Electrical and Magnetic Properties of Polymer Electrolyte (PVA:LiOH) Containing In Situ Dispersed Fe3O4 Nanoparticles

Nanocomposite magnetic polymer electrolytes based on poly(vinyl alcohol) (PVA) complexed with lithium hydroxide (LiOH) and containing magnetite (Fe3O4) nanoparticles were prepared using an in situ method, in which the nanoparticles were grown in the host polymer electrolyte. Ion carriers were formed during nanoparticle growth from the previously added LiOH precursor. If a high concentration of LiOH was added, the remaining unreacted LiOH was distributed in the form of an amorphous complex around the Fe3O4 nanoparticles, thus preventing agglomeration of the nanoparticles by the host polymer. By addition of Fe3O4 the composite polymer electrolytes improved the ionic conductivity, resulting in a maximum conductivity of 1.81×10-3 S⋅cm-1. The magnetic properties of the polymer electrolyte were investigated through magnetic susceptibility studies, and the material was predominantly ferromagnetic.

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Structural, electrical, and magnetic properties of polypyrrole–Zn0.5Ni0.45Mn0.05Fe2O4 nanocomposites prepared by in situ chemical polymerization

Polymer Science Series B ◽

10.1134/s1560090415060044 ◽

2015 ◽

Vol 57 (6) ◽

pp. 738-749 ◽

Cited By ~ 4

Author(s):

Asmat Elahi ◽

N. A. Niaz ◽

M. S. Awan ◽

Abdul Shakoor ◽

Khalid Mahmood ◽

...

Keyword(s):

Magnetic Properties ◽

Chemical Polymerization ◽

Electrical And Magnetic Properties

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Enhanced supercapacitive performances of functionalized activated carbon in novel gel polymer electrolytes with ionic liquid redox-mediated poly(vinyl alcohol)/phosphoric acid

RSC Advances ◽

10.1039/c6ra15070e ◽

2016 ◽

Vol 6 (79) ◽

pp. 75376-75383 ◽

Cited By ~ 25

Author(s):

Hyun Seok Jang ◽

C. Justin Raj ◽

Won-Gil Lee ◽

Byung Chul Kim ◽

Kook Hyun Yu

Keyword(s):

Ionic Liquid ◽

Activated Carbon ◽

Phosphoric Acid ◽

Polymer Electrolyte ◽

Polymer Electrolytes ◽

Vinyl Alcohol ◽

Gel Polymer Electrolyte ◽

Poly Vinyl Alcohol ◽

Gel Polymer Electrolytes ◽

Carbon Supercapacitors

Functionalized activated carbon supercapacitors were fabricated using [EMIM]BF4 mediated PVA/H3PO4 gel polymer electrolytes. The ionic-liquid [EMIM]BF4 addition in PVA/H3PO4 gel polymer electrolyte demonstrated excellent supercapacitor performances.

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Effect of Pretreatment on Magnetic Nanoparticle Growth on Graphene Surface and Magnetic Performance in Electroless Plating

Journal of Nanomaterials ◽

10.1155/2019/5602742 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Kyunbae Lee ◽

Taehoon Kim ◽

Sang Bok Lee ◽

Byung Mun Jung

Keyword(s):

Magnetic Material ◽

Magnetic Properties ◽

Saturation Magnetization ◽

Electroless Plating ◽

Magnetic Nanoparticle ◽

High Concentration ◽

Graphene Surface ◽

Future Studies ◽

Nanoparticle Growth ◽

Magnetic Performance

Electroless plating involves sensitization, activation, and plating processes. Sensitization and activation are conducted by dipping the substrate in SnCl2 solution and PdCl2 solution, respectively. These pretreatment processes are required to plate the substrate with noncatalytic surfaces. We investigated the effect of sensitization on the magnetic properties of FeCoNi@graphene hybrids prepared via electroless plating. The solution concentrations during sensitization were varied to observe changes in the structural, morphological, and magnetic properties of FeCoNi@graphene using XRD, TEM, and VSM, respectively. Sensitization under high concentration produced a large amount of SnO2, resulting in low saturation magnetization. Further, the FeCoNi@graphene hybrid prepared via electroless plating without sensitization also exhibited low saturation magnetization owing to the formation of oxides and hydroxides. We prepared FeCoNi@graphene with a saturation magnetization of 40.8 emu/g under sensitization at low concentration; this is the highest saturation magnetization among the reported magnetic material@graphene hybrids prepared via electroless plating. This study provides guidelines for the pretreatment of graphene via electroless plating and should contribute to future studies on the synthesis of magnetic material@graphene hybrids.

