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 () and Edmund J. Cussen ()
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Marco Amores: University of Sheffield
Hany El-Shinawi: University of Sheffield
Innes McClelland: University of Sheffield
Stephen R. Yeandel: Loughborough University
Peter J. Baker: Harwell Science and Innovation Campus
Ronald I. Smith: Harwell Science and Innovation Campus
Helen Y. Playford: Harwell Science and Innovation Campus
Pooja Goddard: Loughborough University
Serena A. Corr: University of Sheffield
Edmund J. Cussen: University of Sheffield

Nature Communications, 2020, vol. 11, issue 1, 1-12

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 (

Date: 2020
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DOI: 10.1038/s41467-020-19815-5

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