scholarly journals Effect of TiO2 Nano-filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

2021 ◽  
Author(s):  
Kiran Kumar Ganta ◽  
Venkata Ramana Jeedi ◽  
K. Vijaya Kumar ◽  
Yalla Mallaiah ◽  
E. Laxmi Narsaiah
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Power Law ◽  
Ac Conductivity ◽  
Vinylidene Fluoride ◽  
Electrochemical Impedance ◽  
Sodium Perchlorate ◽  
Filler Concentration ◽  
Transport Numbers ◽  
Ion Conducting

Abstract Nanocomposite Polymer Electrolyte (NCPE) films based on a blend of two polymers poly (ethylene oxide) (PEO) and poly (vinylidene fluoride) (PVDF) complexed with sodium perchlorate (NaClO4) salt and Nano-filler Titanium dioxide (TiO2) (i.e., (80wt%PEO/20wt%PVDF) + 7.5wt%NaClO4+ xwt%TiO2 where x = 3, 6, 9, 12, 15, and 18) were prepared and characterized as potential candidates for battery applications. Electrochemical Impedance Spectroscopy (EIS) has been employed between the frequencies 10 Hz and 4 MHz to investigate electrical, dielectric and electric modulus properties of the prepared NCPE films. Effect of TiO2 Nano-filler concentration on the structural, ionic conductivity, and dielectric relaxation has been studied. The AC conductivity of the NCPE films at high frequencies obeys Jonscher’s power law. The values of DC ionic conductivity calculated by fitting the AC conductivity spectra to the best fit of Joncher’s power law are consistent with the values of DC ionic conductivity calculated from the bulk resistance (Rb) of the NCPE films. The ionic conductivity that depends on temperature follows the Arrhenius rule between the temperatures 298 K and 328 K. The maximum ionic conductivity at ambient temperature 8.75x10-5 S/cm was obtained for (80wt%PEO/20wt%PVDF) +7.5wt%NaClO4 +15wt%TiO2 NCPE film and it is attributed to the decrease in crystallinity. Using Wagner’s polarization technique ionic transport numbers of various NCPE films were measured.

Poly(vinylidenefluoride-co-hexafluoropropylene): An Emerging Host Material for Ion Conducting Gel Polymer Electrolyte-Cum-Separator Membrane

2020 ◽  
Vol 12 (1) ◽  
pp. 50-59
Author(s):  
Shivani Gupta ◽  
Sarvesh Kumar Gupta ◽  
B. K. Pandey ◽  
A. K. Gupta
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Rational Design ◽  
Vinylidene Fluoride ◽  
Storage System ◽  
Gel Polymer Electrolyte ◽  
Rechargeable Batteries ◽  
Safety Issues ◽  
Ion Conducting ◽  
High Dielectric

Secondary batteries based on ion conduction are among the most promising technology for next generation mobile and stationary storage system due to their unmatched volumetric energy density. However the multiple emerging challenges which include electrochemical stability, transport efficiency and safety issues of these secondary batteries have attracted worldwide attention. The perspective of this review is that rational design of polymeric separator which is an essential component in rechargeable batteries separating anode and cathode, and controlling number of mobile ions is crucial to overall battery performance, including lifetime, safety as well as energy and power density of battery. There is impressive progress in the exploration of separator materials. Among them, poly(vinylidene fluoride-co-hexafluoropropylene) P(VdF-co-HFP) have received great attention as polymer host due to some its splendid collective property such as its amorphous nature, high room temperature ionic conductivity, high dielectric constant and the possibility of controlling the porosity of the materials through binary and ternary polymer/solvent systems. This review focuses specifically on recent advances in P(VdF-co-HFP) based separator cum gel polymer electrolyte with detailed analysis of several embedded functional agent that are incorporated to improve ionic conductivity, mechanical robustness and thermal stability of rechargeable batteries.

Preparation and characterization of PVDF-MG49-NH4CF3SO3 based solid polymer electrolyte

e-Polymers ◽  
2014 ◽  
Vol 14 (2) ◽  
pp. 115-120 ◽  
Author(s):  
N. Ataollahi ◽  
A. Ahmad ◽  
T.K. Lee ◽  
A.R. Abdullah ◽  
M.Y.A. Rahman
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Vinylidene Fluoride ◽  
Lithium Ion ◽  
Linear Sweep Voltammetry ◽  
Solid Polymer ◽  
Conductivity Enhancement ◽  
Temperature Dependence Of Conductivity ◽  
Poly Vinylidene Fluoride ◽  
Ion Conducting

AbstractThe ionic conductivity of ammonium-based solid polymer films of poly(vinylidene fluoride) (PVDF) blended with MG49, a graft of natural rubber and poly(methyl methacrylate), with various compositions of ammonium triflate NH4CF3SO3, was investigated. As a result, 30 wt.% of NH4CF3SO3-doped polymer electrolyte exhibits the highest ionic conductivity at 6.32×10-4 S/cm at room temperature. The conductivity enhancement can be attributed to the increase in the number of NH4+ as charge carriers. The significance of the blend is the increase of one order in ionic conductivity as compared with pure PVDF electrolyte. The temperature dependence of conductivity of the electrolyte does not obey the Arrhenius law. However, the conductivity increases with temperature and it reached 1.56×10-3 S/cm at 363 K. X-ray diffraction reveals a decrease in crystallinity of the electrolyte upon the addition of NH4CF3SO3 salt. This result is supported by scanning electron microscopy. Linear sweep voltammetry demonstrates that the anodic stability of the electrolyte is up to 4 V. Therefore, the electrolyte shows good compatibility with high-voltage electrode. Hence, this electrolyte system can be a prospective candidate as lithium-ion conducting electrolyte for lithium batteries.

