrease in the viscosity and consequently forms higher number of charge carriers [39]. Figure (9) shows also the variation of  versus the frequency.…”

Section: Dielectric Measurementsmentioning

confidence: 95%

“… measures the energy stored while  is a measure of energy dissipated due to molecular collisions as the composite dipoles do work and lag for aligning themselves parallel to the applied electric field [27]. At low frequency, it is notable that both  and  are high, this is because of the charge polarization close to the electrodeelectrolyte border due to the free mobile charges in the back bone of PVA [28][29][30]. The increase in  with increasing BaTiO3 loading is related to the fact that microcapacitors are constructed by particles near to each other and ultra-thin PVA separated in the centre under electric field [31][32][33].…”

Section: Dielectric Measurementsmentioning

confidence: 99%

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High -k Green Polymer Nano composites Based on Polyvinyl Alcohol for Electrostatic Dissipation Applications

et al. 2022

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Polyvinyl alcohol (PVA) as a green biodegradable polymeric matrix was chosen to fabricate high-k (high permittivity) polymer nanocomposites with good magnetic and electric properties to be used for electrostatic dissipation applications. PVA was doped with different concentration of magnetite (Fe3O4) nanoparticles and barium titanate (BaTiO3) nanoparticles before and after treatment with ionic liquid (IL). The magnetic properties were investigated by vibrating sample magnetometer (VSM) and the obtained results revealed an improvement in such properties by the ionic liquid treatment of BaTiO3. This finding widens the application scope of PVA nanocomposites to include electromagnetic purposes. Moreover, electrical properties including permittivity , dielectric loss  in addition to electrical conductivity  were also studied. The dielectric properties were also enhanced after ionic liquid treatment. In addition, the values of conductivity  was in the order ~ 10 -7 S/cm which endorse using such nanocomposites for electrostatic dissipation applications.

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Section: Dielectric Measurementsmentioning

confidence: 95%

Section: Dielectric Measurementsmentioning

confidence: 99%

High -k Green Polymer Nano composites Based on Polyvinyl Alcohol for Electrostatic Dissipation Applications

et al. 2022

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“…The study of dielectric constant, εr can be used to measure stored charge in SBE where the ions act as charge carriers [17]. Equation (2) was used to calculate εr, where C0 = (εoA)/t and ω = 2πf.…”

Section: Dielectric Analysismentioning

confidence: 99%

“…However, the CMC-AA SBE system reported by can be further improved. There are numerous reports on improving polymer electrolyte conductivity by using plasticization technique [16][17][18]. Plasticizing the polymer-salt complex was said to improve the ionic conductivity by improving salt dissociation into free cations and anions and creating new pathways for ion migration [17].…”

Section: Introductionmentioning

confidence: 99%

Improving Ionic Conductivity of Carboxymethyl Cellulose Solid Biopolymer Electrolyte with Assist from Dimethyl Carbonate

2022

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Ionic conductivity is one of the important properties for an electrolyte to be considered before it can used as practical application in energy storage. Therefore, this study aims to improve the ionic conductivity of solid biopolymer electrolyte (SBE) based on carboxymethyl cellulose (CMC) doped with ammonium acetate (AA) by incorporating plasticizer, namely, dimethyl carbonate (DMC). The SBEs were prepared using solution casting technique. Fourier Transform Infrared (FTIR) was used to ascertain the complexation among CMC, AA and DMC. From FTIR analysis, DMC is believed to have created new pathways for ionic conduction. The electrical properties of SBEs were investigated using Electrical Impedance Spectroscopy (EIS). The highest conducting value achieved for the plasticized system was 4.27×10-5 S cm-1 for sample containing 10 wt% DMC. Dielectric analysis revealed that frequency and plasticizer content affect the dielectric constant value. By employing Transference Number Measurement (TNM), the charge transport in the SBE system proved to be predominantly ions where DMC 10 has the highest tion (0.95). Overall, addition of 10 wt% of DMC has the best electrical properties. HIGHLIGHTS Solid electrolyte is the answer to problems faced by liquid electrolyte, and it can be made by using biopolymer-based materials to form Solid biopolymer electrolyte (SBE) The SBE in this report was prepared successfully using the simplest and cheapest technique (solution casting technique). The SBE prepared possesses good mechanical properties (free standing, flexible and robust) High ionic conductivity and high ionic transference value (tion) is beneficial in electrochemical application and was investigated in this report and found to corelated with each other GRAPHICAL ABSTRACT

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“…In addition, polymer electrolytes with a high Young's modulus can effectively prevent the formation of lithium dendrites, thus improving the cycling stability of lithium metal. Polymer matrix materials mainly include polyvinylidene fluoride (PVDF), 20,[29][30][31] polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), [32][33][34][35] polymethyl methacrylate (PMMA), [35][36][37][38] polyethylene oxide (PEO), 23,27,39,40 aliphatic polycarbonate (APC), 21 etc. However, the ionic conductivity of the above polymer electrolytes at room temperature is low (about 10 −7 S cm −1 ).…”

Section: Introductionmentioning

confidence: 99%

A novel polymer electrolyte with in situ polymerization and a high concentration of lithium salts for lithium metal batteries

Wang

Liu

et al. 2023

Polym. Chem.

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Dielectric studies and AC conductivity of PVDF-HFP: LiBF4: EC plasticized polymer electrolytes

Cited by 20 publications

References 31 publications

High -k Green Polymer Nano composites Based on Polyvinyl Alcohol for Electrostatic Dissipation Applications

High -k Green Polymer Nano composites Based on Polyvinyl Alcohol for Electrostatic Dissipation Applications

Improving Ionic Conductivity of Carboxymethyl Cellulose Solid Biopolymer Electrolyte with Assist from Dimethyl Carbonate

A novel polymer electrolyte with in situ polymerization and a high concentration of lithium salts for lithium metal batteries

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