Surfactant-assisted mild hydrothermal synthesis to nanostructured mixed orthophosphates LiMnyFe1−yPO4/C lithium insertion cathode materials

摘要: Nanostructured mixed phospho-olivine LiMnyFe1−yPO4/C composites having different ratio of manganese and iron (0 < y 1) are prepared by an easy, quick cost effective hydrothermal synthesis in the presence a cationic surfactant their electrochemical behaviour as cathodes for Li-ion battery is demonstrated. A detailed study influence Fe substitution with Mn on structure, morphology performances resulting samples performed means X-ray powder diffraction Rietveld refinement patterns, inductively coupled plasma atomic emission spectroscopy, photoelectron N2 physisorption at 77 K, scanning transmission electron microscopy, cyclic voltammetry constant current charge-discharge cycling. The best performing composite sample able to deliver very stable cycling several hundred cycles good specific capacity values, high Coulombic efficiency rate capability also demonstrated work real configuration versus graphite anode. These improved properties ascribed kind adopted that leads nanostructured particles, homogeneously coated thin layer carbon, which exerts its positive effect improving electronic conductivity suppressing dissolution from olivine structure during prolonged