Abstract
In this work, rationally designed 3D cobalt sulfide nanoflowers (3D CoS NF) were prepared by a facile one-step solvothermal method. The 3D CoS NFs were assembled from low dimensional building blocks with thin 2D nanoflakes with an average thickness of 19 nm (between 1 and 100 nm). SEM and TEM images revealed that the flower-like hierarchitecture consisted with an average diameter of 12 μm. XRD data indicated that the as-prepared sample had a pure hexagonal CoS crystal structure. Such 3D CoS NF was applied for fast-charge storage device which delivered a specific capacity of 669 C g−1 at a current density of 1 A g−1. By assembling the 3D CoS NF into an asymmetric supercapacitor (ASC), the device showed 129.0 C g−1 capacity and long cycle stability (85.7% retention after 3000 cycles).
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Acknowledgements
The authors thank the financial supports provided by National Natural Science Foundation of China (No. 21471160), the Fundamental Research Funds for the Central Universities (16CX05014A, 16CX05016A), and the Taishan Scholar Program of Shandong Province.
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This study was funded by National Natural Science Foundation of China (No. 21471160), the Fundamental Research Funds for the Central Universities (16CX05014A, 16CX05016A), and the Taishan Scholar Program of Shandong Province.
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Zhang, S., Li, C., Xiao, H. et al. Synthesis of 3D flower-like cobalt sulfide hierachitecture for high-performance electrochemical energy storage. J Nanopart Res 19, 202 (2017). https://doi.org/10.1007/s11051-017-3905-8
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DOI: https://doi.org/10.1007/s11051-017-3905-8