Toward elucidation of delithiation mechanism of zinc-substituted LiFePO4

► Structural and transport properties of LiFe0.75Zn0.25PO4. ► Single phase-type electrode reaction of LixFe0.75Zn0.25PO4. ► Electrical conductivity, charge-discharge profiles and cyclic voltammetry studies. ► Chemical diffusion coefficient D and surface exchange reaction coefficient K.