Abstract
LiMnPO4/C powders have been prepared by a solid-state method with sucrose as carbon source. The structure, morphology, and electrochemical performance of the LiMnPO4/C samples have been characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electronic microscopy (TEM), galvanostatic charge and discharge, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The LiMnPO4/C sample prepared by the two-step solid-state method exhibits a specific capacity of 156 mA h g−1 after 40 cycles, and over 90 % of the initial capacity can be retained with a charge-discharge rate of 0.5 C and a voltage range of 2.5–4.4 V at 50 °C. The improvement of electrochemical performance attributes to the highly uniform distribution of the minimizing particle size as well as the superior electrical conductivity of the carbon-coated nano-LiMnPO4 materials by facile two-step solid-state synthesis.
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Acknowledgments
This work was partially supported by The Natural Science Foundation of China (no. 50902038), National High Technology Research and Development Program (863 Program) of China (no. 2012AA110203), and Heilong Jiang Postdoctoral Funds for Scientific Research Initiation (no. LBH-Q12084).
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Cheng, G., Zuo, P., Wang, L. et al. High-performance carbon-coated LiMnPO4 nanocomposites by facile two-step solid-state synthesis for lithium-ion battery. J Solid State Electrochem 19, 281–288 (2015). https://doi.org/10.1007/s10008-014-2556-2
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DOI: https://doi.org/10.1007/s10008-014-2556-2