Papers by Keyword: Olivine Structure

Abstract: Plate-like LiMnPO₄ particles were prepared by polyol method. The chemical and physical properties of plate-like LiMnPO₄ particles were characterized by XRD and SEM. The thickness of plate-like LiMnPO₄ particles was approximately 35 nm. XRD pattern of plate-like LiMnPO₄ was good agreement with orthorhombic olivine structure. The first discharge capacity of C/LiMnPO₄ cathode was approximately 95 mAh/g. 99.9 % of initial discharge capacity was maintained after 100 cycles.

Abstract: Spherical LiFePO₄/C precursor powders were successfully prepared by spray pyrolysis. Various types of organic compounds such as glycolic acid, malic acid, citric acid, fructose and sucrose were used as carbon sources. X-ray diffraction analysis revealed that the olivine phase was obtained by calcining over 600 °C under an argon (95%)/hydrogen (5%) atmosphere. The particles exhibited a spherical morphology with approximately 1.5 μm. LiFePO₄/C cathode derived from sucrose exhibited higher rechargeable capacity and cycle stability. The rechargeable capacity of LiFePO₄/C cathode was approximately 154 mAh/g at 1 C. 90% of initial discharge capacity was maintained after 100 cycles.