Low-cost synthesis of nanocrystalline and spherical LiFePO4/C composite cathode materials

摘要: AbstractA nanocrystalline spherical morphology LiFePO4/C composite material was synthesised by milling-assisted spray pyrolysis method using commercial LiOH•H2O, Fe, H3PO4 and glucose as raw materials. To optimise phase purity, the as-sprayed powder calcined at 720°С in N2. In ball milling process, grain size of controlled ∼100–300 nm. The samples were characterised thermo-gravimetric analysis, X-ray diffraction scanning electron microscopy. Electrochemical performance tests investigated terms charge–discharge curves cycling capacity a battery test system (Land CT2001A). Results showed that initial discharge cathode 0·2, 0·5 1 C 166·2, 160·8 155·2 mAh g−1, respectively. retention rate reached 99% after 20 cycles. This indicated obtained lithium-ion material, lithium iron phosphate, has excellent electrochemical performance.