A new coat: LiMn1?xFexPO4 materials with a LiFePO4 outer layer of varying thickness and a LiMn0.85Fe0.15PO4 bulk were prepared. The physical characteristics such as tap density, porosity, and spherical morphology were fine-tuned. The double-structured micron-sized LiMn0.85Fe0.15PO4/LiFePO4 material (see picture) shows properties which make this material an ideal candidate for rechargeable lithium batteries.