Structure and electrochemistry of FePO 4·2H 2O hydrate
Abstract
We report the structural and electrochemical characteristics of FePO 4 dihydrate exhibiting a monoclinic structure ( P2 1/ n space group). We have applied Raman and FTIR spectroscopy to study the local structure. Vibrational features analyzed using the molecular group model show the strong inductive effect in the [FePO 4] framework. The electrode FePO 4·2H 2O material inserts 0.7 Li ions per mole leading to coulombic efficiency of 74% for the first cycle and specific capacity of 106 mAh g -1. Infrared spectrum of the lithiated product shows structural modifications due to the lithium insertion and the reduction of iron ions.
- Publication:
-
Journal of Power Sources
- Pub Date:
- 2005
- DOI:
- 10.1016/j.jpowsour.2004.09.042
- Bibcode:
- 2005JPS...142..279Z