With general chemical formula of LiMPO 4, compounds in the LiFePO 4 family adopt the structure. M includes not only Fe but also Co, Mn and Ti. As the first commercial LiMPO 4 was C/LiFePO 4, the whole group of LiMPO 4 is informally called “lithium iron phosphate” or “LiFePO 4”. However, more than one olivine-type phase may be used as a battery's cathode material. Olivine compounds such as A yMPO 4, Li 1−xMFePO 4, and LiFePO 4−zM have the same cryst.
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