scholarly journals PEO Infiltration of Porous Garnet-Type Lithium-Conducting Solid Electrolyte Thin Films

Ceramics ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 421-436
Author(s):  
Aamir Iqbal Waidha ◽  
Vanita Vanita ◽  
Oliver Clemens
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Interfacial Resistance ◽  
Composite Electrolytes ◽  
Ion Conducting ◽  
Polymer Infiltration

Composite electrolytes containing lithium ion conducting polymer matrix and ceramic filler are promising solid-state electrolytes for all solid-state lithium ion batteries due to their wide electrochemical stability window, high lithium ion conductivity and low electrode/electrolyte interfacial resistance. In this study, we report on the polymer infiltration of porous thin films of aluminum-doped cubic garnet fabricated via a combination of nebulized spray pyrolysis and spin coating with subsequent post annealing at 1173 K. This method offers a simple and easy route for the fabrication of a three-dimensional porous garnet network with a thickness in the range of 50 to 100 µm, which could be used as the ceramic backbone providing a continuous pathway for lithium ion transport in composite electrolytes. The porous microstructure of the fabricated thin films is confirmed via scanning electron microscopy. Ionic conductivity of the pristine films is determined via electrochemical impedance spectroscopy. We show that annealing times have a significant impact on the ionic conductivity of the films. The subsequent polymer infiltration of the porous garnet films shows a maximum ionic conductivity of 5.3 × 10−7 S cm−1 at 298 K, which is six orders of magnitude higher than the pristine porous garnet film.

Sodium ion conducting gel polymer electrolyte using poly(vinylidene fluoride hexafluoropropylene)

2019 ◽  
Vol 241 ◽  
pp. 27-35 ◽  
Author(s):  
Duy Thanh Vo ◽  
Hoang Nguyen Do ◽  
Thien Trung Nguyen ◽  
Thi Tuyet Hanh Nguyen ◽  
Van Man Tran ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Vinylidene Fluoride ◽  
Gel Polymer Electrolyte ◽  
Sodium Ion ◽  
Poly Vinylidene Fluoride ◽  
Ion Conducting

scholarly journals Tuning the Properties of a UV-Polymerized, Cross-Linked Solid Polymer Electrolyte for Lithium Batteries

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 595 ◽  
Author(s):  
Preston Sutton ◽  
Martino Airoldi ◽  
Luca Porcarelli ◽  
Jorge L. Olmedo-Martínez ◽  
Clément Mugemana ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Lithium Ion ◽  
Ion Source ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Metal ◽  
Acrylic Polymer ◽  
Ion Conducting

Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.

The Evaluation of Ionic Conductivity in Polymer Electrolyte Membranes

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Danut-Ionel Vaireanu ◽  
Ioana Maior ◽  
Alexandra Grigore ◽  
David Savoiu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Electrochemical Cell ◽  
Electrochemical Impedance ◽  
Polymer Electrolyte Membranes ◽  
Membrane Thickness ◽  
Electrolyte Membranes ◽  
Conducting Membranes

A novel electrochemical cell for the evaluation of the ionic conductivity in polymer conducting membranes is proposed. This cell has the advantages of being able to determine with high precision the membrane thickness during electrochemical impedance spectroscopy measurements. A conductivity factor is also proposed in order to classify various membranes with respect to their conductivity versus a reference membrane, namely Nafion� 117.

scholarly journals Optimization of the Electrochemical Performance of a Composite Polymer Electrolyte Based on PVA-K2CO3-SiO2 Composite

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 92
Author(s):  
Bashir Abubakar Abdulkadir ◽  
John Ojur Dennis ◽  
Yas Al-Hadeethi ◽  
Muhammad Fadhlullah Bin Abd. Shukur ◽  
E. M. Mkawi ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Ionic Conduction ◽  
Electrochemical Impedance ◽  
Physicochemical Characterization ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Energy Storage Devices ◽  
Scanning Calorimetry ◽  
Thermal Stabilities

Composite polymer electrolyte (CPE) based on polyvinyl alcohol (PVA) polymer, potassium carbonate (K2CO3) salt, and silica (SiO2) filler was investigated and optimized in this study for improved ionic conductivity and potential window for use in electrochemical devices. Various quantities of SiO2 in wt.% were incorporated into PVA-K2CO3 complex to prepare the CPEs. To study the effect of SiO2 on PVA-K2CO3 composites, the developed electrolytes were characterized for their chemical structure (FTIR), morphology (FESEM), thermal stabilities (TGA), glass transition temperature (differential scanning calorimetry (DSC)), ionic conductivity using electrochemical impedance spectroscopy (EIS), and potential window using linear sweep voltammetry (LSV). Physicochemical characterization results based on thermal and structural analysis indicated that the addition of SiO2 enhanced the amorphous region of the PVA-K2CO3 composites which enhanced the dissociation of the K2CO3 salt into K+ and CO32− and thus resulting in an increase of the ionic conduction of the electrolyte. An optimum ionic conductivity of 3.25 × 10−4 and 7.86 × 10−3 mScm−1 at ambient temperature and at 373.15 K, respectively, at a potential window of 3.35 V was observed at a composition of 15 wt.% SiO2. From FESEM micrographs, the white granules and aggregate seen on the surface of the samples confirm that SiO2 particles have been successfully dispersed into the PVA-K2CO3 matrix. The observed ionic conductivity increased linearly with increase in temperature confirming the electrolyte as temperature-dependent. Based on the observed performance, it can be concluded that the CPEs based on PVA-K2CO3-SiO2 composites could serve as promising candidate for portable and flexible next generation energy storage devices.

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