Peculiarities of ion transport in confined-in-ceramics concentrated polymer electrolytes

R. Blanga, M. Berman, M. Biton, F. Tariq, V. Yufit, A. Gladkich, S. G. Greenbaum, N. Brandon, D. Golodnitsky*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Polyethylene-oxide/lithium-aluminate films were deposited by electrophoretic deposition. Films impregnated with lithium iodide formed highly concentrated polymer-in-ceramic solid electrolytes. Solid-state NMR, FIB-SEM tomography with modelling, and EIS studies showed that only a few percent of the interfacial lithium in the sample is capable of inducing a fast ion-migration path in the system. We suggest that despite suppressed crystallinity of PEO confined in ceramics the ion transport in the polymer medium impedes the total conductivity of the composite electrolyte at near-ambient temperatures. After melting of the polymer and its complexes, the interfacial conduction through perpendicular LiAlO2/LiI grain boundaries becomes feasible. This, together with ion transport via molten, confined polymer electrolyte is followed by the increase of the overall conductivity of the composite system.

Original languageEnglish
Pages (from-to)71-79
Number of pages9
JournalElectrochimica Acta
Volume208
DOIs
StatePublished - 1 Aug 2016

Funding

FundersFunder number
Office of Naval Research
Engineering and Physical Sciences Research CouncilEP/M009521/1
Israel Science Foundation2797/11
Seventh Framework Programme

    Keywords

    • composite solid electrolyte
    • grain boundaries
    • ion transport

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