Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/10045
Title: In situ neutron diffraction monitoring of Li7La3Zr2O12 formation: towards a rational synthesis of garnet solid electrolytes
Authors: Rao, RP
Gu, W
Sharma, N
Peterson, VK
Avdeev, M
Adams, S
Keywords: Phase transformations
Lithium
Neutron diffraction
Electric conductivity
Radioisotope batteries
Ionic conductivity
Carbonates
Issue Date: 1-Apr-2015
Publisher: American Chemical Society
Citation: Rao, R. P., Gu, W., Sharma, N., Peterson, V. K., Avdeev, M., & Adams, S. (2015). In situ neutron diffraction monitoring of Li7La3Zr2O12 formation: towards a rational synthesis of garnet solid electrolytes. Chemistry of Materials, 27(8), 2903–2910. doi:10.1021/acs.chemmater.5b00149
Abstract: The favorable combination of fast-ionic conductivity and high electrochemical stability of Li-stuffed garnet type Li7La3Zr2O12 (LLZ) makes this material a promising candidate for applications as a solid-state electrolyte in high-energy-density batteries. However, a widespread technical use of LLZ is impeded by difficulty in reliable formation and densification of the pure fast-ion conducting phase. The present study of the phase-formation process enables rational fabrication procedures to be devised based on a thorough understanding of the complex phase formation of LLZ. In situ neutron powder diffraction monitoring of the phase formation revealed an influence of the partial melting of precursors on the formation of the fast-ion conducting phase, indicating that in the typical synthesis route LLZ is not formed in a solid-state reaction but from a partial carbonate melt that decomposes on further heating. The cooling rate critically influences lithium ordering and ionic conductivity. © 2015 American Chemical Society
URI: https://doi.org/10.1021/acs.chemmater.5b00149
https://apo.ansto.gov.au/dspace/handle/10238/10045
ISSN: 1520-5126
Appears in Collections:Journal Articles

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