Porous Nanocomposite Polymer Electrolyte Prepared by a Non-Solvent Induced Phase Separation Process

Highly proton-conducting hybrid materials (P 2 W 17 V/PEG and P 2 W 17 V/PEG/SiO 2 ) were prepared by heptadecatungstovanadodiphosphoric heteropoly acid with Dawson structure (P 2 W 17 V, 90 wt.%), polyethylene glycol (PEG, 10 wt.% and 5 wt.%) and silica gel (SiO 2 , 0 wt.% and 5 wt.%). The products were characterized by the infrared (IR) spectrum, X-ray powder diffraction (XRD) analysis and electrochemical impedance spectrum (EIS). The result reveals that their conductivity values are 1:02 Â 10 À2 and 2:58 Â 10 À2 S Á cm À1 at room temperature (26 ○ C) and 75% relative humidity (RH), respectively. Their conductivities increase with higher temperature and these activation energies of proton conduction are 9.51 and 14:95 kJ Á mol À1 , which are lower than that of pure heteropoly acid (32:23 kJ Á mol À1 ). These mechanisms of proton conduction for these two materials are Grotthuss mechanism.

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“…14 The conductivity is measured as a fundamental property of the hybrid material. 15,16 The conductivity is calculated as…”

Section: (I) Preparation Of Hybrid Materialsmentioning

confidence: 99%

Preparation and Electrochemical Performance of Hybrid Materials Containing Heteropoly Acid With Dawson Structure and Polymers

Tong

Zhou

et al. 2012

Funct. Mater. Lett.

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“…Nanoparticles were widely used in solid polymer electrolytes; now they used to be added to gel electro lytes too, in particular, TiO 2 [7][8][9], SiO 2 [10,11], ZrO 2 [12], CeO 2 [13], Li 3 N [14], AlO(OH) n [15,16], clay [17][18][19] etc.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite network polymer gel-electrolytes: TiO2- and Li2TiO3-nanoparticle effects on their structure and properties

Yarmolenko

Yudina

Marinin³

et al. 2015

Russ J Electrochem

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The effects of TiO 2 (~60 nm) and Li 2 TiO 3 (~20 nm) nanoparticles on the conductivity, struc ture, and mechanical strength of (polyether diacrylate-LiClO 4 -ethylene carbonate) based polymer gel electrolytes are studied. When the gel electrolytes are synthesized with the TiO 2 and Li 2 TiO 3 nanoparticles ultrasonic pretreatment, both polyether diacrylate and ethylene carbonate are partially decomposed in the solution; this is evidenced by the appearance of -CH 3 group signal at 1.2 ppm in 1 H NMR spectra, as well, as by the peak area analysis. The gel electrolyte matrix partial decomposition was shown not to affect the net work polymer electrolyte conductivity and mechanical properties. Analysis of NMR spectra for 7 Li nuclei, taken with nanocomposite polymer electrolyte rotating under magic angle, revealed two Li + ion environ ments: with the nanoparticles and the polymer matrix. Upon the adding of TiO 2 nanoparticles (10 mass %) the polymer electrolyte conductivity increased by order of magnitude (up to 1.8 × 10 -3 S/cm at 20°C); upon the adding of Li 2 TiO 3 , by a factor of 2 only (up to 7.0 × 10 -4 S/cm at 20°C). The electrolyte solution ultra sonic treatment increased the films' mechanical strength; the larger effect occurred with Li 2 TiO 3 (the mod ulus of elasticity is 15 MPa).

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“…However, P(VdF-co-HFP) has superior properties over PVdF due to the presence of additional amorphous HFP part which reduces the crystallinity thereby leading to higher ionic conductivity [6]. P(VdF-co-HFP) has high dielectric constant (e % 8.4), which is a direct measure of solvating ability of polymers [7], excellent electrochemical stability and affinity to electrolyte due to the presence of highly electronegative fluoride atom in its back bone structure [8].…”

Section: Introductionmentioning

confidence: 99%

“…Both the gelled phase and ionic conductivity of PGEs increase with increasing amount of absorbed liquid electrolyte which greatly depends on porosity and pore structure of the membrane. But ionic conductivity and mechanical stability of PGEs are mutually exclusive [7]. Leakage of organic solvents from PGEs leading to decrease in ionic conductivity and electrochemical properties on prolonged usage and high crystallinity of the polymer membranes are major issues that limit their use in LIBs.…”

Section: Introductionmentioning

confidence: 99%

Dual phase polymer gel electrolyte based on non-woven poly(vinylidenefluoride-co-hexafluoropropylene)–layered clay nanocomposite fibrous membranes for lithium ion batteries

Shubha

Raghavan

Hng

et al. 2013

Materials Research Bulletin

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Porous Nanocomposite Polymer Electrolyte Prepared by a Non-Solvent Induced Phase Separation Process

Cited by 20 publications

References 20 publications

Preparation and Electrochemical Performance of Hybrid Materials Containing Heteropoly Acid With Dawson Structure and Polymers

Preparation and Electrochemical Performance of Hybrid Materials Containing Heteropoly Acid With Dawson Structure and Polymers

Nanocomposite network polymer gel-electrolytes: TiO2- and Li2TiO3-nanoparticle effects on their structure and properties

Dual phase polymer gel electrolyte based on non-woven poly(vinylidenefluoride-co-hexafluoropropylene)–layered clay nanocomposite fibrous membranes for lithium ion batteries

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