Abstract
LiFePO4-positive electrode material was successfully synthesized by a solid-state method, and the effect of storage temperatures on kinetics of lithium-ion insertion for LiFePO4-positive electrode material was investigated by electrochemical impedance spectroscopy. The charge-transfer resistance of LiFePO4 electrode decreases with increasing the storage temperatures. This suggests that it has a high electrochemical activity at high temperature. The diffusion coefficient of lithium ion is greatly increased with increasing the storage temperatures, indicating that the kinetics of Li+ and electron transfer into the electrodes were much fast at high storage temperature.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (no. 50902001), the Key project of Scientific Research Foundation sponsored by Education Department of Anhui Province, China (no. KJ2010A045), and the Foundation for Young Talents in College of Anhui Province, China (no. 2010SQRL033ZD).
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Zhu, YR., Xie, Y., Zhu, RS. et al. Kinetic study on LiFePO4-positive electrode material of lithium-ion battery. Ionics 17, 437–441 (2011). https://doi.org/10.1007/s11581-011-0523-9
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DOI: https://doi.org/10.1007/s11581-011-0523-9