Effect of salt concentration on the glass transition temperature and ionic conductivity of poly(ethylene glycol)-polyurethane/LiClO4 complexes

Huh, PilHo; Choi, Myung-Geun; Jo, Nam‐Ju; Lee, Jin-Kook; Lee, Jang-Oo; Yang, Wongkang

doi:10.1007/bf03218421

Cited by 21 publications

(15 citation statements)

References 15 publications

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“…A high salt content renders lithium ions available for coordination with PEG units, thereby reducing the tendency to form crystalline phases. In accordance with a general trend, the T g of polymer–salt complexes increases with the addition of salt due to the formation of transient crosslinking between polymer chains via the coordinated interaction between the polymer chains and salt . The same trend was observed in both kinds of crosslinked network polymers in this study owing to the formation of transient crosslinking, as shown in Table .…”

Section: Resultssupporting

confidence: 89%

Bifunctional poly(ethylene glycol) based crosslinked network polymers as electrolytes for all‐solid‐state lithium ion batteries

Grewal

Tanaka

Kawakami

2019

Polymer International

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Polymer electrolyte based lithium ion batteries represent a revolution in the battery community due to their intrinsic enhanced safety, and as a result polymer electrolytes have been proposed as a replacement for conventional liquid electrolytes. Herein, the preparation of a family of crosslinked network polymers as electrolytes via the ‘click‐chemistry’ technique involving thiol‐ene or thiol‐epoxy is reported. These network polymer electrolytes comprise bifunctional poly(ethylene glycol) as the lithium ion solvating polymer, pentaerythritol tetrakis (3‐mercaptopropionate) as the crosslinker and lithium bis(trifluoromethane)sulfonimide as the lithium salt. The crosslinked network polymer electrolytes obtained show low Tg, high ionic conductivity and a good lithium ion transference number (ca 0.56). In addition, the membrane demonstrated sterling mechanical robustness and high thermal stability. The advantages of the network polymer electrolytes in this study are their harmonious characteristics as solid electrolytes and the potential adaptability to improve performance by combining with inorganic fillers, ionic liquids or other materials. In addition, the simple formation of the network structures without high temperatures or light irradiation has enabled the practical large‐area fabrication and in situ fabrication on cathode electrodes. As a preliminary study, the prepared crosslinked network polymer materials were used as solid electrolytes in the elaboration of all‐solid‐state lithium metal battery prototypes with moderate charge–discharge profiles at different current densities leaving a good platform for further improvement. © 2018 Society of Chemical Industry

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Section: Resultssupporting

confidence: 89%

Bifunctional poly(ethylene glycol) based crosslinked network polymers as electrolytes for all‐solid‐state lithium ion batteries

Grewal

Tanaka

Kawakami

2019

Polymer International

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“…According to Bhattacharya et al [35] systems containing salt with smaller cations exhibit higher conductivity due to higher mobility of the cation. The conductivity values obtained in this work are comparable with that reported by Huh et al [34], which is 2.6 × 10…”

Section: Room Temperature Conductivitysupporting

confidence: 91%

“…At high salt concentration, the distance between dissociated ions became too close to each other enabling them to recombine into neutral ion-pairs and do not contribute to conductivity. Such phenomenon has also been reported in the literature [17,33,34]. By comparing the systems containing LiI and NaI, the conductivity is higher for PU-LiI compared to that for PU-NaI due to the size of cations.…”

Section: Room Temperature Conductivitysupporting

confidence: 83%

Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes

2015

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Abstract:Castor oil-based polyurethane as a renewable resource polymer has been synthesized for application as a host in polymer electrolyte for electrochemical devices. The polyurethane was added with LiI and NaI in different wt% to form a film of polymer electrolytes. The films were characterized by using attenuated total reflectance-Fourier transform infrared spectroscopy, dynamic mechanical analysis, electrochemical impedance spectroscopy, linear sweep voltammetry and transference number measurement. The highest conductivity of 1.42 × 10 upon addition of 30 wt% NaI at room temperature. The temperature dependence conductivity plot indicated that both systems obeyed Arrhenius law. The activation energy for the PU-LiI and PU-NaI systems were 0.13 and 0.22 eV. Glass transition temperature of the synthesized polyurethane decreased from −15.8 °C to ~ −26 to −28 °C upon salts addition. These characterizations exhibited the castor oil-based polyurethane polymer electrolytes have potential to be used as alternative membrane for electrochemical devices.

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“…In fact, as mentioned before, there is usually a difference of 10–15°C or so between the values of T g determined by the DSC and DMTA techniques. 37…”

Section: Resultsmentioning

confidence: 99%

“…In fact, as mentioned before, there is usually a difference of 10-15 C or so between the values of T g determined by the DSC and DMTA techniques. 37 T g values of PS-filled silica versus filler volume fraction are plotted for both dynamic and thermal mode in Figure 3. The slope of T g curve is a proper parameter for determining T g shift velocity, which is due to nanoparticle size.…”

Section: Thermal Studymentioning

confidence: 99%

Highly nanofilled polystyrene composite

Kourki

Famili

Mortezaei

et al. 2016

Journal of Elastomers & Plastics

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Highly filled systems, such as dental materials and tires, have some exceptional properties that make them very special for particular scientists and engineers. In this study, the thermal and dynamic properties of highly nanosilica-filled polystyrene were investigated. Thermal study predicts a phase in the filled system, named as adsorbed polymer, that has a different glass transition temperature (T g ) compared with the neat polymer. The adsorbed polymer seems to be responsible for special thermal properties of the highly filled system. The dynamic properties of the filled system are observed to have a similar trend as the thermal behavior at different particle sizes and concentrations, both increasing linearly with the increase of volume fraction of adsorbed polymer. However, at higher volume fractions or for smaller particles, this trend changes and the filler networking mechanism is considered to be the reason for this change. Effect of the filler network is studied through the Han plot and it is found that the contribution of the filler network to the dynamic behavior of the highly filled system increases by reducing the particle size and increasing the particle loading. Beside the particle size and concentration, the effect of filler surface physics on dynamic and thermal behavior of the highly filled system is investigated and it is found that surface modification of the particle surface with nonpolar groups tends to lower T g and volume fraction for the adsorbed phase and lower strength of the filler network. In this work, the samples were prepared using the method of stabilizing suspension in polymer solution. For viscoelastic investigation, the dynamic rheometry in sweep mode was chosen, also for studying the thermal Downloaded from behavior, differential scanning calorimetric tests were performed. In addition, in order to study the structure of filler in low and highly filled samples, atomic force microscopic imaging was employed.

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Effect of salt concentration on the glass transition temperature and ionic conductivity of poly(ethylene glycol)-polyurethane/LiClO4 complexes

Cited by 21 publications

References 15 publications

Bifunctional poly(ethylene glycol) based crosslinked network polymers as electrolytes for all‐solid‐state lithium ion batteries

Bifunctional poly(ethylene glycol) based crosslinked network polymers as electrolytes for all‐solid‐state lithium ion batteries

Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes

Highly nanofilled polystyrene composite

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