Preparation and characterization of gel polymer electrolytes for solid state magnesium batteries

Oh, Ji Sun; Ko, Jang Myoun; Kim, Dong-Won

doi:10.1016/j.electacta.2004.01.099

Cited by 65 publications

(34 citation statements)

References 7 publications

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“…Polymer electrolytes have been studied extensively by researchers because of their potential applications, namely, in high-energy density batteries and fuel cells [2]. The key advantages of solid polymeric electrolytes over liquid electrolytes are good mechanical properties, ease of fabrication to thin films, desirable sizes, and their capability to form proper electrode-electrolyte contact [3,4]. Polymer electrolytes with sufficiently high room temperature conductivity have attained considerable interest in recent years in the area of polymer research due to theoretical concerns as well as practical importance for the development of electrochemical devices [5].…”

Section: Introductionmentioning

confidence: 99%

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

Aziz

2013

Iran Polym J

150

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In this work, solid polymer electrolytes based on poly(e-caprolactone) (PCL) with lithium bis(oxalato)borate as a doping salt were prepared by solution cast technique using DMF as a solvent. The electrical DC conductivity and dielectric constant of the solid polymer electrolyte samples were investigated by electrochemical impedance spectroscopy over a frequency range from 50 Hz to 1 MHz. It was found that the DC conductivity increased with increase in the salt concentration to up to 4 wt% and thereafter decreased. Dielectric constant versus salt concentration was used to interpret the decrease in DC conductivity with increase in salt concentration. The DC conductivity as a function of temperature follows Arrhenius behavior in low temperature region, which reveals that ion conduction occurs through successful hopping. The curvature of DC conductivity at high temperatures indicates the contribution of segmental motion to ion conduction. High values for dielectric constant and dielectric loss were observed at low frequencies. The plateau of dielectric constant and dielectric loss at high frequencies can be observed as a result of rapid oscillation of the AC electric field. The HN dielectric function was utilized to study the dielectric relaxation. The experimental and theoretical data of dielectric constant are very close to each other at low temperatures. At high temperatures, the simulated data are more deviated from the experimental curve of dielectric constant due to the dominance of electrode polarization. The non-unity of relaxation parameters (a and b) reveals that the relaxation processes in PCL-based solid electrolyte is a non-Debye type of relaxation.

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Section: Introductionmentioning

confidence: 99%

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

Aziz

2013

Iran Polym J

150

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“…With the contents of nano-MgO increasing, too much nano-MgO hinders the motion of mobile ions. Thus, the conductivity declines after the second conductivity maximum [20]. The optimum conductivity value of the GPEs is 6.8 × 10 −3 S/cm (GPE with 3 wt % MgO).…”

Section: Ionic Conductivitymentioning

confidence: 99%

“…This predicts the membrane with MgO 7% will have a higher ionic conductivity. conductivity [18][19][20][21][22][23]. To prepare superior GPE, electrospinning technique is a particular and useful way [24][25][26].…”

Section: Morphology/structure and Differential Scanning Calorimeter Amentioning

confidence: 99%

Studies on the Effect of Nano-Sized MgO in Magnesium-Ion Conducting Gel Polymer Electrolyte for Rechargeable Magnesium Batteries

Wang

Wei

et al. 2017

Energies

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Magnesium-ion conducting gel polymer electrolytes (GPEs) with different contents of nano-sized MgO have been prepared and investigated by various electrical and electrochemical techniques. The Mg 2+ ion conduction in GPEs was confirmed from cyclic voltammetry and impedance analysis. It was found that doping appropriate nano-sized MgO in the GPE can induce significant improvements in both the electrochemical and the mechanical properties of GPEs. The composite GPE with 7% MgO shows a high ionic conductivity of 4.6 × 10 −3 S/cm with electrochemical stability up to 4.7 V versus Mg 2+ /Mg at room temperature. Furthermore, it is free-standing and flexible with high tensile strength (9.7 ± 0.1 MPa) and elongation at break (91.7 ± 0.2%), further ensuring their potential applications as GPEs for rechargeable Mg batteries.

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“…It is made by the impregnation of liquid electrolytes into the polymer matrix and its ionic conductivity is very close to that of liquid electrolytes at room temperature [1]. Many types of polymer have been successfully made as GPEs such as polymethylmethacrylate (PMMA) [2], polyvinylidenefluoride-cohexafluoropropylene (PVdF-HFP) [3][4], and PVdF/PEGDA/PMMA [5], and they possessed high values of conductivity up to 10 -3 S cm -1 .…”

Section: Introductionmentioning

confidence: 99%