Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 5, Pages 3306-3313Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am508136k
Keywords
mesoporous structure; Co3O4 nanoflakes; microwave synthesis; lithium ion batteries; oxygen evolution reactions
Funding
- Australian Research Council (ARC) through the ARC Discovery project [DP1093855]
- ARC Future Fellowship project [FT110100800]
- Fundamental Research Funds for the Central University of China [NE2014301]
- China Scholarship Council (CSC) [2011689009]
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Mesoporous Co3O4 nanoflakes with an interconnected architecture were successfully synthesized using a microwave-assisted hydrothermal and low-temperature conversion method, which exhibited excellent electrochemical performances as anode materials in lithium ion batteries and as catalysts in the oxygen evolution reaction (OER). Field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) observations showed the unique interconnected and mesoporous structure. When employed as anode materials for lithium ion batteries, mesoporous Co3O4 nanoflakes delivered a high specific capacity of 883 mAh/g at 0.1C current rate and stable cycling performances even at higher current rates. Post-mortem analysis of ex situ FESEM images revealed that the mesoporous and interconnected structure had been well maintained after long-term cycling. The mesoporous Co3O4 nanoflakes also showed both OER active properties and good catalytic stability. This could be attributed to both the stability of unique mesoporous structure and highly reactive facets.
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