Electrical conductivity of poly(ethylene oxide)—alkali metal salt systems and effects of mixed salts and mixed molecular weights

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

“…In the present work, T m of pure PEO was 72°C and was reasonably close to the value reported by Appetecchi et al [26]. The glass transition temperature of PEO (4×10 6 ) was reported by Jerold and Wanchart as −60°C [43].…”

Biodegradable Materials for Multilayer Transient Printed Circuit Boards

“…The increases in conductivity with weight of PEO (Figure 3 i) may be explained by increases in the coverage of W particles with PEO and its ionic conductivity. The methanol can react with the W and surface oxide [ 37,38 ] to form solid electrolytes with PEO, [39][40][41] in a way that may facilitate ionic conduction between W particles. Impedance measurements of cured pastes with various PEO content (from 1.5 to 2.5g) using an impedance analyzer (from 1 MHz to 1.8 GHz) ( Figure S4a and S4b) and a RLC meter (from 20 Hz to 1 MHz) ( Figure S4c and S4d) confi rm that increasing the PEO contents reduces the impedance at low frequency (20 Hz to 300 MHz).…”

Semi-interpenetrating polymer networks as solid polymer electrolytes: Effects of ion-dissociation, crosslink density and oligomeric entanglements on the conductivity behavior in poly(ethylene oxide)–polyurethane/poly(acrylonitrile) matrix

“…To minimize the solvent evaporation, low molecular weight poly(ethylene glycols) have been used quite often as plasticizers as their low viscosity facilitates ion diffusion [28e34]. However, low molecular weight PEGs with hydroxyl end groups were found to be very reactive to lithium electrodes and forms a considerably high-impedance solid electrolyte interface (SEI) between the lithium electrode and the electrolyte, thus, adversely affecting the performance of the cell [45]. On these grounds, we have chosen a low molecular weight, nonvolatile, methoxy terminated nonreactive poly(ethylene glycol) dimethylether (PEGDME 500) as the oligomeric plasticizer for the present study.…”