On the ion association at low salt concentrations in polymer electrolytes; a Raman study of NaCF3SO3 and LiClO4 dissolved in poly(propylene oxide)

1991 ◽  
Vol 94 (9) ◽  
pp. 6296-6306 ◽  
Author(s):  
S. Schantz
Keyword(s):  
Propylene Oxide ◽  
Polymer Electrolytes ◽  
Ion Association ◽  
Low Salt ◽  
Raman Study ◽  
Poly Propylene

Facile Preparation of Anion Trapping Polymer Electrolytes by Reaction between 9-Borabicyclo[3.3.1]nonane (9-BBN) and Poly(propylene oxide)

2004 ◽  
Vol 33 (4) ◽  
pp. 396-397 ◽  
Author(s):  
Tomonobu Mizumo ◽  
Kenji Sakamoto ◽  
Noriyoshi Matsumi ◽  
Hiroyuki Ohno
Keyword(s):  
Propylene Oxide ◽  
Polymer Electrolytes ◽  
Facile Preparation ◽  
Poly Propylene

Ion Association in Polymer Electrolytes; A Raman Study of Poly (Propylene Oxide) Based Complexes

1988 ◽  
Vol 135 ◽  
Author(s):  
M. Kakihana ◽  
S. Schantz ◽  
L.M. Torell ◽  
L. Borjesson
Keyword(s):  
Salt Concentration ◽  
Ion Pairs ◽  
Ion Association ◽  
Major Effect ◽  
Polymer Complexes ◽  
Ion Interactions ◽  
Different Temperatures ◽  
Component Band ◽  
Raman Study ◽  
Poly Propylene

AbstractRaman spectra of a series of PPO-LiClO4 and PPO-NaCF3SO3 complexes have been obtained for different temperatures and salt concentrations to study the various ion associations of the dopant salt. It was found that ion-ion interactions dramatically influenced the internal symmetric stretching modes ν1 of the anions. Splitting of ν1 into a multicomponent band was observed. The intensity profile of the band was found to change rapidly with salt concentration and temperature. A three component band analysis led to the identification of dissociated ions, ion pairs and multiple ion aggregates, respectively. Increased ion association with increased temperature and/or salt concentration was observed for both LiCIO4- and NaCF3SO3- complexes. It is likely to initiate the phase separation and salt precipitation observed in many salt-polymer complexes at higher temperatures. Considerably stronger ion-ion interaction was observed in the NaCF3SO3-system than in the LiCIO4-complex, which may explain the lower conductivities reported for PPO-NaCF3SO3 electrolytes. The drastic conductivity drop observed in both systems at higher salt concentrations can however only partly be due to a decreased concentration of “free” ions, the major effect being attributed to decreased ion mobility.

Ion association effects and phase separation in poly(propylene oxide) modified poly(dimethylsiloxane) complexed with triflate salts

Polymer ◽  
1992 ◽  
Vol 33 (13) ◽  
pp. 2778-2783 ◽  
Author(s):  
P. Jacobsson ◽  
I. Albinsson ◽  
B.-E. Mellander ◽  
J.R. Stevens
Keyword(s):  
Phase Separation ◽  
Propylene Oxide ◽  
Ion Association ◽  
Poly Propylene
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