Abstract
Hierarchical LiNi0.5Mn1.5O4 (LNMO) micro-rods composed of primary nanoparticles are fabricated through a hydrothermal route with the presence of glycine, followed by the process control calcination. The as-obtained hierarchical micro-rods reach ca. 8 μm in length and ca. 2 μm in width, and the diameter of primary nanoparticles reach ca. 200 nm. The electrochemical results signify the hierarchical LNMO micro-rods can be a superb combination of the advantages of nanoparticles and micro-rods, which exhibit enhanced rates performance. Reversible discharge capacities around 144, 140, 131, 125, 118, 112 mAh/g at rates of 1, 2, 5, 10, 15 and 20 C are achieved. Particularly, after 200 cycles at 1 C, the discharge capacity remains 142 mAh/g, together with a coulombic efficiency of 99.16%.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 21401049, 51673060, 11574075, 51272071), the Ministry of Science and Technology of China (Grant 2016YFA0200200), Hubei Provincial Department of Science & Technology (2016CFB199, 2015CFB266, 2014CFA096), Natural Science Fund for Distinguished Young Scholars of Hubei Province, China (2016CFA036), Hubei Provincial Department of Education (Q2016010 and D201602).
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Zhou, S., Mei, T., Li, J. et al. Hierarchical LiNi0.5Mn1.5O4 micro-rods with enhanced rate performance for lithium-ion batteries. J Mater Sci 53, 9710–9720 (2018). https://doi.org/10.1007/s10853-018-2272-x
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DOI: https://doi.org/10.1007/s10853-018-2272-x