Abstract
Design and control over the growth of novel nanomaterial for flexible electrode are significant and practical for the study of portable energy storage devices. Herein, the flexible all-solid-state charge-storage devices assembled by the hierarchical CoMn2O4 nanoneedle array on the Ni foam electrode have been designed and manufactured. The CoMn2O4 electrode is prepared via a hydrothermal process and subsequent annealing treatment. The CoMn2O4 electrode has a high-power battery-type behavior with a capacity of 223 mAh g−1 at a discharge current density of 1 A g−1 in a three-electrode system. When applied in the flexible all-solid-state charge-storage device, it displays a satisfactory capacity of 46 mAh g−1 at a discharge current density of 1 A g−1, an energy density of 23.29 Wh kg−1 at a power density of 0.5 kW kg−1 and a power density of 4 kW kg−1 at an energy density of 12 Wh kg−1. About 80.3% of the initial capacity is achieved after 5000 charge/discharge cycles at a current density of 4 A g−1, which shows the excellent cycling stability of the device. This work demonstrates the potential application of the CoMn2O4 nanoneedle array electrode for high-performance flexible charge-storage devices.
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Acknowledgments
This work was supported by the Key Project of Henan Educational Committee (Grant No. 15A140035), the National Natural Science Foundation of China (Nos. 51502257, 61574122, and U1304108), and the Innovative Research Team (in Science and Technology) in the University of Henan Province (No. 13IRTSTHN018). This work was also supported by the Nanhu Scholars Program for Young Scholars of Xinyang Normal University.
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Peng, T., Hou, X., Liu, C. et al. Controlled synthesis of hierarchical CoMn2O4 nanostructures for flexible all-solid-state battery-type electrodes. J Solid State Electrochem 21, 1579–1587 (2017). https://doi.org/10.1007/s10008-017-3516-4
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DOI: https://doi.org/10.1007/s10008-017-3516-4