Fig. 4: Pourbaix diagram of the Li–Fe–P–H2O system and synthesis results.
From: Optimal thermodynamic conditions to minimize kinetic by-products in aqueous materials synthesis

a, Li–Fe–P–H2O Pourbaix diagram with [Li] = 0.75 mol l−1, [Fe] = 0.25 mol l−1, [P] = 0.3 mol l−1. The stability regions of different stable phases are marked in different colours. b, X-ray diffraction results on the products from syntheses under conditions B1–B7, which are associated with varying phosphorus concentration, pH and redox potential.