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Journal of the Electrochemical Society, Vol.164, No.1, A6395-A6400, 2017
Synthesis and Ionic Conductivity Studies of In- and Y-Doped Li6Hf2O7 as Solid-State Electrolyte for All-Solid State Li-Ion Batteries
The development of all solid-state lithium batteries is reliant on suitable high performance solid state electrolytes. Here, we present the synthesis and ionic conductivity of the In- and Y-doped Li6Hf2O7 materials; Li6+xHf2-xMxO7 (M = In3+, Y3+). Microwave-assisted synthesis was used to give phase pure material after heating for 4 hours at 850 degrees C. The ionic conductivity of the materials is increased with the insertion of interstitial lithium ion within the structure from 0.02 to 0.25 mS cm(-1) at 174 degrees C and the activation energy for ionic conduction is lowered from 0.97(4) eV to 0.42(3) eV with respect to the undoped material. (C) The Author(s) 2017. Published by ECS. All rights reserved.