Electrochemical Stability of High Conducting PAN-Based Electrolytes for Lithium Ion Polymer Cells

2014 ◽  
Vol 1024 ◽  
pp. 335-338
Author(s):  
Woon Gie Chong ◽  
Khairul Bahiyah Md Isa ◽  
Lisani Othman ◽  
Nurul Husna Zainol ◽  
Siti Mariam Samin ◽  
...  
Keyword(s):  
Ethylene Carbonate ◽  
Lithium Ion ◽  
Linear Sweep Voltammetry ◽  
Electrochemical Stability ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Charge Concentration ◽  
Lithium Tetrafluoroborate

Polyacrylonitrile (PAN) based polymer electrolytes composed of PAN, lithium tetrafluoroborate (LiBF4), ethylene carbonate (EC) and dimethyl phthalate (DMP) were prepared by solution casting technique. The variation of conductivity with LiBF4 concentrations of the prepared films has been studied using AC impedance spectroscopy. The conductivity of the films is charge concentration dependent and the highest room temperature conductivity of 1.08 ×10-2 S cm-1 is achieved for the film with optimum composition. The thermal activated conductivity of the films obeys Arrhenius rule in the temperature range from 303 K to 353 K. The electrochemical stability of the PAN-based films has been investigated using linear sweep voltammetry (LSV) with three electrodes system. The films were found to be electrochemically stable up to 4.4 V. The reversibility of the lithium ions conduction in the polymer electrolyte films have been studied using cyclic voltammetry (CV).

Electrical Property of Methylcellulose/Chitosan-NH4NO3-EC Plasticized Polymer Electrolyte

2015 ◽  
Vol 719-720 ◽  
pp. 82-86 ◽  
Author(s):  
N.L.M. Zazuli ◽  
A.S.A. Khiar
Keyword(s):  
Electrical Property ◽  
Polymer Electrolytes ◽  
Room Temperature ◽  
Ethylene Carbonate ◽  
Solution Casting ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Casting Technique ◽  
Dielectric Data ◽  
Solution Casting Technique

Polymer electrolytes blends of methylcellulose (MC)/chitosan-ammonium triflate (NH4CF3SO3) plasticized with Ethylene Carbonate (EC) were prepared by solution-casting technique. The effect on electrical property was investigated by impedance spectroscopy. Sample with 45 wt% of EC exhibit the highest room temperature conductivity of 2.16 × 10-4 Scm-1. Dielectric data were analyzed for the sample with the highest conductivity.

Investigation of Ionic Conduction and Morphological Properties of PMMA-Based Polymer Electrolytes Containing Lithium Iodide

2012 ◽  
Vol 545 ◽  
pp. 264-268
Author(s):  
Nurul Rozullyah Zulkepely ◽  
Siti Rohana Majid ◽  
Zurina Osman
Keyword(s):  
Room Temperature ◽  
Inorganic Salt ◽  
Ionic Conduction ◽  
Ethylene Carbonate ◽  
Morphological Properties ◽  
Lithium Iodide ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Casting Technique ◽  
Solution Casting Technique

In this study, the two systems of polymethylmethacrylate (PMMA) based polymer electrolyte films have been prepared by the solution casting technique. Lithium iodide (LiI) and ethylene carbonate (EC) were used as inorganic salt and plasticizer, respectively. The highest room temperature conductivity for the plasticized system and unplasticized system is 4.42 x 10-5Scm-1and 4.37 x 10-6Scm-1, respectively. The conductivity-temperature dependence studies have been performed on these films in the temperature range of 303 K to 373 K. It can be observed that the logσversus 1000/T plots obey the Arrhenius rule and VTF rule for the plasticized film and unplasticized film, respectively [1-3]. The surface morphology of the plasticized and unplasticized films was observed by using scanning electron microscope (SEM).

UV-Cured polypropylene mesh-reinforced composite polymer electrolyte membranes

e-Polymers ◽  
2015 ◽  
Vol 15 (2) ◽  
pp. 103-110 ◽  
Author(s):  
Emrah Çakmakçı ◽  
Mustafa Hulusi Uğur ◽  
Atilla Güngör
Keyword(s):  
Polymer Electrolyte ◽  
Polypropylene Mesh ◽  
Ethylene Carbonate ◽  
Composite Membranes ◽  
Electrochemical Stability ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Polyethylene Glycol Diacrylate

AbstractIn this study, a polypropylene (PP) mesh was used to prepare proton- and Li+ conducting composite membranes for fuel cells and lithium rechargeable batteries, respectively. For the preparation of Li+ conducting membrane, polypropylene mesh was first immersed in an electrolyte solution, which was composed of LiBF4 and ethylene carbonate. Then the swollen membrane was immersed in an acetone solution of polyethylene glycol diacrylate (PEGDA), polyvinylidenefluoride-co-hexafluoro-propylene and photoinitiator. Finally, PP fabric was taken out from the solution and exposed to UV irradiation. Furthermore, proton conducting membranes were prepared by immersing the PP mesh into a mixture of vinyl phosphonic acid, PEGDA and photoinitiator. Afterwards, samples were cured under UV light. PP-reinforced membranes designed for fuel cell applications exhibited a room temperature conductivity of 3.3×10-3 mS/cm, while UV-cured electrolyte for Li batteries showed ionic conductivities in the range of 1.61×10-3–5.4×10-3 S/cm with respect to temperature. In addition, for lithium-doped composite polymer electrolyte (CPE), the electrochemical stability window was negligible below 4.75 V vs. Li/Li+. It is concluded that lithium-doped CPE has suitable electrochemical stability to allow the use of high-voltage electrode couples.

