Is LiFePO4 stable in water?

被引：99

作者：

Porcher, W. ^{[1
]}

Moreau, P. ^{[2
]}

Lestriez, B. ^{[2
]}

Jouanneau, S. ^{[1
]}

Guyomard, D. ^{[2
,3
]}

机构：

[1] Commissariat À l'Énergie Atomique

[2] Institut des Mat́riaux Jean Rouxel, CNRS UMR 6502, Universit́ de Nantes

来源：

Electrochemical and Solid-State Letters | 2008年 / 11卷 / 01期

关键词：

Chemical analysis - Electrodes - Energy dissipation - Iron compounds - pH effects - Transmission electron microscopy - Water;

D O I：

10.1149/1.2795833

中图分类号：

学科分类号：

摘要：

The stability of LiFePO4 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 Li3 PO4 layer is present at the LiFePO4 grains surface after immersion in water. This layer, which is a few nanometers thick, is accompanied by an increase of the FeIII percentage in the grains and a continuous dissolution of the layer. If experimental conditions such as immersion time, pH, and LiFePO4 concentration are set to optimal values, the transition to an aqueous route for preparing LiFePO4 -based positive electrodes could, in fact, be achieved. © 2007 The Electrochemical Society.

引用

页码：A4 / A8

页数：4

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