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Structure and electrochemistry of FePO4∙2H2O hydrate

Abstract : We report the structural and electrochemical characteristics of FePO4 dihydrate exhibiting a monoclinic structure (P21/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 [FePO4] framework. The electrode FePO4·2H2O 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.
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https://hal.archives-ouvertes.fr/hal-00017249
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Submitted on : Wednesday, January 18, 2006 - 11:22:18 AM
Last modification on : Friday, April 9, 2021 - 10:28:04 AM

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K. Zaghib, Christian Julien. Structure and electrochemistry of FePO4∙2H2O hydrate. Journal of Power Sources, Elsevier, 2005, 142 (1-2), pp.279. ⟨10.1016/j.jpowsour.2004.09.042⟩. ⟨hal-00017249⟩

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