Interface behavior between garnet-type lithium-conducting solid electrolyte and lithium, metal

Al2O3 was doped (0.5, 1.0. and 2.0 wt.%) into the garnet-type lithium ion-conducting solid electrolyte with a nominal composition of Li7La3Zr2O12 (LLZ) by solid state reaction at 1180 degrees C. The effect of the Al2O3 content in LIZ on the interface behavior with lithium metal was investigated. The lowest interface resistance was observed for 0.5 wt.% Al2O3-doped LIZ, which had the highest relative density of 93.7%. The Li/Al2O3-doped LIZ/Li cell showed a short circuit after a limited polarization period. Short circuiting is considered to be due to lithium dendrite formation. The longest period until short circuit was 1000 s of polarization at 0.5 mA cm(-2) and room temperature for the 05 wt.% Al2O3 doped LIZ. (C) 2013 Elsevier B.V. All rights reserved.