Synthesis and ionic conductivity studies of In- and Y-doped Li6Hf2O7 as solid-state electrolyte for all-solid state Li-ion batteries

Amores, M. and Corr, S. A. and Cussen, E. J. (2017) Synthesis and ionic conductivity studies of In- and Y-doped Li6Hf2O7 as solid-state electrolyte for all-solid state Li-ion batteries. Journal of the Electrochemical Society, 164 (1). A6395-A6400. ISSN 0013-4651 (https://doi.org/10.1149/2.06011701jes)

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Abstract

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 oC. 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 oC 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.

ORCID iDs

Amores, M., Corr, S. A. and Cussen, E. J. ORCID logoORCID: https://orcid.org/0000-0002-2899-6888;
CORE (COnnecting REpositories)