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Kana, N., Touidjine, K., Olivier-Archambaud, S., Gkaniatsou, E., Paris, M., Dupre, N., Gautier, N., Moreau, P., Sicard, C., Lestriez, B. & Devic, T. (2023) Is There Any Benefit of Coating Si Particles for a Negative Electrode Material for Lithium-Ion Batteries with Metal-Organic Frameworks? The Case of Aluminum Fumarate. Acs Applied Energy Materials, 6 9218–9230.
Added by: Richard Baschera (2023-08-17 13:13:20) Last edited by: Richard Baschera (2023-11-22 15:39:13) |
| Type de référence: Article DOI: 10.1021/acsaem.3c00658 Numéro d'identification (ISBN etc.): 2574-0962 Clé BibTeX: Kana2023a Voir tous les détails bibliographiques  |
Catégories: IMN, ST2E Créateurs: Devic, Dupre, Gautier, Gkaniatsou, Kana, Lestriez, Moreau, Olivier-Archambaud, Paris, Sicard, Touidjine Collection: Acs Applied Energy Materials |
Consultations : 1/127
Indice de consultation : 10% Indice de popularité : 2.5% |
| Liens URLs https://doi.org/10.1021/acsaem.3c00658 |
| Résumé |
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Thanks to its high gravimetric and volumetric capacities, silicon (Si) is one of the most promising alternatives to graphite for negative electrodes for lithium-ion batteries. Its practical use is nevertheless hampered by its low capacity retention, resulting from its high volume variation upon cycling driving the formation of an unstable solid electrolyte interphase (SEI). Coatings of Si particles with metal–organic frameworks (MOFs) acting as artificial SEIs were recently reported and found to lead to improved electrochemical performances in a few cases. We here developed a room temperature route to coat Si particles with the aluminum fumarate MOF (Al-fum), in conditions compatible with the aqueous formulation of state-of-the-art Si electrodes. Thanks to a variety of characterization techniques, including IR and solid-state NMR spectroscopies, powder X-ray diffraction, and scanning transmission electron microscopy coupled with energy-dispersive X-ray analysis (STEM-EDX), we show that a layer of ca. 20 nm of MOF is grown at the surface of the Si particles. Nevertheless, such a coating does no translate into any major modification of the electrochemical performance when the Si particles are integrated in electrodes with a loading of practical interest (∼2 mgSi cm–2). Postmortem characterizations revealed that Al-fum, although being highly stable toward water, evolves in the standard LP30 electrolyte through a reaction with the PF6– anions. The MOF further reacts during the first electrochemical reduction, ultimately leading to lithium aluminate phases, still located at the surface of the Si particles. Considering the growing interest of MOFs in the field of electrochemical energy storage, this let us conclude that there is probably a general need to more deeply and systematically evaluate the stability of MOFs toward battery electrolytes and electrochemical processes.
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Publisher: American Chemical Society
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