Conductivity and Dielectric Studies of Methylcellulose/Chitosan-NH4CF3SO3 Polymer Electrolyte

2013 ◽  
Vol 594-595 ◽  
pp. 818-822 ◽  
Author(s):  
K.Z. Hamdan ◽  
A.S.A. Khiar
Keyword(s):  
Room Temperature ◽  
Methyl Cellulose ◽  
Solution Casting ◽  
Dielectric Studies ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Casting Technique ◽  
Dielectric Data ◽  
Solution Casting Technique ◽  
Chitosan Blends

Films of methyl cellulose (MC) /chitosan blends were prepared via solution casting technique and their properties with different amount of ammonium trilate, NH4CF3SO3 were compared. Measurements of conductivity as a function of frequency at room temperature on these films were carried out using HIOKI 3532-50 LCR Hi-Tester where the frequency was set between 50 Hz to 1 MHz. Samples having 40 wt% of NH4CF3SO3 exhibit the highest room temperature conductivity of (4.99±4.18) x 10-6 Scm-1. Dielectric data were analyzed using complex permittivity and complex electrical modulus for the sample with the highest ionic conductivity.

Investigation on the Effect of TiO2 Nanofiller to the Structural and Conductivity Characteristics of Poly(vinylidene fluoride-co-hexafluoropropylene)/Poly(ethyl methacrylate) Based Polymer Electrolytes System

2013 ◽  
Vol 594-595 ◽  
pp. 604-607
Author(s):  
Siti Rudhziah ◽  
N.S. Mohamed
Keyword(s):  
Polymer Electrolytes ◽  
Vinylidene Fluoride ◽  
Scanning Calorimetry ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Casting Technique ◽  
Ethyl Methacrylate ◽  
Nanocomposite Polymer ◽  
Poly Vinylidene Fluoride ◽  
Solution Casting Technique

In this study, Poly (vinylidene fluoride-co-hexafluoropropylene)/Poly (ethyl methacrylate (PEMA) nanocomposite polymer electrolytes was prepared by solution casting technique. The effects of TiO2 nanofiller on the structural, thermal and conductivity characteristics were examined using x-ray diffraction, scanning electron microscopy, differential scanning calorimetry and impedance spectroscopy. The crystallinity and conductivity of the salted system are found to increase with the addition of TiO2. The system containing 5 wt % of TiO2 exhibited the highest room temperature conductivity of 1.32 × 10-3 S cm-1.

scholarly journals Direct surface coating of high voltage LiCoO2 cathode with P(VDF-HFP) based gel polymer electrolyte

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24533-24541
Author(s):  
Huiling Chen ◽  
Yuehua Wen ◽  
Yue Wang ◽  
Songtong Zhang ◽  
Pengcheng Zhao ◽  
...  
Keyword(s):  
High Voltage ◽  
Surface Coating ◽  
Gel Polymer Electrolyte ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
Solution Casting ◽  
Ion Conductor ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Li Ion

For high-voltage cycling of lithium-ion batteries, a Li-ion conductor layer, P(VDF-HFP)/LiTFSI with high electrochemical stability has been coated on the surfaces of as-formed LiCoO2 cathodes by a solution casting technique at low temperature.

Ionic Transport and Electrochemical Properties of PMMA-Based Gel Polymer Electrolytes for Magnesium Batteries

2014 ◽  
Vol 1024 ◽  
pp. 348-351 ◽  
Author(s):  
Nurul Husna Zainol ◽  
Mohd. Zharfan Mohd. Halizan ◽  
Woon Gie Chong ◽  
Zurina Osman
Keyword(s):  
Polymer Electrolytes ◽  
Electrochemical Impedance ◽  
Ethylene Carbonate ◽  
Linear Sweep Voltammetry ◽  
Rechargeable Batteries ◽  
Gel Polymer Electrolytes ◽  
Free Standing ◽  
Casting Technique ◽  
Electrochemical Window ◽  
Solution Casting Technique

