Mössbauer parameters of samples A (LiFePO4), B (Li1.02FePO4), C (Li1.05FePO4) and D (Li1.1FePO4).
| Sample code | Fe sites | Quadrupole splitting (Δ EQ) mm s−1 | Isomer shift (δ) mm s−1 | Line width (Γ) mm s−1 | Relative area, RA (%) | Goodness of fit (χ2) |
|---|---|---|---|---|---|---|
| A | Doublet A (Fe2+) LiFePO4 | 2.964 ± 0.002 | 1.232 ± 0.001 | 0.287 ± 0.003 | 84.4 | 1.17213 |
| Doublet B (Fe3+) | 0.606 ± 0.015 | 0.345 ± 0.009 | 0.373 ± 0.017 | 15.6 | ||
| B | Doublet A (Fe2+) LiFePO4 | 2.967 ± 0.003 | 1.209 ± 0.001 | 0.29 ± 0.001 | 88.2 | 1.1305 |
| Doublet B (Fe3+) FePO4 | 0.151 ± 0.06 | 0.238 ± 0.03 | 0.368 ± 0.1 | 7.4 | ||
| Doublet C (FeP) | 1.477 ± 0.08 | 0.457 ± 0.08 | 0.24 ± 0.1 | 4.4 | ||
| C | Doublet A (Fe2+) LiFePO4 | 2.97 ± 0.001 | 1.225 ± 0.003 | 0.266 ± 0.003 | 91.5 | 1.27856 |
| Doublet B (Fe3+) Fe4P6O21 | 0.769 ± 0.07 | 0.504 ± 0.03 | 0.451 ± 0.07 | 5.9 | ||
| Doublet C (FeP) | 1.171 ± 0.05 | 0.643 ± 0.02 | 0.23 ± 0.04 | 2.6 | ||
| D | Doublet A (Fe2+) LiFePO4 | 2.973 ± 0.001 | 1.227 ± 0.001 | 0.276 ± 0.002 | 86.9 | 1.0252 |
| Doublet B (Fe3+) Fe4P6O21 | 0.794 ± 0.07 | 0.516 ± 0.03 | 0.574 ± 0.1 | 8.0 | ||
| Doublet C (Fe2P) | 0.147 ± 0.05 | 0.458 ± 0.06 | 0.416 ± 0.09 | 5.1 |