scholarly journals Preparation and Characterization of Ultraviolet-cured Polymer Electrolyte Poly(glycidyl methacrylate-co-methyl methacrylate)

2014 ◽  
Vol 17 (4) ◽  
pp. 213-217
Author(s):  
M. Imperiyka ◽  
A. Ahmad ◽  
S. A. Hanifah ◽  
M. Y.A. Rahman ◽  
N. S. Mohamed
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Electrolyte ◽  
Glycidyl Methacrylate ◽  
Room Temperature ◽  
Lithium Ion ◽  
Solid Polymer ◽  
Lithium Triflate ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Exponential Factor

Effect of lithium triflate (LiTf) concentration on the properties of poly (glycidyl methacrylate-co-methyl methacrylate) P(GMAco-MMA)-based solid polymer electrolyte was investigated. The copolymer of (GMA-co-MMA) was synthesized by photopolymerization method. P(GMA–MMA) was fixed at the ratio of 90:10 based on the conductivity result of the electrolyte film. The electrolyte samples were characterized using impedance spectroscopy (EIS), cyclic voltammetry (CV) and thermogravimetric analysis (TGA). The room temperature conductivity was improved about six orders upon the addition of 30 wt. % LiTf salt into the polymer host. The highest room temperature conductivity was 1.4×10-6 S cm-1 at 30 wt. % LiTf. The highest conductivity of 1.25×10-4 S cm-1 was achieved at 393 K. The polymer electrolyte system exhibits Arrhenius-like behavior with the pre-exponential factor of 1.25×10-4 S cm-1 and activation energy of 0.39 eV. The electrolyte showed electrochemical stability window up to 3 V. The thermal stability increases with the salt concentration. The above results indicate that the electrolyte has potential for lithium ion battery application.

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.

A comparative study of Li10.35Ge1.35P1.65S12 and Li10.5Ge1.5P1.5S12 superionic conductors

2020 ◽  
Vol 13 (06) ◽  
pp. 2050031
Author(s):  
Yue Jiang ◽  
Zhiwei Hu ◽  
Ming’en Ling ◽  
Xiaohong Zhu
Keyword(s):  
Ionic Conductivity ◽  
Room Temperature ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Lattice Parameter ◽  
Superionic Conductors ◽  
Chemical Compositions ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Ion Conductor

Since the lithium-ion conductor Li[Formula: see text]GeP2S[Formula: see text] (LGPS) with a super high room-temperature conductivity of 12[Formula: see text]mS/cm was first reported in 2011, sulfide-type solid electrolytes have been paid much attention. It was suggested by Kwon et al. [J. Mater. Chem. A 3, 438 (2015)] that some excess lithium ions in LGPS, namely, Li[Formula: see text]Ge[Formula: see text] P[Formula: see text]S[Formula: see text], could further improve their ionic conductivities, and the highest conductivity of 14.2[Formula: see text]mS/cm was obtained at [Formula: see text] though a larger lattice parameter that occurred at [Formula: see text]. In this study, we focus on these two different chemical compositions of LGPS with [Formula: see text] and [Formula: see text], respectively. Both samples were prepared using the same experimental process. Their lattice parameter, microstructure and room-temperature ionic conductivity were compared in detail. The results show that the main phase is the tetragonal LGPS phase but with a nearly identical amount of orthorhombic LGPS phase coexisting in both samples. Bigger lattice parameters, larger grain sizes and higher ionic conductivities are simultaneously achieved in Li[Formula: see text]Ge[Formula: see text]P[Formula: see text]S[Formula: see text] ([Formula: see text]), exhibiting an ultrahigh room-temperature ionic conductivity of 18.8[Formula: see text]mS/cm.

Electrical and structural properties of multi-walled carbon nanotube–doped polymer electrolyte for photo electrochemical device

2018 ◽  
Vol 30 (8) ◽  
pp. 949-956 ◽  
Author(s):  
A Sachdeva ◽  
B Bhattacharya ◽  
Vijay Singh ◽  
Abhimanyu Singh ◽  
SK Tomar ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Electrolyte ◽  
Ethylene Carbonate ◽  
Electronic Conductivity ◽  
Complex Impedance ◽  
Solid Polymer ◽  
Arrhenius Behavior ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Multi Walled Carbon Nanotube

The present investigation deals with the preparation of multi-walled carbon nanotube (MWCNT)-doped plasticized polymer electrolyte. The nanocomposite has been prepared using solution casting method. Complex impedance spectroscopy study revealed the utmost room temperature conductivity of 5.6 × 10−4 S/cm when optimized plasticized polymer electrolyte (poly(ethyl methacrylate)+30% sodium iodide+60% ethylene carbonate) was doped with 7% MWCNT. Temperature dependence of conductivity showed Arrhenius behavior. The surface morphology and crystalline–amorphous deviation of the composite was observed using scanning electron microscope. Perfect complexation of various components of the composite was confirmed from Fourier-transform infrared spectroscopy and X-ray diffraction (XRD) data. The transference number measurement was done to calculate the proportionate amount of ionic and electronic conductivity. A dye sensitized solar cell has been fabricated using maximum ionic conductivity of solid polymer electrolyte and its electrical parameters measured at 1 sun condition.

