| Téléchargement | - Voir la version finale : Accelerated removal of Fe-antisite defects while nanosizing hydrothermal LiFePO₄ with Ca²⁺ (PDF, 1.3 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.nanolett.6b00334 |
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| Auteur | Rechercher : Paolella, Andrea; Rechercher : Turner, Stuart; Rechercher : Bertoni, Giovanni; Rechercher : Hovington, Pierre; Rechercher : Flacau, Roxana1; Rechercher : Boyer, Chad1; Rechercher : Feng, Zimin; Rechercher : Colombo, Massimo; Rechercher : Marras, Sergio; Rechercher : Prato, Mirko; Rechercher : Manna, Liberato; Rechercher : Guerfi, Abdelbast; Rechercher : Demopoulos, George P.; Rechercher : Armand, Michel; Rechercher : Zaghib, Karim |
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| Affiliation | - Conseil national de recherches du Canada. Technologies de sécurité et de rupture
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| Format | Texte, Article |
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| Sujet | Antisite; LiFePO₄; calcium; surface; defects; hydrothermal |
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| Résumé | Based on neutron powder diffraction (NPD) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM), we show that calcium ions help eliminate the Fe-antisite defects by controlling the nucleation and evolution of the LiFePO₄ particles during their hydrothermal synthesis. This Ca-regulated formation of LiFePO₄ particles has an overwhelming impact on the removal of their iron antisite defects during the subsequent carbon-coating step since (i) almost all the Fe-antisite defects aggregate at the surface of the LiFePO₄ crystal when the crystals are small enough and (ii) the concomitant increase of the surface area, which further exposes the Fe-antisite defects. Our results not only justify a low-cost, efficient and reliable hydrothermal synthesis method for LiFePO₄ but also provide a promising alternative viewpoint on the mechanism controlling the nanosizing of LiFePO₄, which leads to improved electrochemical performances. |
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| Date de publication | 2016-03-11 |
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| Maison d’édition | ACS Publications |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 23000355 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 9c4e096d-0c16-4cab-a2cd-5894bdc25dec |
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| Enregistrement créé | 2016-07-08 |
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| Enregistrement modifié | 2020-06-02 |
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