Phase Content and Conductivity of Aluminum- and Tantalum-Doped Garnet-Type Lithium Lanthanum Zirconate Solid Electrolyte Materials

Thursday, 1 June 2017: 16:36
Grand Salon C - Section 13 (Hilton New Orleans Riverside)
X. Zhang and J. Fergus (Auburn University)
Garnet-type Li7La3Zr2O12 (LLZO) is an attractive solid electrolyte material for lithium batteries. Obtaining the desired high conductivity requires formation of the cubic phase. Small amounts of aluminum and/or tantalum have been shown stabilize the cubic crystal structure and increase the conductivity. In this work, aluminum- and tantalum-doped LLZO have been prepared and evaluated with materials characterization techniques and impedance spectroscopy. The dopant additions stabilized the cubic phase and increase the conductivity of the material.