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Proton conducting polymer electrolytes based on PVdF-PVA with NH4NO3

Journal of Polymer Engineering ◽

10.1515/polyeng-2012-0146 ◽

2013 ◽

Vol 33 (4) ◽

pp. 315-322 ◽

Cited By ~ 4

Author(s):

Muthuvinayagam Muthiah ◽

Gopinathan Chellasamy ◽

Rajeswari Natarajan ◽

Selvasekarapandian Subramanian ◽

Sanjeeviraja Chinnappa

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolyte ◽

Conducting Polymer ◽

Polymer Blend ◽

Polymer Electrolytes ◽

Vinylidene Fluoride ◽

Xrd Analysis ◽

Dielectric Behavior ◽

Poly Vinyl Alcohol ◽

Casting Technique

Abstract Conducting polymer electrolyte films were prepared based on poly (vinylidene fluoride) (PVdF) and poly (vinyl alcohol) (PVA) by using a solution casting technique. The optimized PVdF-PVA polymer blend ratio was doped with different concentrations of NH4NO3 and polymer blend electrolytes were prepared. The increase in amorphous nature of the polymer electrolytes was confirmed by X-ray diffraction (XRD) analysis and optical microscopic studies. The complex formation between the polymers and the salt was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The ac impedance studies were performed to evaluate the ionic conductivity of the polymer electrolyte membranes in the range 303–333 K and the highest ionic conductivity was found to be 2.91×10-4 S/cm at ambient temperature for PVdF-PVA-NH4NO3 (80:20:25 MWt%) polymer electrolyte, with activation energy Ea=0.7 eV. The dielectric behavior of the electrolytes was also studied.

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A facile in situ approach to ion gel based polymer electrolytes for flexible lithium batteries

RSC Advances ◽

10.1039/c7ra10268b ◽

2017 ◽

Vol 7 (86) ◽

pp. 54391-54398 ◽

Cited By ~ 7

Author(s):

Bingyu Huang ◽

Youdi Zhang ◽

Mingming Que ◽

Yingbo Xiao ◽

Yaoquan Jiang ◽

...

Keyword(s):

Electrochemical Performance ◽

Polymer Electrolyte ◽

Lithium Batteries ◽

Polymer Electrolytes ◽

Low Cost ◽

Synthesis Strategy ◽

Ion Gel

A simple, effective and low-cost in situ synthesis strategy was developed to produce cross-linked ion gel based polymer electrolyte for flexible lithium-based batteries with highly improved electrochemical performance and safety.

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Investigating SMART Membranes and Coatings by In Situ Synthesis of Iron Oxide Nanoparticles in PVA Hydrogels

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.60.32 ◽

2008 ◽

Vol 60 ◽

pp. 32-37 ◽

Cited By ~ 1

Author(s):

George K. Stylios ◽

Tao Yu Wan

Keyword(s):

Magnetic Properties ◽

Iron Oxide ◽

Iron Oxide Nanoparticles ◽

Vinyl Alcohol ◽

Calcium Alginate ◽

Poly Vinyl Alcohol ◽

Oxide Nanoparticles ◽

Particle Nucleation ◽

Iron Oxide Particles

This paper reports a novel method of developing SMART nanocomposite membranes and coatings by in situ synthesis of iron oxide particles in a Poly(vinyl alcohol) (PVA)matrix, using co-precipitation of different amounts of Fe(II) and Fe(III) taken in an alkaline medium. Poly(vinyl alcohol) was used to encapsulate iron oxide nanoparticles, as scaffold for particle nucleation and its influence on particle size and on magnetic properties were studied. The ferrogels were prepared by a freeze/thawing process of the solutions containing magnetite nanoparticles. Magnetite particles with an average diameter of 20-40 nm were obtained homogeneously within the matrix because of the tridimensional structure and chelating capacities of PVA. Calcium-alginate PVA gel was used to encapsulate the iron oxide/PVA nanocomposite. The mechanical properties and the saturation magnetization of the system were measured. The combination of magnetic properties of iron nanoparticles with the biocompatibility of calcium-alginate suggests that these materials have great potential for use as controlled delivery systems activated externally by magnetic stimuli.

