Is LiFePO[sub 4] Stable in Water?

The stability of in water was investigated. From high-resolution transmission electron microscopy observation, electron energy-loss spectroscopy analyses, Mössbauer experiments, and chemical analyses, we showed that a layer is present at the grains surface after immersion in water. This layer, which is a few nanometers thick, is accompanied by an increase of the percentage in the grains and a continuous dissolution of the layer. If experimental conditions such as immersion time, pH, and concentration are set to optimal values, the transition to an aqueous route for preparing -based positive electrodes could, in fact, be achieved.