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

doi:10.1016/j.electacta.2016.05.022

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

School of Chemistry

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	71-79
Number of pages	9
Journal	Electrochimica Acta
Volume	208
DOIs	https://doi.org/10.1016/j.electacta.2016.05.022
State	Published - 1 Aug 2016

Funding

Funders	Funder number
Office of Naval Research
Seventh Framework Programme
Not added	609201
Israel Science Foundation	2797/11
Engineering and Physical Sciences Research Council	EP/M009521/1

Keywords

composite solid electrolyte
grain boundaries
ion transport

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10.1016/j.electacta.2016.05.022

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title = "Peculiarities of ion transport in confined-in-ceramics concentrated polymer electrolytes",

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.",

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AU - Blanga, R.

AU - Berman, M.

AU - Biton, M.

AU - Tariq, F.

AU - Yufit, V.

AU - Gladkich, A.

AU - Greenbaum, S. G.

AU - Brandon, N.

AU - Golodnitsky, D.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - 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.

AB - 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.

KW - composite solid electrolyte

KW - grain boundaries

KW - ion transport

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

Abstract

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Keywords

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