Poly (methyl) methacrylate (PMMA)-based gel polymer electrolytes (GPEs) containing magnesium triflate, Mg (CF3SO3)2 salt were prepared using solution casting technique. Different concentrations of Mg (CF3SO3)2 ranging from 5 wt.% to 30 wt.% have been added into a mixture of ethylene carbonate (EC) and propylene carbonate (PC) with a fixed mass ratio of 2:1. These free-standing GPE films were characterized using electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV) and cyclic voltammetry (CV). The highest ionic conductivity of 1.27 x 10-3 S cm-1 is obtained from the GPE film containing 20 wt.% of Mg (CF3SO3)2 salt. The electrochemical window stability has been found in the range of-2.5 V to 2.5 V for the highest conducting GPE film. This value is considerably high enough for the GPE film to be used as electrolyte in magnesium rechargeable batteries.

scholarly journals Resorcinol-Formaldehyde (RF) as a Novel Plasticizer for Starch-Based Solid Biopolymer Electrolyte

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2170
Author(s):  
Vidhya Selvanathan ◽  
Mohd Hafidz Ruslan ◽  
Mohammod Aminuzzaman ◽  
Ghulam Muhammad ◽  
N. Amin ◽  
...  
Keyword(s):  
Polymer Electrolyte Membrane ◽  
Amorphous Region ◽  
Lithium Triflate ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Resorcinol Formaldehyde ◽  
Casting Technique ◽  
Electrolyte Membrane ◽  
Solution Casting Technique ◽  
Biopolymer Electrolyte

A starch-resorcinol-formaldehyde (RF)-lithium triflate (LiTf) based biodegradable polymer electrolyte membrane was synthesized via the solution casting technique. The formation of RF crosslinks in the starch matrix was found to repress the starch’s crystallinity as indicated by the XRD data. Incorporation of the RF plasticizer improved the conductivity greatly, with the highest room-temperature conductivity recorded being 4.29 × 10−4 S cm−1 achieved by the starch:LiTf:RF (20 wt.%:20 wt.%:60 wt.%) composition. The enhancement in ionic conductivity was an implication of the increase in the polymeric amorphous region concurrent with the suppression of the starch’s crystallinity. Chemical complexation between the plasticizer, starch, and lithium salt components in the electrolyte was confirmed by FTIR spectra.

scholarly journals Synthesis and Characterization of Lithium-Ion Conductive LATP-LaPO4 Composites Using La2O3 Nano-Powder

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3502
Author(s):  
Fangzhou Song ◽  
Masayoshi Uematsu ◽  
Takeshi Yabutsuka ◽  
Takeshi Yao ◽  
Shigeomi Takai
Keyword(s):  
Room Temperature ◽  
Conduction Mechanism ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
X Ray ◽  
Nano Powder ◽  
Powder Addition

LATP-based composite electrolytes were prepared by sintering the mixtures of LATP precursor and La2O3 nano-powder. Powder X-ray diffraction and scanning electron microscopy suggest that La2O3 can react with LATP during sintering to form fine LaPO4 particles that are dispersed in the LATP matrix. The room temperature conductivity initially increases with La2O3 nano-powder addition showing the maximum of 0.69 mS∙cm−1 at 6 wt.%, above which, conductivity decreases with the introduction of La2O3. The activation energy of conductivity is not largely varied with the La2O3 content, suggesting that the conduction mechanism is essentially preserved despite LaPO4 dispersion. In comparison with the previously reported LATP-LLTO system, although some unidentified impurity slightly reduces the conductivity maximum, the fine dispersion of LaPO4 particles can be achieved in the LATP–La2O3 system.

Ionic Conductivity, Morphology and Transport Number of Lithium Ions in PMMA Based Gel Polymer Electrolytes

2013 ◽  
Vol 334-335 ◽  
pp. 137-142 ◽  
Author(s):  
Lisani Othman ◽  
Khairul Bahiyah Md. Isa ◽  
Zurina Osman ◽  
Rosiyah Yahya
Keyword(s):  
Ionic Conductivity ◽  
Salt Concentration ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Gel Polymer Electrolytes ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Temperature Dependence Of Conductivity ◽  
Solution Casting Technique

The gel polymer electrolytes (GPEs) composed of polymethylmethacrylate (PMMA) with lithium trifluoromethanesulfonate (LiCF3SO3) salt dissolved in a binary mixture of ethylene carbonate (EC) and propylene carbonate (PC) organic solvents have been prepared by the solution casting technique. The samples are prepared by varying the salt concentrations from 5 wt.% to 30 wt.%. Impedance spectroscopy measurement has been carried out to determine the ionic conductivity of the samples. The sample containing 25 wt.% of LiCF3SO3salt exhibits the highest room temperature ionic conductivity of 2.56 x 10-3S cm-1. The conductivity of the GPEs has been found to depend on the salt concentration added to the sample, while at higher salt concentration reveals a decrease in the ionic conductivity due to ions association. The temperature dependence of conductivity from 303 K to 373 K is found to obey the Arrhenius law. The ionic transference number,tiof GPEs has been estimated by the DC polarization method and the value is found to be 0.98, 0.93, and 0.97 for the sample containing 25 wt.%, 5 wt.% and 30 wt.% respectively. This result is consistent with the conductivity studies.

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