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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Spencer Jolly, Dominic
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2023Structural changes in the silver-carbon composite anode interlayer of solid-state batteriescitations
- 2023The effect of volume change and stack pressure on solid‐state battery cathodescitations
- 2020Sodium/Na β″ Alumina Interfacecitations
- 2019Is nitrogen present in Li3N·P2S5 solid electrolytes produced by ball milling?citations
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article
The effect of volume change and stack pressure on solid‐state battery cathodes
Abstract
Solid-state lithium batteries may provide increased energy density and improved safety compared with Li-ion technology. However, in a solid-state composite cathode, mechanical degradation due to repeated cathode volume changes during cycling may occur, which may be partially mitigated by applying a significant, but often impractical, uniaxial stack pressure. Herein, we compare the behavior of composite electrodes based on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (LTO) (negligible volume change) and Nb<sub>2</sub>O<sub>5</sub> (+4% expansion) cycled at different stack pressures. The initial LTO capacity and retention are not affected by pressure but for Nb<sub>2</sub>O<sub>5</sub>, they are significantly lower when a stack pressure of <2 MPa is applied, due to inter-particle cracking and solid-solid contact loss because of cyclic volume changes. This work confirms the importance of cathode mechanical stability and the stack pressures for long-term cyclability for solid-state batteries. This suggests that low volume-change cathode materials or a proper buffer layer are required for solid-state batteries, especially at low stack pressures.