Correlations of Ion Motion and Chain Motion in Salt in Polysiloxane g oligoether Electrolytes
   
Yazarlar (4)
Miriam Kunze
University Of Münster, Almanya
Prof. Dr. Yunus KARATAŞ Kırşehir Ahi Evran Üniversitesi, Türkiye
Hans-Dieter Wiemhöfer
University Of Münster, Almanya
Monika Schönhoff
University Of Münster, Almanya
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Macromolecules
Dergi ISSN 0024-9297 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SSCI
Makale Dili İngilizce Basım Tarihi 10-2012
Cilt / Sayı / Sayfa 45 / 20 / 8328–8335 DOI 10.1021/ma3014405
Makale Linki http://pubs.acs.org/doi/abs/10.1021/ma3014405
Özet
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 between them. For example, comparing diffusion coefficients and conductivities via the Nernst–Einstein equation, the fraction of undissociated ion pairs is concluded to be larger than 90%. Macroscopic and microscopic viscosities describe chain and small species motions, respectively. Distinct differences are observed between the temperature-dependence of the transport parameters of ion pairs, which is of Arrhenius …
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