Structure and lithium ion conductivity of bismuth containing lithium garnets Li5La3Bi2O12 and Li6SrLa2Bi2O12

Ramaswamy Murugan; Werner Weppner; Peter Schmid-Beurmann; Venkataraman Thangadurai

doi:10.1016/j.mseb.2007.07.009

Structure and lithium ion conductivity of bismuth containing lithium garnets Li₅La₃Bi₂O₁₂ and Li₆SrLa₂Bi₂O₁₂

Ramaswamy Murugan^*
, Werner Weppner
, Peter Schmid-Beurmann
, Venkataraman Thangadurai

^*Corresponding author for this work

School of Chemistry

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

Abstract

We report the synthesis, structure and transport properties of the new chemical compositions Li₅La₃Bi₂O₁₂ and Li₆SrLa₂Bi₂O₁₂. Qualitative phase analysis by X-ray powder diffraction patterns in combination with the Rietveld method revealed garnet type compounds as major phases. Whereas Li₅La₃Bi₂O₁₂ was found to be a single-phase material, BiLa₂O_4.5 could be identified as an impurity phase in the case of Li₆SrLa₂Bi₂O₁₂. Lithium ion conductivities of Li₅La₃Bi₂O₁₂ and Li₆SrLa₂Bi₂O₁₂ were studied by ac impedance method. The grain-boundary contribution to the total (bulk + grain-boundary) resistance is appreciable and amounts to about 54% and 61% for Li₅La₃Bi₂O₁₂ and Li₆SrLa₂Bi₂O₁₂, respectively, at 22 °C. Li₆SrLa₂Bi₂O₁₂ exhibits the highest total (bulk + grain-boundary) and bulk ionic conductivity of 2.0 × 10^-5 and 5.2 × 10^-5 S/cm, respectively, at 22 °C. The bismuth containing lithium garnet exhibits a maximum cubic lattice constant and the best lithium ion conductivity with low activation energy in the Li₅La₃M₂O₁₂ (M = Ta, Nb, Sb and Bi) series.

Original language	English
Pages (from-to)	14-20
Number of pages	7
Journal	Materials Science and Engineering: B
Volume	143
Issue number	1-3
DOIs	https://doi.org/10.1016/j.mseb.2007.07.009
Publication status	Published - 25 Oct 2007

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

ac conductivity
Garnet-like structure
Li ion conductivity
Lithium ion batteries
Solid-electrolyte

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@article{55afe5cc66f9444e9cd962073db9dc26,

title = "Structure and lithium ion conductivity of bismuth containing lithium garnets Li5La3Bi2O12 and Li6SrLa2Bi2O12",

abstract = "We report the synthesis, structure and transport properties of the new chemical compositions Li5La3Bi2O12 and Li6SrLa2Bi2O12. Qualitative phase analysis by X-ray powder diffraction patterns in combination with the Rietveld method revealed garnet type compounds as major phases. Whereas Li5La3Bi2O12 was found to be a single-phase material, BiLa2O4.5 could be identified as an impurity phase in the case of Li6SrLa2Bi2O12. Lithium ion conductivities of Li5La3Bi2O12 and Li6SrLa2Bi2O12 were studied by ac impedance method. The grain-boundary contribution to the total (bulk + grain-boundary) resistance is appreciable and amounts to about 54\% and 61\% for Li5La3Bi2O12 and Li6SrLa2Bi2O12, respectively, at 22 °C. Li6SrLa2Bi2O12 exhibits the highest total (bulk + grain-boundary) and bulk ionic conductivity of 2.0 × 10-5 and 5.2 × 10-5 S/cm, respectively, at 22 °C. The bismuth containing lithium garnet exhibits a maximum cubic lattice constant and the best lithium ion conductivity with low activation energy in the Li5La3M2O12 (M = Ta, Nb, Sb and Bi) series.",

keywords = "ac conductivity, Garnet-like structure, Li ion conductivity, Lithium ion batteries, Solid-electrolyte",

author = "Ramaswamy Murugan and Werner Weppner and Peter Schmid-Beurmann and Venkataraman Thangadurai",

year = "2007",

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doi = "10.1016/j.mseb.2007.07.009",

language = "English",

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journal = "Materials Science and Engineering: B",

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T1 - Structure and lithium ion conductivity of bismuth containing lithium garnets Li5La3Bi2O12 and Li6SrLa2Bi2O12

AU - Murugan, Ramaswamy

AU - Weppner, Werner

AU - Schmid-Beurmann, Peter

AU - Thangadurai, Venkataraman

PY - 2007/10/25

Y1 - 2007/10/25

N2 - We report the synthesis, structure and transport properties of the new chemical compositions Li5La3Bi2O12 and Li6SrLa2Bi2O12. Qualitative phase analysis by X-ray powder diffraction patterns in combination with the Rietveld method revealed garnet type compounds as major phases. Whereas Li5La3Bi2O12 was found to be a single-phase material, BiLa2O4.5 could be identified as an impurity phase in the case of Li6SrLa2Bi2O12. Lithium ion conductivities of Li5La3Bi2O12 and Li6SrLa2Bi2O12 were studied by ac impedance method. The grain-boundary contribution to the total (bulk + grain-boundary) resistance is appreciable and amounts to about 54% and 61% for Li5La3Bi2O12 and Li6SrLa2Bi2O12, respectively, at 22 °C. Li6SrLa2Bi2O12 exhibits the highest total (bulk + grain-boundary) and bulk ionic conductivity of 2.0 × 10-5 and 5.2 × 10-5 S/cm, respectively, at 22 °C. The bismuth containing lithium garnet exhibits a maximum cubic lattice constant and the best lithium ion conductivity with low activation energy in the Li5La3M2O12 (M = Ta, Nb, Sb and Bi) series.

AB - We report the synthesis, structure and transport properties of the new chemical compositions Li5La3Bi2O12 and Li6SrLa2Bi2O12. Qualitative phase analysis by X-ray powder diffraction patterns in combination with the Rietveld method revealed garnet type compounds as major phases. Whereas Li5La3Bi2O12 was found to be a single-phase material, BiLa2O4.5 could be identified as an impurity phase in the case of Li6SrLa2Bi2O12. Lithium ion conductivities of Li5La3Bi2O12 and Li6SrLa2Bi2O12 were studied by ac impedance method. The grain-boundary contribution to the total (bulk + grain-boundary) resistance is appreciable and amounts to about 54% and 61% for Li5La3Bi2O12 and Li6SrLa2Bi2O12, respectively, at 22 °C. Li6SrLa2Bi2O12 exhibits the highest total (bulk + grain-boundary) and bulk ionic conductivity of 2.0 × 10-5 and 5.2 × 10-5 S/cm, respectively, at 22 °C. The bismuth containing lithium garnet exhibits a maximum cubic lattice constant and the best lithium ion conductivity with low activation energy in the Li5La3M2O12 (M = Ta, Nb, Sb and Bi) series.

KW - ac conductivity

KW - Garnet-like structure

KW - Li ion conductivity

KW - Lithium ion batteries

KW - Solid-electrolyte

U2 - 10.1016/j.mseb.2007.07.009

DO - 10.1016/j.mseb.2007.07.009

M3 - Article

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SN - 0921-5107

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JO - Materials Science and Engineering: B

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