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Compatible Solid Polymer Electrolyte Based on Methyl Cellulose for Energy Storage Application: Structural, Electrical, and Electrochemical Properties

Polymers ◽

10.3390/polym12102257 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2257 ◽

Cited By ~ 4

Author(s):

Shujahadeen B. Aziz ◽

Iver Brevik ◽

Muhamad H. Hamsan ◽

M. A. Brza ◽

Muaffaq M. Nofal ◽

...

Keyword(s):

Energy Storage ◽

Polymer Electrolyte ◽

Polymer Electrolytes ◽

Methyl Cellulose ◽

Linear Sweep Voltammetry ◽

Transference Number ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

High Concentration ◽

Green Polymer

Compatible green polymer electrolytes based on methyl cellulose (MC) were prepared for energy storage electrochemical double-layer capacitor (EDLC) application. X-ray diffraction (XRD) was conducted for structural investigation. The reduction in the intensity of crystalline peaks of MC upon the addition of sodium iodide (NaI) salt discloses the growth of the amorphous area in solid polymer electrolytes (SPEs). Impedance plots show that the uppermost conducting electrolyte had a smaller bulk resistance. The highest attained direct current DC conductivity was 3.01 × 10−3 S/cm for the sample integrated with 50 wt.% of NaI. The dielectric analysis suggests that samples in this study showed non-Debye behavior. The electron transference number was found to be lower than the ion transference number, thus it can be concluded that ions are the primary charge carriers in the MC–NaI system. The addition of a relatively high concentration of salt into the MC matrix changed the ion transfer number from 0.75 to 0.93. From linear sweep voltammetry (LSV), the green polymer electrolyte in this work was actually stable up to 1.7 V. The consequence of the cyclic voltammetry (CV) plot suggests that the nature of charge storage at the electrode–electrolyte interfaces is a non-Faradaic process and specific capacitance is subjective by scan rates. The relatively high capacitance of 94.7 F/g at a sweep rate of 10 mV/s was achieved for EDLC assembly containing a MC–NaI system.

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Characterizations of PMMA-based polymer electrolyte membranes with Al2O3

Journal of Polymer Engineering ◽

10.1515/polyeng-2019-0088 ◽

2019 ◽

Vol 39 (7) ◽

pp. 612-619 ◽

Cited By ~ 1

Author(s):

Cha Chee Sun ◽

Ah Heng You ◽

Lay Lian Teo

Keyword(s):

Particle Size ◽

Ionic Conductivity ◽

Polymer Electrolyte ◽

Polymer Electrolytes ◽

Polymer Electrolyte Membranes ◽

Average Particle ◽

Cole Plot ◽

Electrolyte Membranes ◽

Nano Size ◽

Host Polymer

Abstract Poly(methyl methacrylate) (PMMA)-based polymer electrolyte membranes are prepared through the solution cast method, with PMMA:ethylene carbonate (EC):LiCF3SO3:Al2O3 weight ratio of 55.13:18.34:24.5:2. The effect of Al2O3 filler grain sizes of 50 nm and 10 μm on the polymer electrolytes was studied in this work. From the Cole-Cole plot obtained through electrochemical impedance spectroscopy, the highest ionic conductivity for 50-nm Al2O3 in the PMMA-LiCF3SO3-EC-Al2O3 sample was measured as 1.52 × 10−4 S/cm at room temperature. The bonding formation among the host polymer and other additives in the polymer electrolytes has been studied using Fourier transform infrared spectroscopy. A strong occurrence of CH3 stretching mode has proven that nano size Al2O3 results in a much stronger bonding effect with the host polymer. The particle sizes were calculated by applying the Debye-Scherrer equation from the X-ray diffraction results. This work considers the effect of instrument broadening to further improve the accuracy of particle broadening for particle size calculation. The average particle size of nano size Al2O3 in the PMMA sample is calculated as 2.9693 nm. Moreover, a higher amorphousity level obtained from nano size filler polymer electrolyte of 98.5% computed from differential scanning calorimetry thermograms had also explained the achievement of high ionic conductivity in this work.

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