Effect of Pore Connectivity on Li Dendrite Propagation within LLZO Electrolytes Observed with Synchrotron X-ray Tomography
Abstract
Li7La3Zr2O12 (LLZO) is a garnet type material that demonstrates promising characteristics for all solid-state battery applications due to its high Li-ion conductivity and its compatibility with Li metal. The primary limitation of LLZO is the propensity for short-circuiting at low current densities. Microstructure features such as grain boundaries, pore character, and density all contribute to this shorting phenomenon. Toward the goal of understanding structure-processing relationships for practical design of solid electrolytes, the present study tracks structural transformations in solid electrolytes processed at three different temperatures (1000, 1050 and 1150 °C) using synchrotron x-ray tomography. A sub volume of 300 μm3 captures the heterogeneity of the solid electrolyte microstructure while minimizing the computational intensity associated with 3D reconstructions. While the porosity decreases with increasing temperature, the underlying connectivity of the pore region increases. In conclusion, solid electrolytes with interconnected pores short circuit at lower critical current densities than samples with less connected pores.
- Authors:
-
[4]
- Vanderbilt Univ., Nashville, TN (United States). Interdisciplinary Dept. of Material Science; Vanderbilt Univ., Nashville, TN (United States). Dept. of Mechanical Engineering
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Mechanical Engineering
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-ray Science Division
- Vanderbilt Univ., Nashville, TN (United States). Interdisciplinary Dept. of Material Science; Vanderbilt Univ., Nashville, TN (United States). Dept. of Mechanical Engineering; Vanderbilt Univ., Nashville, TN (United States). Dept. of Chemical and Biomolecular Engineering
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1475558
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 4; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Shen, Fengyu, Dixit, Marm B., Xiao, Xianghui, and Hatzell, Kelsey B. Effect of Pore Connectivity on Li Dendrite Propagation within LLZO Electrolytes Observed with Synchrotron X-ray Tomography. United States: N. p., 2018.
Web. doi:10.1021/acsenergylett.8b00249.
Shen, Fengyu, Dixit, Marm B., Xiao, Xianghui, & Hatzell, Kelsey B. Effect of Pore Connectivity on Li Dendrite Propagation within LLZO Electrolytes Observed with Synchrotron X-ray Tomography. United States. https://doi.org/10.1021/acsenergylett.8b00249
Shen, Fengyu, Dixit, Marm B., Xiao, Xianghui, and Hatzell, Kelsey B. Fri .
"Effect of Pore Connectivity on Li Dendrite Propagation within LLZO Electrolytes Observed with Synchrotron X-ray Tomography". United States. https://doi.org/10.1021/acsenergylett.8b00249. https://www.osti.gov/servlets/purl/1475558.
@article{osti_1475558,
title = {Effect of Pore Connectivity on Li Dendrite Propagation within LLZO Electrolytes Observed with Synchrotron X-ray Tomography},
author = {Shen, Fengyu and Dixit, Marm B. and Xiao, Xianghui and Hatzell, Kelsey B.},
abstractNote = {Li7La3Zr2O12 (LLZO) is a garnet type material that demonstrates promising characteristics for all solid-state battery applications due to its high Li-ion conductivity and its compatibility with Li metal. The primary limitation of LLZO is the propensity for short-circuiting at low current densities. Microstructure features such as grain boundaries, pore character, and density all contribute to this shorting phenomenon. Toward the goal of understanding structure-processing relationships for practical design of solid electrolytes, the present study tracks structural transformations in solid electrolytes processed at three different temperatures (1000, 1050 and 1150 °C) using synchrotron x-ray tomography. A sub volume of 300 μm3 captures the heterogeneity of the solid electrolyte microstructure while minimizing the computational intensity associated with 3D reconstructions. While the porosity decreases with increasing temperature, the underlying connectivity of the pore region increases. In conclusion, solid electrolytes with interconnected pores short circuit at lower critical current densities than samples with less connected pores.},
doi = {10.1021/acsenergylett.8b00249},
journal = {ACS Energy Letters},
number = 4,
volume = 3,
place = {United States},
year = {Fri Mar 30 00:00:00 EDT 2018},
month = {Fri Mar 30 00:00:00 EDT 2018}
}
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