Abstract
Submicron rod LiFePO4/C has been synthesized via a facile hydrothermal process. The morphology, crystal structure, and charge–discharge performance of the prepared samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and galvanostatic charge–discharge testing. The SEM and TEM illustrate that submicron rods with a width of about 140 nm and a length of up to 400 nm have been obtained. The TEM test also indicates a “core–shell” structure with a 1.5–2 nm carbon shell on the LiFePO4 core. Even though the separate carbon-coated procedure is not used in this method, the electrochemical behavior results are satisfied. It displays that LiFePO4/C has highly crystalline and a desirable core–shell structure with uniform carbon film. Galvanostatic battery testing shows that LiFePO4/C delivers 104 mAh g−1 at 5 C rates. The highest specific capacity of 166 mAh g−1 is achieved at 0.1 C rate, and 99.8 % of the initial specific capacitance remained after 30 cycles.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (no. 21163010), the Key Project of Chinese Ministry of Education (no. 212183), and the Natural Science Funds for Distinguished Young Scholars of Gansu Province (no. 1111RJDA012).
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Liu, H., Kong, LB., Zhang, P. et al. A facile hydrothermal method to prepare LiFePO4/C submicron rod with core–shell structure. Ionics 20, 15–21 (2014). https://doi.org/10.1007/s11581-013-0958-2
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DOI: https://doi.org/10.1007/s11581-013-0958-2