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Updated: Jan 31, 2026
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Tortuosity Effects in Garnet-Type Li7La3Zr2O12 Solid Electrolytes.
Marm B Dixit, Matthew Regala, Fengyu Shen
1National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States.
ACS Applied Materials & Interfaces
|December 19, 2018
Summary
Pores in solid electrolytes like garnet-type Li7La3Zr2O12 increase tortuosity, hindering ion transport. Optimizing pore structure is key for higher critical current densities in solid-state batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Ionics
Background:
- Microstructure features like pores influence ion transport in solid conductors.
- Lithium-deficient/excess regions accelerate degradation, impacting battery performance and lifespan.
Purpose of the Study:
- To evaluate the impact of pores on tortuosity in garnet-type Li7La3Zr2O12 solid electrolytes.
- To understand how sintering temperature affects electrolyte microstructure and tortuosity.
Main Methods:
- Utilized synchrotron X-ray tomography for 3D microstructural reconstructions.
- Analyzed electrolytes sintered at temperatures ranging from 1050 to 1150 °C.
Main Results:
- Tortuosity magnitude and directional anisotropy increase with sintering temperature.
- Higher sintering temperatures lead to increased electrolyte tortuosity.
- Electrolytes with anisotropic tortuosity exhibit lower critical current densities.
Conclusions:
- Pore structure significantly affects tortuosity and ion transport in solid electrolytes.
- Controlling or eliminating pores can enhance critical current densities.
- Optimizing pore alignment is crucial for improving power density in all-solid-state batteries.
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