Nanoscopic scale studies of LiFePO4 as cathode material in lithium-ion batteries for HEV application

Julien Cm (1) , A. Mauger (1) , A. Ait Salah (1) , M. Massot (2) , F. Gendron (1) , K. Zaghib (3)

1 INSP - Institut des Nanosciences de Paris
2 IMPMC - Institut de minéralogie et de physique des milieux condensés
3 Inst Rech Hydro Quebec

We present a review of the structural properties of LiFePO4. Depending on the mode of preparation, different impurities can poison this material. These impurities are identified and a quantitative estimate of their concentrations is deduced from the combination of X-ray diffraction analysis, Fourier transform infrared spectroscopy, Raman spectroscopy, and magnetic measurements. An optimized preparation provides samples with carbon-coated particles free of any impurity phase, insuring structural stability and electrochemical performance that justify the use of this material as a cathode element a new generation of lithium secondary batteries.

Mots clés: lithium iron phosphate; Li-ion batteries; intercalation compounds; materials preparations; electrochemical stabilities CHEMICAL-LOOPING COMBUSTION; IRON PHOSPHATE; ELECTROCHEMICAL PERFORMANCE; CARBOTHERMAL REDUCTION; HYDROTHERMAL SYNTHESIS; AQUEOUS PRECIPITATION; CARBON-FILMS; TEMPERATURES; TRIPHYLITE

Domaines: Physique Quantique [quant-ph]

Julien Cm, A. Mauger, A. Ait Salah, M. Massot, F. Gendron, et al.. Nanoscopic scale studies of LiFePO4 as cathode material in lithium-ion batteries for HEV application. Ionics, 2007, 13, pp.395-411. ⟨10.1007/s11581-007-0149-0⟩. ⟨hal-00344715⟩