Abstract
Sodium extracted C@NaV2(PO4)3, prepared by oxidative treatment in an iodine solution in acetonitrile, will be evaluated for the first time as a potential cathode in rechargeable magnesium batteries. Three C@NaV2(PO4)3 samples with different particle morphologies are used as precursors. The structural and chemical changes, induced by the sodium extraction, will be determined by X-ray diffraction, electron microscopy, EPR and XPS spectroscopy. The reversible insertion of magnesium will be evidenced and the effect of the different morphologies on the electrochemical performance of Mg hybrid cells will be unveiled. A larger capacity will be recorded for the sample prepared by ball milling, meanwhile a better rate capability will be demonstrated by that sample with a mosaic-like microstructure.
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