The use of olivine LiFePO 4 (LFP) in electric vehicle battery packs has generated renewed interest in olivine phosphate cathodes for lithium-ion batteries. 1–3 Traditionally, LFP is made by solid-state synthesis, i.e., the mixing and heating of solid precursors like Li 2 CO 3 or LiOH·xH 2 O as a lithium source, FeC 2 O 4 ·xH 2 O or Fe(CH 3 COO 2) 2 as an …