A novel route for FePO4 olivine synthesis from sarcopside oxidation

作者：Crouzet Camille^*; Recham Nadir^*; Brunet Fabrice; Findling Nathaniel; David Renald; Sougrati Moulay Tahar

来源：Solid State Sciences, 2016, 62: 29-33.

DOI：10.1016/j.solidstatesciences.2016.10.013

• Hydrothermal synthesis
• Heterosite
• Sarcopside
• Batteries
• Exsolution process
• Mossbauer

Heterosite FePO4 is synthesized for the first time by direct thermal oxidation of sarcopside Fe-3(PO4)(2). Both FePO4 and Fe-3(PO4)(2) have a pseudo olivine structure. Complete isostructural conversion of sarcopside into FePO4 is achieved at a temperature of 450 degrees C within 3 days according to the reaction Fe-3(PO4)(2) + 3/4 O-2 -> 2 FePO4 + 1/2 Fe2O3 which leads to the extraction of iron from the sarcopside structure. Appropriate heating ramp must be applied in order to avoid the crystallization of Fe-7(PO4)(6). Electrochemical performances of the oxidation product are consistent with those of olivine FePO4.

• 出版日期2016-12