Fast microwave-assisted synthesis of Li-stuffed garnets and insights into Li diffusion from muon spin spectroscopy
Corr, Serena and Amores, Marco and Ashton, Thomas and Baker, Peter J and Cussen, Edmund (2015) Fast microwave-assisted synthesis of Li-stuffed garnets and insights into Li diffusion from muon spin spectroscopy. Journal of Materials Chemistry. A. ISSN 2050-7488 (https://doi.org/10.1039/C5TA08107F)
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Abstract
Lithium-stuffed garnets attract huge attention due to their outstanding potential as solid-state electrolytes for lithium batteries. However, there exists a persistent challenge in the reliable synthesis of these complex functional oxides together with a lack of complete understanding of the lithium-ion diffusion mechanisms in these important materials. Addressing these issues is critical to realizing the application of garnet materials as electrolytes in all solid-state lithium-ion batteries. In this work, a cubic phase garnet of nominal composition Li6.5Al0.25La2.92Zr2O12 is synthesized through a microwave-assisted solid-state route for the first time, reducing considerably the reaction times and heating temperatures. Lithium-ion diffusion behavior is investigated by electrochemical impedance spectroscopy (EIS) and state-of-art muon spin relaxation (mSR) spectroscopy, displaying activation energies of 0.55 0.03 eV and 0.19 0.01 eV respectively. This difference arises from the high inter-grain resistance, which contributes to the total resistance in EIS measurements. In contrast, mSR acts as a local probe providing insights on the order of the lattice, giving an estimated value of 4.6210􀀀11 cm2s􀀀1 for the lithium diffusion coefficient. These results demonstrate the potential of this lithium-stuffed garnet as a solid-state electrolyte for all-solid state lithium-ion batteries, an area of growing interest in the energy storage community.
ORCID iDs
Corr, Serena, Amores, Marco, Ashton, Thomas, Baker, Peter J and Cussen, Edmund ORCID: https://orcid.org/0000-0002-2899-6888;-
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Item type: Article ID code: 55263 Dates: DateEvent17 December 2015Published17 December 2015Published Online8 December 2015AcceptedSubjects: Science > Chemistry Department: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 06 Jan 2016 16:24 Last modified: 01 Dec 2024 05:01 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/55263