More on the reactivity of olivine LiFePO4 nano-particles with atmosphere at moderate temperature

Jean Frédéric Martin, Marine Cuisinier, Nicolas Dupré, Atsuo Yamada, Ryoji Kanno, Dominique Guyomard

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The changes appearing for LiFePO4-C nano-composites exposed to atmosphere at 120 °C have been structurally and chemically examined by the use of TGA, XRD, XPS, Mössbauer, 7Li MAS NMR and electrochemical methods. The results conclude that a highly disordered phase resulting from the aging of LiFePO4 appears on the surface of the grains of the material, is assigned to a phosphate phase and can insert lithium around 2.6 V with poor reversibility. The essential role of water has been investigated and clearly demonstrated. Thus, the aging mechanism occurring in hot humid air is completely different from a simple oxidation as well as from the aging process observed above 150 °C and involves the incorporation of hydroxyl groups. In addition, Fe2O3 formation has not been observed for such an aging in mild conditions.

Original languageEnglish
Pages (from-to)2155-2163
Number of pages9
JournalJournal of Power Sources
Volume196
Issue number4
DOIs
Publication statusPublished - 15 Feb 2011
Externally publishedYes

Fingerprint

Olivine
olivine
reactivity
Aging of materials
atmospheres
high temperature air
Temperature
temperature
inserts
Lithium
Hydroxyl Radical
phosphates
Phosphates
X ray photoelectron spectroscopy
lithium
Nuclear magnetic resonance
Oxidation
nuclear magnetic resonance
oxidation
composite materials

Keywords

  • Aging
  • LiFePO
  • Lithium batteries

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

More on the reactivity of olivine LiFePO4 nano-particles with atmosphere at moderate temperature. / Martin, Jean Frédéric; Cuisinier, Marine; Dupré, Nicolas; Yamada, Atsuo; Kanno, Ryoji; Guyomard, Dominique.

In: Journal of Power Sources, Vol. 196, No. 4, 15.02.2011, p. 2155-2163.

Research output: Contribution to journalArticle

Martin, Jean Frédéric ; Cuisinier, Marine ; Dupré, Nicolas ; Yamada, Atsuo ; Kanno, Ryoji ; Guyomard, Dominique. / More on the reactivity of olivine LiFePO4 nano-particles with atmosphere at moderate temperature. In: Journal of Power Sources. 2011 ; Vol. 196, No. 4. pp. 2155-2163.
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AU - Guyomard, Dominique

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