Conductivity enhancement in SiO 2 doped PVA:PVDF nanocomposite polymer electrolyte by gamma ray irradiation

Hema, M.; Tamilselvi, P.; Pandaram, P.

doi:10.1016/j.nimb.2017.04.074

Cited by 21 publications

(8 citation statements)

References 24 publications

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“…It is observed that some achievements have been obtained by the addition of ceramic particle. Hema et al [ 21 ] prepared and characterized an ASPE based on PVA-PVDF-SiO 2 whose ionic conductivity achieved 9.4 × 10 −4 S·cm −1 . More et al [ 22 ] reported PVA-Al 2 O 3 electrolyte membrane, which had an ionic conductivity of 3.2 × 10 −4 S·cm −1 as the weight ratio was 10:1 (PVA:Al 2 O 3 ), and the mechanical strength was also improved.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of PVA Alkaline Solid Polymer Electrolyte with Addition of Bamboo Charcoal

et al. 2018

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Natural bamboo charcoal (BC) powder has been developed as a novel filler in order to further improve performances of the polyvinyl alcohol (PVA)-based alkaline solid polymer electrolyte (ASPE) by solution casting method. X-ray diffraction patterns of composite polymer electrolyte with BC revealed the decrease in the degree of crystallinity with increasing content of BC. Scanning electron microscopy images showed pores on a micrometer scale (average diameter about 2 μm) distributed inside and on the surface of the membranes, indicating a three-dimension network formed in the polymer framework. The ionic conductivity was measured by the alternating-current (AC) impedance method, and the highest conductivity value of 6.63 × 10−2 S·cm−1 was obtained with 16 wt % of BC content and mKOH:mPVA = 2:1.5 at 30 °C. The contents of BC and KOH could significantly influence the conductivity. The temperature dependence of the bulk electrical conductivity displayed a combination of Arrhenius nature, and the activation energy for the ion in polymer electrolyte has been calculated. The electrochemical stability window of the electrolyte membrane was over 1.6 V. The thermogravimetric analysis curves showed that the degradation temperatures of PVA-BC-KOH ASPE membranes shifted toward higher with adding BC. A simple nickel-hydrogen battery containing PVA-BC-KOH electrolyte membrane was assembled with a maximum discharge capacity of 193 mAh·g−1.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of PVA Alkaline Solid Polymer Electrolyte with Addition of Bamboo Charcoal

et al. 2018

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“…where, δ is the ionic conductivity, A is a pre‐exponential factor proportional to the number of charge transporters, E a is the activation energy, T is the absolute temperature at which the experiments performed and T 0 is the Vogel temperature . A nice fitting of Li‐ion conductivity to VTF equation suggest the dependence of ionic conductivity with segmental motion of amorphous part of PEO in the resulting NCPE as well as ions hoping in the composite due to increased chain flexibility at higher temperature .…”

Section: Resultsmentioning

confidence: 90%

“…Moreover, presence of silica may create more free volume in the composite which facilitates easy segmental motion of PEO chain at higher temperature and thus, increasing trend of conductivity with temperature. This is because rise in temperature provide more free volume in NCPEs that helps in easy flow of ions within NCPEs that finally leads to higher ionic conductivity ,. Thus, the Arrhenius behavior of conductivity below T m may be attributed to the hindered mobility of amorphous PEO segments confined within the crystalline regions, whereas VTF behavior above T m suggest the melting of crystalline phase of PEO resulting in higher segmental mobility.…”

Section: Resultsmentioning

confidence: 98%

Nanostructure PEO‐Silica Hybrids: A New Class of Additive Material for Composite Polymer Electrolytes

et al. 2017

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Hybrid nanostructure polyethylene oxide (PEO)‐silica hybrids (PSH) prepared by sol‐gel chemistry are utilized as novel nanofiller to fabricate PEO‐based nanocomposite polymer elecytrolytes (NCPEs) by adopting the conventional solvent casting approach. The resulting PSH hybrids are characterized by various techniques followed by their incorporation into NCPEs that result in enhancement in the Li‐ion conductivity and a maximum ionic conductivity of 7.20 × 10−5 S cm−1 is achieved with only 0.25% nanofillers. The temperature dependence conductivity study shows a linear behavior below melting temperature following the Arrhenius equation and shows non‐linear behavior above the melting temperature following the Vogel–Taumann–Fulcher (VTF) equation. Argand plots of various NCPEs both at room temperature and elevated temperature signify the role of various relaxation processes for such type of conducting behavior, which is further supported by dielectric and tangential loss studies. Moreover, X‐ray diffraction and Differential Scanning Calorimetry measurements are carried out to understand the change in polymer crystallinity in the resulting NCPEs and are well in accordance with the conductivity changes.

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“… PVA – Mg(Tf) 2 -EMITf 2.1 × 10 −4 Mg ion battery [34] 3. PVA – Poly vinylidene Fluoride -LiCF 3 SO 3 -SiO 2 9.4 × 10 −4 Characterization only [35] 4. PVA – Poly vinylidene Fluoride -LiCF 3 SO 3 2.7× 10 −3 Characterization only [36] 5.…”

Section: Main Textmentioning

confidence: 99%

“…Thus, it is noticed that irrespective of the types of electrolyte, PVA based electrolytes are extensively studied for the fabrication of various electrochemical and energy storage devices [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ].…”

Section: Main Textmentioning

confidence: 99%

Effect of incorporation of different plasticizers on structural and ion transport properties of PVA-LiClO4 based electrolytes

Hirankumar¹,

Mehta

2018

Heliyon

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To date high ionic conducting polymer electrolytes are of great interest because of their potential applications in various electrochemical devices such as batteries, fuel cells, solar cells and super capacitors etc., as electrolytes. Ion conduction through polymer electrolytes can occur mostly in amorphous environment exists above their glass transition temperature (Tg). In order to improve ionic conductivity, many approaches such as addition of plasticizer, blending of polymers, nano composite have been employed. This paper reviews the influence of different plasticizers/additives on the ion transport mechanism of Poly(vinyl alcohol) (PVA)-LiClO4 polymer electrolytes since poly vinyl alcohol is a semi crystalline, synthetic biodegradable polymer and lithium perchlorate is one of the most moisture resistant lithium salts. This review also reveals the relation between dynamical disorder in polymer electrolyte with ionic conductivity.

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Conductivity enhancement in SiO 2 doped PVA:PVDF nanocomposite polymer electrolyte by gamma ray irradiation

Cited by 21 publications

References 24 publications

Preparation and Characterization of PVA Alkaline Solid Polymer Electrolyte with Addition of Bamboo Charcoal

Preparation and Characterization of PVA Alkaline Solid Polymer Electrolyte with Addition of Bamboo Charcoal

Nanostructure PEO‐Silica Hybrids: A New Class of Additive Material for Composite Polymer Electrolytes

Effect of incorporation of different plasticizers on structural and ion transport properties of PVA-LiClO4 based electrolytes

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