| DOI | Trouver le DOI : https://doi.org/10.1021/jp2049684 |
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| Auteur | Rechercher : Wang, Huatao1; Rechercher : Zhang, Li1; Rechercher : Tan, Xuehai1; Rechercher : Holt, Chris M.B.1; Rechercher : Zahiri, Beniamin1; Rechercher : Olsen, Brian C.1; Rechercher : Mitlin, David1 |
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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 | Different scale; High volume fraction; Hydrothermal process; Hydrothermally synthesized; Interconnected arrays; Mass loadings; Mesoporous; SEM and TEM; Specific capacitance; Synthesis temperatures; Electrochemical properties; Microstructure; Nanostructures |
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| Résumé | A hydrothermal process was employed to create a variety of Co 3O4 nanostructures. We demonstrate that nominally minor differences in the synthesis temperature (50, 70°, or 90 °C) yield profound variations in the oxide microstructure, with lath-like, necklace-like and net-like morphologies of different scales resulting. This in turn resulted in significant variations in the supercapacitive performance that ranged from mediocre to superb. Specifically, the mesoporous net-like Co3O 4 nanostructures that were synthesized at 50 °C exhibited very favorable electrochemical properties: The net-like Co3O4 had a specific capacitance of 1090 F/g at a mass loading of 1.4 mg/cm 2. At this high mass loading, such performance has not been previously reported. SEM and TEM analysis of these samples revealed an interconnected array of sub-10 nm crystallites interspersed with a high volume fraction of similar scale pores. The poorer performing microstructures were both coarser and much less porous. © 2011 American Chemical Society. |
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| Date de publication | 2011-07-20 |
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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 | 21272036 |
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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 | b8191008-634b-4018-8903-53667d131166 |
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| Enregistrement créé | 2014-05-22 |
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| Enregistrement modifié | 2020-04-21 |
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