Tortuosity Effects in Garnet-Type Li7La3Zr2O12 Solid Electrolytes
Journal Article
·
· ACS Applied Materials and Interfaces
- Vanderbilt Univ., Nashville, TN (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
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 Li7La3Zr2O12 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. Here, the alignment or elimination of pores within an electrolyte or composite cathode may provide a means or achieving higher critical current densities and higher power densities in all solid-state batteries.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1495002
- Alternate ID(s):
- OSTI ID: 1494764
- Report Number(s):
- BNL--211263-2019-JAAM
- Journal Information:
- ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 2 Vol. 11; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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