Solid State Reaction Synthesis and Characterization of Lithium Lanthanum Titanate Lithium-Ion Conducting Solid Electrolyte with Different Li to La Content

2019 ◽  
Vol 821 ◽  
pp. 389-394
Author(s):  
Andrew Dono ◽  
Rinlee Butch Cervera
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Lithium Ion ◽  
Reaction Synthesis ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Lithium Lanthanum Titanate ◽  
Lanthanum Titanate

Lithium Lanthanum Titanate, Li3xLa(2/3)-x□(1/3)-2xTiO3, with three different compositions of (i) x = 0.097 (Li0.29La0.57TiO3), (ii) x = 0.117 (Li0.35La0.55TiO3), and (iii) x = 0.167 (Li0.50La0.50TiO3) were prepared via solid state reaction synthesis sintered at 1150 °C for 36 hours. X-ray diffraction (XRD) analysis revealed that all samples can be indexed to a cubic perovskite structure with lattice parameter a of about 3.86 Å. Morphological analysis using SEM showed that the samples are relatively dense and the calculated relative density of the LLTO samples range from about 94% to as high as 99% with increasing trend as Li content increases. Room temperature conductivity and its temperature dependence up to 120 °C were investigated. LLTO sample with x =0.117 revealed the highest total ionic conductivity at room temperature of about 1.69 x 10-03 S/cm which can be a promising solid electrolyte for an all-solid-state lithium-ion batteries.

The Synthesis and Properties of a Novel Solid Polyphosphazene Electrolyte for Lithium Ion Battery

2010 ◽  
Vol 148-149 ◽  
pp. 749-752
Author(s):  
Ming Shan Yang ◽  
Jian Wei Liu ◽  
Jin Yu ◽  
Xu Zhang ◽  
Jing Wei ◽  
...  
Keyword(s):  
High Temperature ◽  
Lithium Ion Battery ◽  
Ring Opening ◽  
Room Temperature ◽  
Lithium Ion ◽  
Ring Opening Polymerization ◽  
Decomposition Temperature ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Synthesis Parameters

Polydichlorophosphazene was synthesized from hexachlorocyclotriphosphazene by high-temperature ring-opening polymerization, and poly(2-(2-methoxyethoxy) ethanol phosphazene)(MEEP) was synthesized by reacting polydichlorophosphazene with alcohol sodium. The optimal synthesis parameters were obtained and the structure of MEEP was analyzed by NMR. Then polyphosphazene electrolyte was prepared by mixing MEEP with LiCF3SO3. The results indicated that the electrolyte prepared in this paper has high decomposition temperature, and its room-temperature conductivity is up to 1.187×10-4 S/cm.

scholarly journals Effect of High Ammonium Salt Concentration and Temperature on the Structure, Morphology, and Ionic Conductivity of Proton-Conductor Solid Polymer Electrolytes Based PVA

Membranes ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 262
Author(s):  
Maryam A. M. Saeed ◽  
Omed Gh. Abdullah
Keyword(s):  
Polymer Electrolyte ◽  
Salt Concentration ◽  
Solid Polymer Electrolyte ◽  
Proton Conductor ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Present System ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Proton Conducting

Polyvinyl alcohol (PVA) based proton-conducting solid polymer electrolyte was prepared with a high salt concentration of ammonium nitrate (NH4NO3) by the technique of solvent casting. From the X-ray diffraction studies, the semicrystalline nature of PVA with the inclusion of NH4NO3 was studied. XRD analysis indicates that the highest ion conductive sample exhibits the minimum crystalline nature. The decreasing trend of Jonscher-exponent with temperature rise reveals that the present system is insured by the correlated barrier hopping (CBH) model. The maximum room temperature conductivity was found to be 5.17 × 10−5 S/cm for PVA loaded 30 wt.% of NH4NO3. The ionic transport of the proton-conducting solid polymer electrolyte was studied at the temperature range of 303–353 K. The conductivity-temperature relationship of the systems was analyzed using both the Arrhenius and Vogel–Tammann–Fulcher (VTF) models to explain the ionic hopping mechanism for the system.

