Thermal expansion in the garnet-type solid electrolyte (Li 7 - x Al x /3 )La 3 Zr 2 O 12 as a function of Al content

Journal Article · Tue Sep 01 00:00:00 EDT 2015 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2015.05.067· OSTI ID:1392010

Hubaud, Aude A.; Schroeder, David J.; Ingram, Brian J.; Okasinski, John S.; Vaughey, John T.

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 °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 × 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Joint Center for Energy Storage Research (JCESR)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1392010
• Journal Information: Journal of Alloys and Compounds, Vol. 644, Issue C; ISSN 0925-8388
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
lithium ion battery
solid electrolyte
thermal expansion
garnet