Luminescence of polymer electrolytes containing europium (III)

1995 ◽  
Vol 10 (1) ◽  
pp. 202-210 ◽  
Author(s):  
L.D. Carlos ◽  
M. Assunção ◽  
L. Alcácer
Keyword(s):  
Polymer Electrolytes ◽  
Morphological Changes ◽  
Emission Spectra ◽  
Emission Lines ◽  
Hypersensitive Transition ◽  
Polymeric Matrices ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Europium Concentration

The excitation and emission spectra of polymeric matrices—poly(ethylene oxide), PEO, and poly(propylene oxide), PPO—containing different concentrations of EuBr3 were recorded and most of the observed transitions identified. The Stark components of the 7F0−4, 5D0 levels and the corresponding barycenters were calculated based on the emission lines assignment to the 5D0,1 → 7F0−4 transitions. The spectra were discussed in terms of a C2v local Eu3+ coordination. The relative intensity of the 5D0 → 7F2 hypersensitive transition was related to the electrolyte morphological changes due to increasing europium concentration.

scholarly journals Realizing poly(ethylene oxide) as a polymer for solid electrolytes in high voltage lithium batteries via simple modification of the cell setup

2021 ◽  
Author(s):  
Lukas Stolz ◽  
Gerrit Homann ◽  
Martin Winter ◽  
Johannes Kasnatscheew
Keyword(s):  
Ethylene Oxide ◽  
High Voltage ◽  
Lithium Batteries ◽  
Polymer Electrolytes ◽  
Solid Electrolytes ◽  
Simple Modification ◽  
Poly Ethylene Oxide ◽  
Benchmark System ◽  
Short Circuits ◽  
Poly Ethylene

Cell failure of polymer electrolytes is rather the result of short circuits instead of assumed electrolyte oxidation. A spacer with a constant and defined distance can avoid this failure, thus realize a benchmark system for a more systematic R&D.

scholarly journals Synthesis and Use of Zwitterion Bearing Sulfonyl(trifluoromethane sylfonyl)imide Anion as Additive for Polymer Electrolytes

2020 ◽  
Vol 10 (21) ◽  
pp. 7724
Author(s):  
Elisabetta Fedeli ◽  
Andriy Kvasha ◽  
Didier Gigmes ◽  
Trang N. T. Phan
Keyword(s):  
Transition Temperature ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer ◽  
Electrolyte Mixtures ◽  
Poly Ethylene Glycol ◽  
Imidazolium Cation ◽  
Ethylene Glycol Dimethyl Ether ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

In order to improve the electrochemical properties of poly(ethylene oxide), a well-known-solid polymer electrolyte, by adding zwitterion molecules, the synthesis of a new zwitterion (ZN) having imidazolium cation and sulfonyl(trifluoromethane sulfonyl)imide anion is investigated. The addition of different amounts of ZN to the mixture of lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) and poly(ethylene glycol)dimethyl ether (PEGDM) of 1000 g mol−1 does not significantly affect the transition temperature of PEGDM but causes a slight decrease in ionic conductivity of the electrolyte mixtures. However, even with the presence of only 0.05 mole fraction of ZN, the anodic stability of LiTFSI/PEGDM based electrolytes is improved to over 4.5 V vs. Li+/Li at 25 °C. This makes the new synthesized zwitterion a promising electrolyte’s additive for high voltage batteries.

Lithium-7 NMR study of polymer electrolytes based on composites of poly[bis((methoxyethoxy)ethoxy)phosphazene] and poly(ethylene oxide)

1991 ◽  
Vol 3 (3) ◽  
pp. 534-538 ◽  
Author(s):  
K. J. Adamic ◽  
S. G. Greenbaum ◽  
K. M. Abraham ◽  
M. Alamgir ◽  
M. C. Wintersgill ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Polymer Electrolytes ◽  
Nmr Study ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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