Tortuosity Effects in Garnet-Type Li                         7                         La                         3                         Zr                         2                         O                         12                          Solid Electrolytes

Marm B. Dixit; Matthew Regala; Fengyu Shen; Xianghui Xiao; Kelsey B. Hatzell

doi:10.1021/acsami.8b16536

Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes

Marm B. Dixit, Matthew Regala, Fengyu Shen, Xianghui Xiao, Kelsey B. Hatzell

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

84 Scopus citations

Abstract

Intrinsic material microstructure features, such as pores or void spaces, grains, and defects can affect local lithium-ion concentration profiles and transport properties in solid ion conductors. The formation of lithium-deficient or -excess regions can accelerate degradation phenomena, such as dendrite formation, lithium plating, and electrode/electrolyte delamination. This paper evaluates the effects pores or void spaces have on the tortuosity of a garnet-type Li ₇ La ₃ Zr ₂ O ₁₂ solid electrolyte. Synchrotron X-ray tomography is used to obtain three-dimensional reconstructions of different electrolytes sintered at temperatures between 1050 and 1150 °C. The magnitude of the electrolyte tortuosity and the tortuosity directional anisotropy is shown to increase with sintering temperature. Electrolytes with highly anisometric tortuosity have lower critical current densities. Alignment or elimination of pores within an electrolyte or composite cathode may provide a means for achieving higher critical current densities and higher power densities in all solid-state batteries.

Original language	English
Pages (from-to)	2022-2030
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	2
DOIs	https://doi.org/10.1021/acsami.8b16536
State	Published - Jan 16 2019
Externally published	Yes

Funding

The authors were supported by the National Science Foundation under grant No. 1727863. The authors acknowl- edge the Vanderbilt Institute of Nanoscience and Engineering (VINSE) for access to their shared characterization facilities. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. This research used resources of the National Synchrotron Light Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-AC02-98CH10886.

Funders	Funder number
DOE Office of Science
National Science Foundation	1727863
U.S. Department of Energy
Office of Science
Argonne National Laboratory
Brookhaven National Laboratory

Keywords

microstructure
solid electrolyte
tomography
tortuosity
transport

UN SDGs

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

Access to Document

10.1021/acsami.8b16536

Cite this

Dixit, M. B., Regala, M., Shen, F., Xiao, X., & Hatzell, K. B. (2019). Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes ACS Applied Materials and Interfaces, 11(2), 2022-2030. https://doi.org/10.1021/acsami.8b16536

Dixit, Marm B. ; Regala, Matthew ; Shen, Fengyu et al. / Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes In: ACS Applied Materials and Interfaces. 2019 ; Vol. 11, No. 2. pp. 2022-2030.

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abstract = " Intrinsic material microstructure features, such as pores or void spaces, grains, and defects can affect local lithium-ion concentration profiles and transport properties in solid ion conductors. The formation of lithium-deficient or -excess regions can accelerate degradation phenomena, such as dendrite formation, lithium plating, and electrode/electrolyte delamination. This paper evaluates the effects pores or void spaces have on the tortuosity of a garnet-type Li 7 La 3 Zr 2 O 12 solid electrolyte. Synchrotron X-ray tomography is used to obtain three-dimensional reconstructions of different electrolytes sintered at temperatures between 1050 and 1150 °C. The magnitude of the electrolyte tortuosity and the tortuosity directional anisotropy is shown to increase with sintering temperature. Electrolytes with highly anisometric tortuosity have lower critical current densities. Alignment or elimination of pores within an electrolyte or composite cathode may provide a means for achieving higher critical current densities and higher power densities in all solid-state batteries.",

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Dixit, MB, Regala, M, Shen, F, Xiao, X & Hatzell, KB 2019, ' Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes ', ACS Applied Materials and Interfaces, vol. 11, no. 2, pp. 2022-2030. https://doi.org/10.1021/acsami.8b16536

Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes . / Dixit, Marm B.; Regala, Matthew; Shen, Fengyu et al.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 2, 16.01.2019, p. 2022-2030.

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

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Dixit MB, Regala M, Shen F, Xiao X, Hatzell KB. Tortuosity Effects in Garnet-Type Li ₇ La ₃ Zr ₂ O ₁₂ Solid Electrolytes ACS Applied Materials and Interfaces. 2019 Jan 16;11(2):2022-2030. doi: 10.1021/acsami.8b16536