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Download fileLi1.5La1.5MO6 (M = W6+, Te6+) as a new series of lithium-rich double perovskites for all-solid-state lithium-ion batteries
journal contribution
posted on 2020-12-21, 10:16 authored by Marco Amores, Hany El-Shinawi, Innes McClelland, Stephen R Yeandel, Peter J Baker, Ronald I Smith, Helen Y Playford, Pooja GoddardPooja Goddard, Serena A Corr, Edmund J CussenSolid-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.
Funding
Design and high throughput microwave synthesis of Li-ion battery materials
Engineering and Physical Sciences Research Council
Find out more...Faraday Institution (SOLBAT, Grant No. FIRG007)
MATERIALS CHEMISTRY HIGH END COMPUTING CONSORTIUM
Engineering and Physical Sciences Research Council
Find out more...HIGH END COMPUTING MATERIALS CHEMISTRY CONSORTIUM
Engineering and Physical Sciences Research Council
Find out more...Proposal for a Tier 2 Centre - HPC Midlands Plus
Engineering and Physical Sciences Research Council
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School
- Science
Department
- Chemistry
Published in
Nature CommunicationsVolume
11Issue
1Publisher
Nature ResearchVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This is an Open Access Article. It is published by Nature Research under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/Acceptance date
2020-10-27Publication date
2020-12-15Copyright date
2020ISSN
2041-1723eISSN
2041-1723Publisher version
Language
- en