Abstract
Our previous work reported a new strategy based on a P excess reaction system to hydrothermally synthesize lithium transition metal phosphates (LiMPO4), and herein the effect of P excess on the synthesis and property of LiMPO4 is investigated in detail by taking the multi-component LiMn0.8Fe0.19Mg0.01PO4 as a case. The results show that a proper degree of P excess is fairly profitable for hydrothermal synthesis including the effect on suppressing the occurrence of undesired Fe2+ oxidation during synthesis and improving the particle dispersion of hydrothermal product, and thus the obtained samples have enhanced electrochemical performance. These effects of P excess should be general and applicable to hydrothermal synthesis of other lithium transition metal phosphates.
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This work is supported by the National Natural Science Foundation of China (grant numbers 51874155 and 51664031).
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Chu, X., Chen, W. & Fang, H. Hydrothermal synthesis of olivine phosphates in the presence of excess phosphorus: a case study of LiMn0.8Fe0.19Mg0.01PO4. Ionics 27, 3259–3269 (2021). https://doi.org/10.1007/s11581-021-04113-x
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DOI: https://doi.org/10.1007/s11581-021-04113-x