| DOI | Trouver le DOI : https://doi.org/10.1016/j.electacta.2015.07.031 |
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| Auteur | Rechercher : Fu, X.; Rechercher : Chang, Z.; Rechercher : Chang, K.; Rechercher : Li, B.; Rechercher : Tang, H.; Rechercher : Shangguan, E.; Rechercher : Yuan, X.-Z.1; Rechercher : Wang, H.1 |
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| Affiliation | - Conseil national de recherches Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | Lithium ion battery; lithium manganese phosphate; solution-phased method; low temperature synthesis; dimethyl sulfoxide |
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| Résumé | Nano-sized hollow spindle LiMnPO4 with a well-developed olivine-type structure was synthesized with the assistance of glucose in dimethyl sulfoxide (DMSO)/H2O under ambient pressure and 108 °C. The scanning electron microscopy (SEM) and transmission electron microscope (TEM) images show that the LiMnPO4 particles consist of hollow spindles with a mean width of 200 nm, length of 500-700 nm, and wall thickness of about 30-60 nm. The LiMnPO4/C nanocomposite was obtained by sintering nano-sized LiMnPO4 with glucose at 650 °C under an inert atmosphere for 4 h. With a coated carbon thickness of about 10 nm, the obtained composite maintained the morphology and size of the hollow spindle. The electrochemical tests show the specific capacity of LiMnPO4/C nanocomposite is 161.8 mAh g-1 at 0.05C, 137.7 mAh g-1 at 0.1C and 110.8 mAh g-1 at 0.2 C. The retention of discharge capacity maintains 92% after 100 cycles at 0.2 C. After different rate cycles the high capacity of the LiMnPO4/C nanocomposite can be recovered. This high performance is attributed to the composite material's hollow spindle structure, which facilitates the electrolyte infiltration, resulting in an increased solid-liquid interface. The carbon layer covering the hollow spindle also contributes to the high performance of the LiMnPO4/C material as the carbon layer improves its electronic conductivity and the nano-scaled wall thickness decreases the paths of Li deintercalation. |
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| Date de publication | 2015 |
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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 | 21276941 |
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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 | 0133138d-8119-4d50-865b-de94f557d1a3 |
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| Enregistrement créé | 2015-11-10 |
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| Enregistrement modifié | 2020-04-22 |
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