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Issue 19, 2014
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The mechanism of NaFePO4 (de)sodiation determined by in situ X-ray diffraction

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Abstract

The reaction mechanism occurring during the (de)intercalation of sodium into the host olivine FePO4 structure is thoroughly analysed through a combination of structural and electrochemical methods. In situ XRD experiments have confirmed that the charge and discharge reaction mechanisms are different and have revealed the existence of a solid solution domain from 1 < x < 2/3 in NaxFePO4 upon charge. The second part of the charge proceeds through a 2-phase reaction between Na2/3FePO4 and FePO4 with strongly varying solubility limits. The strong cell mismatch between Na2/3FePO4 and FePO4 enhances the effects of the diffuse interface and therefore varying solubility limits are first observed here in micrometric materials.

Graphical abstract: The mechanism of NaFePO4 (de)sodiation determined by in situ X-ray diffraction

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Publication details

The article was received on 01 Oct 2013, accepted on 19 Mar 2014 and first published on 20 Mar 2014


Article type: Paper
DOI: 10.1039/C4CP01089B
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2014,16, 8837-8842
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    The mechanism of NaFePO4 (de)sodiation determined by in situ X-ray diffraction

    M. Galceran, D. Saurel, B. Acebedo, V. V. Roddatis, E. Martin, T. Rojo and M. Casas-Cabanas, Phys. Chem. Chem. Phys., 2014, 16, 8837
    DOI: 10.1039/C4CP01089B

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