Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li4GeO4-Li2.5Ga0.5GeO4

A. Robertson*, A. R. West

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A range of high Li+ ion conductivity solid solutions with the γ-LISICON structure forms by the substitution mechanism 3Li⇄Ga. These extend from compositions close to, but not including, Li4GeO4 up to Li2.5Ga0.5GeO4. The phase diagram for the join Li4GeO4-Li2.5Ga0.5GeO4 is presented together with lattice parameter data on the γ solid solution, a new phase β-Li2.5Ga0.5GeO4 and an ordered γ phase, c-Li2.8Ga0.4GeO4. Conductivity Arrhenius plots are markedly non-linear. A linear region is observed below ∼260 °C in which the conductivity data depend on sample pretreatment. A high temperature curved region is seen in which the data are reversible on heating/cooling cycles. Conductivities reach a maximum at the approximate composition Li3.7Ga0.1GeO4.

Original languageEnglish
Pages (from-to)351-358
Number of pages8
JournalSolid State Ionics
Volume58
Issue number3-4
DOIs
Publication statusPublished - Dec 1992
Externally publishedYes

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Crystal chemistry
Ionic conductivity
Phase equilibria
ion currents
Solid solutions
chemistry
Arrhenius plots
conductivity
Chemical analysis
Lattice constants
Phase diagrams
crystals
Substitution reactions
solid solutions
Ions
Cooling
Heating
pretreatment
lattice parameters
plots

Cite this

@article{adf8b7eb69ba49de8ed00128b5ef7af8,
title = "Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li4GeO4-Li2.5Ga0.5GeO4",
abstract = "A range of high Li+ ion conductivity solid solutions with the γ-LISICON structure forms by the substitution mechanism 3Li⇄Ga. These extend from compositions close to, but not including, Li4GeO4 up to Li2.5Ga0.5GeO4. The phase diagram for the join Li4GeO4-Li2.5Ga0.5GeO4 is presented together with lattice parameter data on the γ solid solution, a new phase β-Li2.5Ga0.5GeO4 and an ordered γ phase, c-Li2.8Ga0.4GeO4. Conductivity Arrhenius plots are markedly non-linear. A linear region is observed below ∼260 °C in which the conductivity data depend on sample pretreatment. A high temperature curved region is seen in which the data are reversible on heating/cooling cycles. Conductivities reach a maximum at the approximate composition Li3.7Ga0.1GeO4.",
author = "A. Robertson and West, {A. R.}",
year = "1992",
month = "12",
doi = "10.1016/0167-2738(92)90140-K",
language = "English",
volume = "58",
pages = "351--358",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",
number = "3-4",

}

Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li4GeO4-Li2.5Ga0.5GeO4. / Robertson, A.; West, A. R.

In: Solid State Ionics, Vol. 58, No. 3-4, 12.1992, p. 351-358.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li4GeO4-Li2.5Ga0.5GeO4

AU - Robertson, A.

AU - West, A. R.

PY - 1992/12

Y1 - 1992/12

N2 - A range of high Li+ ion conductivity solid solutions with the γ-LISICON structure forms by the substitution mechanism 3Li⇄Ga. These extend from compositions close to, but not including, Li4GeO4 up to Li2.5Ga0.5GeO4. The phase diagram for the join Li4GeO4-Li2.5Ga0.5GeO4 is presented together with lattice parameter data on the γ solid solution, a new phase β-Li2.5Ga0.5GeO4 and an ordered γ phase, c-Li2.8Ga0.4GeO4. Conductivity Arrhenius plots are markedly non-linear. A linear region is observed below ∼260 °C in which the conductivity data depend on sample pretreatment. A high temperature curved region is seen in which the data are reversible on heating/cooling cycles. Conductivities reach a maximum at the approximate composition Li3.7Ga0.1GeO4.

AB - A range of high Li+ ion conductivity solid solutions with the γ-LISICON structure forms by the substitution mechanism 3Li⇄Ga. These extend from compositions close to, but not including, Li4GeO4 up to Li2.5Ga0.5GeO4. The phase diagram for the join Li4GeO4-Li2.5Ga0.5GeO4 is presented together with lattice parameter data on the γ solid solution, a new phase β-Li2.5Ga0.5GeO4 and an ordered γ phase, c-Li2.8Ga0.4GeO4. Conductivity Arrhenius plots are markedly non-linear. A linear region is observed below ∼260 °C in which the conductivity data depend on sample pretreatment. A high temperature curved region is seen in which the data are reversible on heating/cooling cycles. Conductivities reach a maximum at the approximate composition Li3.7Ga0.1GeO4.

U2 - 10.1016/0167-2738(92)90140-K

DO - 10.1016/0167-2738(92)90140-K

M3 - Article

VL - 58

SP - 351

EP - 358

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 3-4

ER -