| DOI | Trouver le DOI : https://doi.org/10.1016/j.jallcom.2015.01.182 |
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| Auteur | Rechercher : Guo, Donglei; Rechercher : Wei, Xiuge; Rechercher : Chang, Zhaorong; Rechercher : Tang, Hongwei; Rechercher : Li, Bao; Rechercher : Shangguan, Enbo; Rechercher : Chang, Kun; Rechercher : Yuan, Xiao-Zi1; Rechercher : Wang, Haijiang1 |
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| Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | Cathodes; Charge transfer; Cyclic voltammetry; Diffusion; Electric batteries; Electric discharges; Electrochemical impedance spectroscopy; Electrodes; Geometry; Ions; Lithium; Lithium alloys; Lithium compounds; Manganese; Manganese oxide; Nanorods; Oxides; Secondary batteries; Solid state reactions; Spheres; Synthesis (chemical); BET surface area; Brunauer emmett tellers; Cath-ode materials; Charge transfer resistance; Electrochemical performance; Galvanostatic charge discharges; Lithium manganese oxide; Polyhedron sphere like; Lithium batteries |
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| Résumé | Polyhedron structured sphere-like lithium manganese oxide (LiMninf2/infOinf4/inf) is successfully synthesized from β-MnOinf2/inf nanorod precursor via a solid state reaction at a temperature of 800 °C. For comparison, LiMninf2/infOinf4/inf materials with nanorod and octahedron structures are also obtained from β-MnOinf2/inf nanorod precursor at temperatures of 700 °C and 900 °C, respectively. The galvanostatic charge-discharge result shows that the polyhedron sphere-like LiMninf2/infOinf4/inf sample exhibits the best electrochemical performance at high rate and high temperature. After 100 cycles at 5 C, this electrode is able to maintain 94% of its capacity at 25 °C and 81% at 55 °C. This is attributed to that the polyhedron sphere-like spinel LiMninf2/infOinf4/inf can suppress the dissolution of manganese ions. Based on Brunauer Emmett Teller (BET), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), the polyhedron sphere-like LiMninf2/infOinf4/inf sample has the lowest BET surface area, largest diffusion coefficient of Lisup+/sup and least charge transfer resistance. This study provides an insight into the capacity fading of LiMninf2/infOinf4/inf electrodes and the polyhedron structured sphere-like LiMninf2/infOinf4/inf can be a promising material for lithium ion batteries. |
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| Date de publication | 2015-01-30 |
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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 | 21275680 |
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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 | 5a91d2c3-1450-4d35-a123-78c9a8003d4b |
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| Enregistrement créé | 2015-07-14 |
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| Enregistrement modifié | 2020-04-22 |
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