Projects per year
Abstract
Solid-state batteries with inorganic solid electrolytes are currently being discussed as a more reliable and safer future alternative to the current lithium-ion battery technology. To compete with state-of-the-art lithium-ion batteries, solid electrolytes with higher ionic conductivities are needed, especially if thick electrode configurations are to be used. In the search for optimized ionic conductors, the lithium argyrodites have attracted a lot of interest. Here, we systematically explore the influence of aliovalent substitution in Li6+xP1-xGexS5I using a combination of X-ray and neutron diffraction, as well as impedance spectroscopy and nuclear magnetic resonance. With increasing Ge content, an anion site disorder is induced and the activation barrier for ionic motion drops significantly, leading to the fastest lithium argyrodite so far with 5.4 ± 0.8 mS cm-1 in a cold-pressed state and 18.4 ± 2.7 mS cm-1 upon sintering. These high ionic conductivities allow for successful implementation within a thick-electrode solid-state battery that shows negligible capacity fade over 150 cycles. The observed changes in the activation barrier and changing site disorder provide an additional approach toward designing better performing solid electrolytes.
Original language | English |
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Pages (from-to) | 16330-16339 |
Number of pages | 10 |
Journal | Journal of the American Chemical Society |
Volume | 140 |
Issue number | 47 |
Early online date | 1 Nov 2018 |
DOIs | |
Publication status | Published - 28 Nov 2018 |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry
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Dive into the research topics of 'Inducing High Ionic Conductivity in the Lithium Superionic Argyrodites Li6+xP1-xGexS5I for All-Solid-State Batteries'. Together they form a unique fingerprint.Projects
- 1 Finished
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Dr B Morgan URF - Modelling Collective Lithium-Ion Dynamics in Battery Materials
Morgan, B. (PI)
1/10/14 → 30/09/19
Project: Research council
Profiles
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Benjamin Morgan
- Department of Chemistry - Reader/Royal Society Research Fellow
- Institute of Sustainability and Climate Change
Person: Research & Teaching, Affiliate staff