Abstract
Co0.5 TiOPO4 and LiFe0.4Mn0.6 PO4 phosphates present the electrochemical features of anode and cathode of lithium ion batteries, respectively. The cobalt oxyphosphate exhibits a high capacity and a working potential around 1.5 V. During the first discharge, an irreversible lithiation reaction occurs while during the subsequent cycles, a good reversibility of the charge/discharge process was obtained with a stable specific capacity approaching 280 mAh/g even at high rate. For the LiFe0.4Mn0.6PO4 olivine, the electrochemical process occurs in two steps involving separately two redox couples: Mn3+/Mn2+ and Fe3+/Fe2+. The electrochemical lithiation/delithiation occur without significant changes in the structure. Even if the obtained capacity (110 mAh/g), is lower that the theoretical one, the coulombic storage efficiency is rather good (95%).
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Saadoune, I., Lasri, K., Bezza, I., Indris, S., Brandell, D., Ehrenberg, H. (2015). Electrode Materials Based on Phosphates for Lithium Ion Batteries as an Efficient Energy Storage System. In: Karaman, I., Arróyave, R., Masad, E. (eds) Proceedings of the TMS Middle East — Mediterranean Materials Congress on Energy and Infrastructure Systems (MEMA 2015). Springer, Cham. https://doi.org/10.1007/978-3-319-48766-3_36
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DOI: https://doi.org/10.1007/978-3-319-48766-3_36
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