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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Li1.5La1.5MO6 (M = W6+, Te6+) as a new series of lithium-rich double perovskites for all-solid-state lithium-ion batteries Marco Amores , Hany El-Shinawi , Innes Mcclelland , Stephen R. Yeandel , Peter J. Baker , Ronald I. Smith , Helen Y. Playford , Pooja Goddard , Serena A. Corr , Edmund J. Cussen Nature Communications 11 DOI: 10.1038/s41467-020-19815-5 Diamond Proposal Number(s): [25120] Open Access Show Abstract ▼ Abstract: Solid-state batteries are a proposed route to safely achieving high energy densities, yet this architecture faces challenges arising from interfacial issues between the electrode and solid electrolyte. Here we develop a novel family of double perovskites, Li1.5La1.5MO6 (M = W6+, Te6+), where an uncommon lithium-ion distribution enables macroscopic ion diffusion and tailored design of the composition allows us to switch functionality to either a negative electrode or a solid electrolyte. Introduction of tungsten allows reversible lithium-ion intercalation below 1 V, enabling application as an anode (initial specific capacity >200 mAh g-1 with remarkably low volume change of ∼0.2%). By contrast, substitution of tungsten with tellurium induces redox stability, directing the functionality of the perovskite towards a solid-state electrolyte with electrochemical stability up to 5 V and a low activation energy barrier (<0.2 eV) for microscopic lithium-ion diffusion. Characterisation across multiple length- and time-scales allows interrogation of the structure-property relationships in these materials and preliminary examination of a solid-state cell employing both compositions suggests lattice-matching avenues show promise for all-solid-state batteries.	Dec 2020

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B18-Core EXAFS

Li1.5La1.5MO6 (M = W6+, Te6+) as a new series of lithium-rich double perovskites for all-solid-state lithium-ion batteries

Marco Amores , Hany El-Shinawi , Innes Mcclelland , Stephen R. Yeandel , Peter J. Baker , Ronald I. Smith , Helen Y. Playford , Pooja Goddard , Serena A. Corr , Edmund J. Cussen

Nature Communications 11

DOI: 10.1038/s41467-020-19815-5

Diamond Proposal Number(s): [25120]