scholarly journals Solid Polymer Electrolytes Derived from Oligomeric Poly(ethylene oxide) Chain-Grafted Crosslinked Polystyrene Microspheres

2020 ◽  
pp. 17-23
Author(s):  
Wendy Zhao ◽  
Xinyi Mei ◽  
Zheng Yue ◽  
Braja K Mandal
Keyword(s):  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Scanning Calorimetry ◽  
Crosslinked Polystyrene ◽  
Poly Ethylene Oxide ◽  
Ion Conducting ◽  
Poly Ethylene ◽  
Surface Morphologies

A new class of lithium-ion conducting Solid Polymer Electrolytes (SPEs) has been derived from oligomeric Polyethylene Oxide (PEO)-grafted Cross-linked Polystyrene (XPS) microspheres containing one or two lithium sulfonamide moieties. The SPE containing Li:O mole ratio of 1:8 displayed excellent ionic conductivity (in excess of 10-4S/cm at 25ºC) and good electrochemical stability (4.3 volts versus Li/Li+). Thermal properties of these SPEs have also been investigated with Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). These new SPEs possess amorphous character with a glass Transition Temperature (Tg) around 135ºC, and no significant thermal decomposition until 420ºC. Synthesis and characterization including surface morphologies of these SPEs are described.

Holey graphene oxide as filler to improve electrochemical performance of solid polymer electrolytes

2019 ◽  
Vol 9 (9) ◽  
pp. 1055-1061
Author(s):  
Qi Wang ◽  
Zhoujie Zhang ◽  
Fei Shen ◽  
Bin Zhao ◽  
Xiaogang Han
Keyword(s):  
Graphene Oxide ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Solid Polymer Electrolytes ◽  
Cycle Performance ◽  
Solid Polymer ◽  
Electrochemical Window ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solid polymer electrolytes (SPE) have attracted wide attention of researchers because of their high safety performance and high mechanical strength. In this paper, holey graphene oxide (HGO) was added to poly(ethylene oxide) (PEO) solid polymer electrolytes with lithium bis(trifluoromethane sulfonimide) (LiTFSI) as salt to improve the ionic conductivity of solid polymer electrolytes. It was shown that the addition of holey graphene oxide improved the electrochemical window and ionic conductivity. When the amount of holey graphene oxide was 0 wt%, the ionic conductivity was 2.06 × 10–4 S/cm at 60 °C. In comparison, when the amount of holey graphene oxide was 0.2 wt%, the ionic conductivity was greatly increased to 6.05 × 10–4 S/cm. This was mainly due to the fact that addition of holey graphene oxide reduced the crystallization of polymer and promoted the migration of lithium ion. Meanwhile, the electrochemical window was expanded to 5.2 V and the cycle performance for the batteries was also improved.

Low-viscosity ionic liquid–doped solid polymer electrolytes

2018 ◽  
Vol 30 (8) ◽  
pp. 986-992 ◽  
Author(s):  
Sandhya Gupta ◽  
Pramod K Singh ◽  
B Bhattacharya
Keyword(s):  
Ionic Liquid ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Scanning Calorimetry ◽  
Low Viscosity ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Polymer electrolyte films based on poly(ethylene oxide) doped with salt sodium nitrate and ionic liquid (IL; 1-ethyl 3-methylimidazolium thiocyanate) have been prepared and characterized by differential scanning calorimetry (DSC) and impedance spectroscopy. The relative percentage of crystallinity of polymer electrolytes has been calculated by using DSC thermograms and electrical properties by using impedance spectroscopy. The incorporation of IL in polymer matrix increases the conductivity of polymer electrolyte. The maximum value of ionic conductivity of polymer electrolyte is found to be 1.93 × 10−4 S m−1 with 9 wt% IL.

scholarly journals Ion Coordination and Transport in Magnesium Polymer Electrolytes Based on Polyester-co-Polycarbonate

