2012
DOI: 10.1021/ma3014405
|View full text |Cite
|
Sign up to set email alerts
|

Correlations of Ion Motion and Chain Motion in Salt-in-Polysiloxane-g-oligoether Electrolytes

Abstract: The transport properties of salt and chains in a salt-in-polymer electrolyte consisting of polysiloxane-g-oligoether with different concentrations of lithium triflate, LiSO3CF3, are investigated. Temperature-dependent impedance spectroscopy, viscosity, and multinuclear self-diffusion NMR characterize the mobility of the chains and the different salt species, i.e., ion pairs or single ions. Comparison of different transport parameters allows conclusions about the motions of different species and correlations be… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
16
0

Year Published

2013
2013
2020
2020

Publication Types

Select...
8

Relationship

3
5

Authors

Journals

citations
Cited by 17 publications
(16 citation statements)
references
References 51 publications
(103 reference statements)
0
16
0
Order By: Relevance
“…According to this mechanism, beyond the dispersive regime, the observed constancy in the crossover angular frequency causes the non-Arrhenius behavior of the dc conductivity. According to this model, the dc conductivity, σ dc , is expressed by the following expression where α and γ are the pre-exponential factors and E * is the elementary displacive step activation energy. Figure shows a comparative study between VTF and MIGRATION-based concepts for PEO 20 –LiCF 3 SO 3 –8 wt % TiO 2 PNCE composition.…”
Section: Resultsmentioning
confidence: 99%
“…According to this mechanism, beyond the dispersive regime, the observed constancy in the crossover angular frequency causes the non-Arrhenius behavior of the dc conductivity. According to this model, the dc conductivity, σ dc , is expressed by the following expression where α and γ are the pre-exponential factors and E * is the elementary displacive step activation energy. Figure shows a comparative study between VTF and MIGRATION-based concepts for PEO 20 –LiCF 3 SO 3 –8 wt % TiO 2 PNCE composition.…”
Section: Resultsmentioning
confidence: 99%
“…Assuming validity of the Nernst–Einstein equation, transference numbers and thus the contributions of particular ion species to the conductivity can be determined . In concentrated electrolytes, however, ion correlations such as ion pair formation may play a large role, as shown for a range of different systems . In that case, the information content of diffusion coefficients is limited, and an interpretation in terms of single ions, pairs, or clusters requires complex models …”
Section: Introductionmentioning
confidence: 99%
“…This situation leads to a strong correlation between the mobility of Li or Na and the motion of the polymer segments. 21 By contrast, the anions are not directly bound to the polymer, so that they commonly exhibit a higher diffusivity than the cations in classical SPE systems, such as PEO−NaI. 7,22,23 In PEO−IL systems, however, the bulky organic cations only weakly coordinate to the polymer.…”
Section: Discussionmentioning
confidence: 99%
“…Surveying the literature on polymer electrolytes, it has been established that small alkali-metal cations, such as Li and Na, form strong coordinative bonds with the oxygen atoms in the PEO chains. , As a result, the conformational freedom of the polymer is constrained, which is reflected by an increase of T g . This situation leads to a strong correlation between the mobility of Li or Na and the motion of the polymer segments . By contrast, the anions are not directly bound to the polymer, so that they commonly exhibit a higher diffusivity than the cations in classical SPE systems, such as PEO–NaI. ,, …”
Section: Discussionmentioning
confidence: 99%