Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 644, Issue -, Pages 804-807Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.05.067
Keywords
Garnet; Solid electrolyte; Thermal expansion; Battery
Categories
Funding
- Joint Center for Energy Storage Research, an Energy Innovation Hub - U.S. Department of Energy, Office of Science, Basic Energy Sciences
- DOE [DE-AC02-06CH11357]
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The thermal expansion (TE) coefficients of the lithium-stable lithium-ion conducting garnet lithium lanthanum zirconium oxide (LLZ) and the effect of aluminum substitution were measured from room temperature up to 700 degrees C by a synchrotron-based X-ray diffraction. The typical TE value measured for the most reported composition (LLZ doped with 0.3 wt.% or 0.093 mol% aluminum) was 15.498 x 10(-6) K-1, which is approximately twice the value reported for other garnet-type structures. As the Al(III) concentration has been observed to strongly affect the structure observed and the ionic conductivity, we also assessed its role on thermal expansion and noted only a small variation with increasing dopant concentration. The materials implications for using LLZ in a solid state battery are discussed. (C) 2015 Published by Elsevier B.V.
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