Preparation and Characterization of Composite Polymer Electrolyte

2012 ◽  
Vol 571 ◽  
pp. 17-21 ◽  
Author(s):  
Wei Min Wang
Keyword(s):  
Polymer Electrolyte ◽  
Materials Science ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Energy Materials ◽  
Composite Electrolyte ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity

Composite polymer electrolyte materials are widely used in the electrochromic glass, rechargeable lithium-ion batteries, supercapacitors, and other fields, all solid-state electrolyte to overcome the problems of the conventional liquid electrolyte rheology, chemical stability and security, applications and rangewill continue to expand. The room temperature conductivity of composite electrolytes should be improved, the need to conduct groundbreaking research in the preparation process of the composite electrolyte materials, structure and properties, there are many problems. The composite polymer electrolyte materials has become an intersection of many disciplines including materials science, chemistry, physics, and the content may lead to the field of new energy materials, in particular, is a new technological revolution in the field of battery materials, which study of the problem will continue and in-depth.

Influence of Weight Ratio of Citric Acid Cross Linker on the Structure and Conductivity of the Crosslinked Polymer Electrolytes

2011 ◽  
Vol 391-392 ◽  
pp. 1075-1079
Author(s):  
Gui Jie Liang ◽  
Wei Lin Xu ◽  
Jie Xu ◽  
Xiao Lin Shen ◽  
Mu Yao
Keyword(s):  
Citric Acid ◽  
Polymer Electrolyte ◽  
Mechanical Stability ◽  
Weight Ratio ◽  
Solid Polymer ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
The Matrix ◽  
Polyester Matrix ◽  
Cross Linker

A novel kind of efficient solid polymer electrolyte (SPE) based on crosslinked polyester matrix has been prepared by employing low molecular weight PEG (oligo-PEG, Mw = 400 g/mol), followed by crosslinking of the PEG with citric acid (CA). The oligo-PEG, with small coil size, can be easily penetrated into mesopores of TiO2 photoelectrode, while the mechanical stability of the SPE can also be maintained by crosslinking. The factor of weight ratio of CA cross linker in the hybrid plays an important role in determining the intersegmental distance and free volume of the polymer matrix, which sequentially affects the electrochemical activity of the conductive ions and then the ionic conductivity of the polymer electrolyte. By using the 32.4 wt.% CA in the matrix, the SPE with the optimal room temperature conductivity (σ) of 5.43×10-5 S/cm was obtained.

scholarly journals Old Donors for New Molecular Conductors: Combining TMTSF and BEDT-TTF with Anionic (TaF6)1−x/(PF6)x Alloys

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 386
Author(s):  
Magali Allain ◽  
Cécile Mézière ◽  
Pascale Auban-Senzier ◽  
Narcis Avarvari
Keyword(s):  
Single Crystal ◽  
Room Temperature ◽  
Density Wave ◽  
Spin Density Wave ◽  
Orthorhombic Phase ◽  
Molecular Conductors ◽  
Bechgaard Salts ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Resistivity Measurements

Tetramethyl-tetraselenafulvalene (TMTSF) and bis(ethylenedithio)-tetrathiafulvalene (BEDT-TTF) are flagship precursors in the field of molecular (super)conductors. The electrocrystallization of these donors in the presence of (n-Bu4N)TaF6 or mixtures of (n-Bu4N)TaF6 and (n-Bu4N)PF6 provided Bechgaard salts formulated as (TMTSF)2(TaF6)0.84(PF6)0.16, (TMTSF)2(TaF6)0.56(PF6)0.44, (TMTSF)2(TaF6)0.44(PF6)0.56 and (TMTSF)2(TaF6)0.12(PF6)0.88, together with the monoclinic and orthorhombic phases δm-(BEDT-TTF)2(TaF6)0.94(PF6)0.06 and δo-(BEDT-TTF)2(TaF6)0.43(PF6)0.57, respectively. The use of BEDT-TTF and a mixture of (n-Bu4N)TaF6/TaF5 afforded the 1:1 phase (BEDT-TTF)2(TaF6)2·CH2Cl2. The precise Ta/P ratio in the alloys has been determined by an accurate single crystal X-ray data analysis and was corroborated with solution 19F NMR measurements. In the previously unknown crystalline phase (BEDT-TTF)2(TaF6)2·CH2Cl2 the donors organize in dimers interacting laterally yet no organic-inorganic segregation is observed. Single crystal resistivity measurements on the TMTSF based materials show typical behavior of the Bechgaard phases with room temperature conductivity σ ≈ 100 S/cm and localization below 12 K indicative of a spin density wave transition. The orthorhombic phase δo-(BEDT-TTF)2(TaF6)0.43(PF6)0.57 is semiconducting with the room temperature conductivity estimated to be σ ≈ 0.16–0.5 S/cm while the compound (BEDT-TTF)2(TaF6)2·CH2Cl2 is also a semiconductor, yet with a much lower room temperature conductivity value of 0.001 to 0.0025 S/cm, in agreement with the +1 oxidation state and strong dimerization of the donors.

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