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Bumjun Park ◽  
Rassmus Andersson ◽  
Sarah G. Pate ◽  
Jiacheng Liu ◽  
Casey P. O’Brien ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Complex Form ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Transport Numbers ◽  
Trimethylene Carbonate ◽  
Poly Ethylene Oxide ◽  
Cation Coordination ◽  
Ion Conducting ◽  
Poly Ethylene

Magnesium-ion-conducting solid polymer electrolytes have been studied for rechargeable Mg metal batteries, one of the beyond-Li-ion systems. In this paper, magnesium polymer electrolytes with magnesium bis(trifluoromethane)sulfonimide (Mg(TFSI)2) salt in poly(ε-caprolactone-co-trimethylene carbonate) (PCL-PTMC) were investigated and compared with the poly(ethylene oxide) (PEO) analogs. Both thermal properties and vibrational spectroscopy indicated that the total ion conduction in the PEO electrolytes was dominated by the anion conduction due to strong polymer coordination with fully dissociated Mg2+. On the other hand, in PCL-PTMC electrolytes, there is relatively weaker polymer–cation coordination and increased anion–cation coordination. Sporadic Mg- and F-rich particles were observed on the Cu electrodes after polarization tests in Cu|Mg cells with PCL-PTMC electrolyte, suggesting that Mg was conducted in the ion complex form (MgxTFSIy) to the copper working electrode to be reduced which resulted in anion decomposition. However, the Mg metal deposition/stripping was not favorable with either Mg(TFSI)2 in PCL-PTMC or Mg(TFSI)2 in PEO, which inhibited quantitative analysis of magnesium conduction. A remaining challenge is thus to accurately assess transport numbers in these systems.

Effect of nanostructured Al2O3 on poly(ethylene oxide)-based solid polymer electrolytes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Patrick Walke ◽  
Anna Kirchberger ◽  
Felix Reiter ◽  
Daniel Esken ◽  
Tom Nilges
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Standard Material ◽  
Poly Ethylene Oxide ◽  
Standard Composition ◽  
Ion Conducting ◽  
Poly Ethylene

Abstract In this study, we investigated the effect of nanostructured Al2O3 particles on Li ion conducting, poly(ethylene oxide) (PEO)-based membranes prepared by electrospinning, solution casting and hot pressing. Pure PEO:LiBF4 solid polymer electrolytes (SPEs) and also plasticizer containing membranes were investigated with various amounts of Al2O3. In a first step, the best-performing composition of pure PEO:LiBF4 concerning the resulting ionic conductivity was identified and used as a standard for further experiments. In the following, the influence of the preparation method, the nature of the Al2O3, and the type of the plasticizer additives on the thermal and electrochemical properties for this standard composition were investigated. The Al2O3 composition was varied between 1 and 5 wt%. The ionic conductivity of bare electrospun PEO:LiBF4 SPE standard material has been improved by a factor ten to 1.9 × 10−6 S cm−1 at T = 293 K when 5 wt% of Al2O3 is added. For solution-casted PEO:LiBF4 standard compositions 18:1 with an initial ionic conductivity of 6.7 × 10−8 S cm−1, the addition of 2 wt% Al2O3 increased the performance to 1.4 × 10−7 S cm−1, both at T = 293 K. If succinonitrile and Al2O3 was admixed to the solution casted standard material, the ionic conductivity was further increased to reach 5.5 × 10−5 S cm−1 at T = 293 K. This material with a composition of 18:3:1 + 2 wt% Al2O3, outperforms the standard material by three orders of magnitude.

Solid polymer electrolytes based on statistical poly (ethylene oxide-propylene oxide) copolymers

1995 ◽  
Vol 40 (13-14) ◽  
pp. 2295-2299 ◽  
Author(s):  
X. Andrieu ◽  
J.F. Fauvarque ◽  
A. Goux ◽  
T. Hamaide ◽  
R. M'hamdi ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
Sign in / Sign up

Export Citation Format

Share Document