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

A. Robertson; A. R. West

doi:10.1016/0167-2738(92)90140-K

Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li₄GeO₄-Li_2.5Ga_0.5GeO₄

A. Robertson^*, A. R. West

^*Corresponding author for this work

Research output: Contribution to journal › Article

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 Li_2.5Ga_0.5GeO₄. The phase diagram for the join Li₄GeO₄-Li_2.5Ga_0.5GeO₄ is presented together with lattice parameter data on the γ solid solution, a new phase β-Li_2.5Ga_0.5GeO₄ and an ordered γ phase, c-Li_2.8Ga_0.4GeO₄. 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 Li_3.7Ga_0.1GeO₄.

Original language	English
Pages (from-to)	351-358
Number of pages	8
Journal	Solid State Ionics
Volume	58
Issue number	3-4
DOIs	https://doi.org/10.1016/0167-2738(92)90140-K
Publication status	Published - Dec 1992
Externally published	Yes

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Robertson, A., & West, A. R. (1992). Phase equilibria, crystal chemistry and ionic conductivity in the LISICON system Li₄GeO₄-Li_2.5Ga_0.5GeO₄. Solid State Ionics, 58(3-4), 351-358. https://doi.org/10.1016/0167-2738(92)90140-K

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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.",

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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

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