Figure 3
Results of sequential Rietveld refinement. (a) The mass fraction of each phase. (b) Their unit-cell parameters. (c) The corresponding E–C curves collected during charge (C/2 rate) and discharge (10C rate). The notations stand for the three distinct Li1–xFe0.5Mn0.5PO4 phases: Li-rich (LFMP, x > 0.8), intermediate (L05FMP, 0.3 < x < 0.8) and Li-poor (FMP, x < 0.3). |