Abstract
Hollow NiO ball-flowers closely assembled by porous nanosheets have been synthesized via a simple and template-free hydrothermal method. When applied to supercapacitor as electrode materials, the as-prepared NiO ball-flowers with hierarchical, porous, and hollow structures exhibited high specific capacitance value (734 F g−1) at a current density (1 A g−1), as well as good cycling stability. The outstanding electrochemical performance may be attributed to the morphology and structure of the nanosheet-assembled hollow ball-flowers which have the advantages of increasing specific surface area, facilitating the contact between the electrode and electrolyte, and accommodating the volume changes during faradaic reaction.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51302328) and supported in part by the Fundamental Research Fund for the Central Universities (No. 106112015CDJXY130006).
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Wang, J., Zhang, Y., Wan, P. et al. Nanosheet-assembled hollow NiO ball-flower for high-performance supercapacitor. J Mater Sci: Mater Electron 27, 8020–8026 (2016). https://doi.org/10.1007/s10854-016-4798-5
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DOI: https://doi.org/10.1007/s10854-016-4798-5