Bulk and interfacial ionic conduction in LiI/Al2O3 mixtures

Gilat Ardel; Dina Golodnitsky; Emanuel Peled; Yifeng Wang; Gang Wang; Stanley Bajue; Steven Greenbaum

doi:10.1016/s0167-2738(98)00313-0

Bulk and interfacial ionic conduction in LiI/Al₂O₃ mixtures

Gilat Ardel, Dina Golodnitsky, Emanuel Peled, Yifeng Wang, Gang Wang, Stanley Bajue, Steven Greenbaum^*

^*Corresponding author for this work

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied physical mixtures of LiI and nanoscale particles of Al₂O₃, prepared in pellet form under pressure, by X-ray diffraction, complex impedance, and wide-line ⁷Li and ¹²⁷I and high resolution ⁷Li NMR spectroscopy. Enhancement in ionic conductivity by the addition of Al₂O₃ is observed, although there is also an increase in grain boundary resistance. The high resolution (MAS) NMR method clearly resolves two or more distinct Li⁺ sites, one characteristic of bulk LiI and the rest associated with surface/interface regions. The site populations depend strongly on mix composition and temperature, and are correlated with the ionic conductivity behavior.

Original language	English
Pages (from-to)	477-485
Number of pages	9
Journal	Solid State Ionics
Volume	113-115
DOIs	https://doi.org/10.1016/s0167-2738(98)00313-0
State	Published - 1 Dec 1998

Keywords

Complex impedance
Interfacial effects
Lithium iodide
Lithium-7 NMR
Nano-crystalline alumina

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10.1016/s0167-2738(98)00313-0

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title = "Bulk and interfacial ionic conduction in LiI/Al2O3 mixtures",

abstract = "We have studied physical mixtures of LiI and nanoscale particles of Al2O3, prepared in pellet form under pressure, by X-ray diffraction, complex impedance, and wide-line 7Li and 127I and high resolution 7Li NMR spectroscopy. Enhancement in ionic conductivity by the addition of Al2O3 is observed, although there is also an increase in grain boundary resistance. The high resolution (MAS) NMR method clearly resolves two or more distinct Li+ sites, one characteristic of bulk LiI and the rest associated with surface/interface regions. The site populations depend strongly on mix composition and temperature, and are correlated with the ionic conductivity behavior.",

keywords = "Complex impedance, Interfacial effects, Lithium iodide, Lithium-7 NMR, Nano-crystalline alumina",

author = "Gilat Ardel and Dina Golodnitsky and Emanuel Peled and Yifeng Wang and Gang Wang and Stanley Bajue and Steven Greenbaum",

note = "Funding Information: This work was supported by grants from the Israel Ministry of Defense, the U.S. Air Force Office of Scientific Research, the U.S. Department of Energy, the U.S. Office of Naval Research, and the National Aeronautics and Space Administration (through the NASA/JOVE Program). One of the authors (SG) acknowledges the National Research Council for Sabbatical Leave support at the Jet Propulsion Laboratory.",

year = "1998",

month = dec,

day = "1",

doi = "10.1016/s0167-2738(98)00313-0",

language = "אנגלית",

volume = "113-115",

pages = "477--485",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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TY - JOUR

T1 - Bulk and interfacial ionic conduction in LiI/Al2O3 mixtures

AU - Ardel, Gilat

AU - Golodnitsky, Dina

AU - Peled, Emanuel

AU - Wang, Yifeng

AU - Wang, Gang

AU - Bajue, Stanley

AU - Greenbaum, Steven

N1 - Funding Information: This work was supported by grants from the Israel Ministry of Defense, the U.S. Air Force Office of Scientific Research, the U.S. Department of Energy, the U.S. Office of Naval Research, and the National Aeronautics and Space Administration (through the NASA/JOVE Program). One of the authors (SG) acknowledges the National Research Council for Sabbatical Leave support at the Jet Propulsion Laboratory.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - We have studied physical mixtures of LiI and nanoscale particles of Al2O3, prepared in pellet form under pressure, by X-ray diffraction, complex impedance, and wide-line 7Li and 127I and high resolution 7Li NMR spectroscopy. Enhancement in ionic conductivity by the addition of Al2O3 is observed, although there is also an increase in grain boundary resistance. The high resolution (MAS) NMR method clearly resolves two or more distinct Li+ sites, one characteristic of bulk LiI and the rest associated with surface/interface regions. The site populations depend strongly on mix composition and temperature, and are correlated with the ionic conductivity behavior.

AB - We have studied physical mixtures of LiI and nanoscale particles of Al2O3, prepared in pellet form under pressure, by X-ray diffraction, complex impedance, and wide-line 7Li and 127I and high resolution 7Li NMR spectroscopy. Enhancement in ionic conductivity by the addition of Al2O3 is observed, although there is also an increase in grain boundary resistance. The high resolution (MAS) NMR method clearly resolves two or more distinct Li+ sites, one characteristic of bulk LiI and the rest associated with surface/interface regions. The site populations depend strongly on mix composition and temperature, and are correlated with the ionic conductivity behavior.

KW - Complex impedance

KW - Interfacial effects

KW - Lithium iodide

KW - Lithium-7 NMR

KW - Nano-crystalline alumina

UR - http://www.scopus.com/inward/record.url?scp=0032320649&partnerID=8YFLogxK

U2 - 10.1016/s0167-2738(98)00313-0

DO - 10.1016/s0167-2738(98)00313-0

M3 - מאמר

AN - SCOPUS:0032320649

VL - 113-115

SP - 477

EP - 485

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

ER -

Bulk and interfacial ionic conduction in LiI/Al₂O₃ mixtures

Abstract

Keywords

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