| DOI | Resolve DOI: https://doi.org/10.1021/jp2049684 |
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| Author | Search for: Wang, Huatao1; Search for: Zhang, Li1; Search for: Tan, Xuehai1; Search for: Holt, Chris M.B.1; Search for: Zahiri, Beniamin1; Search for: Olsen, Brian C.1; Search for: Mitlin, David1 |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Subject | 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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| Abstract | 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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| Publication date | 2011-07-20 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21272036 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | b8191008-634b-4018-8903-53667d131166 |
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| Record created | 2014-05-22 |
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| Record modified | 2020-04-21 |
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