Raman spectroscopy of carbon-coated LiCoPO4 and LiFePO4 olivines

► Gasification of the carbon coating layer from olivine nano-powders during Raman measurements. ► The olivine structure of LiCoPO4-C powder is stable during exposure to a laser beam. ► LiFePO4-C powder decomposes at the same conditions to form Li3Fe2(PO4)3 and Fe2O3.