Abstract
Nano/mesoporous transition metal oxides have attracted extensive attention because of their distinctive morphology and properties, along with exhibiting better performance in many applications. We employed a simple modified version of the one-pot co-precipitation method at room temperature to synthesize three-dimensional mesoporous microstructures obtained by the self-aggregation of Co3O4 nanoparticles, which is sparse in the literature. The obtained structures were used as electrode materials for electrochemical capacitors or supercapacitors. The as-obtained Co3O4 electrode exhibited acceptable specific capacitances of 400 and 165 F·g−1 at applied current densities of 1 and 10 A·g−1, respectively, with over 99% of capacity retention after 4000 cycles.
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Acknowledgements
This work was supported by the 2016 Post-doctoral Research Program of Inje University. The research was partly supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2015R1D1A1A01059983) and the Basic Science Research Program National Research Foundation of Korea (NRF) grant funded by the Ministry of Education (NRF- 2018R1D1A1B07044026). And this work was also supported by Engineering Research Center of the Excellence Program of National Research Foundation of Korea (NRF) (Grant NRF-2014R1A5A1009799).
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Venugopal, N., Kim, WS. & Sohn, K.Y. Room-temperature synthesis of Co3O4 nanoparticles self-assembled into meso/nanoporous microstructures and their application. Korean J. Chem. Eng. 36, 1536–1542 (2019). https://doi.org/10.1007/s11814-019-0338-3
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DOI: https://doi.org/10.1007/s11814-019-0338-3