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

文献情報

出版日 2014-03-20

DOI 10.1039/C4CP01089B

インパクトファクター 3.676

著者

Montserrat Galceran, Damien Saurel, Begoña Acebedo, Vladimir V. Roddatis, Egoitz Martin, Montse Casas-Cabanas

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要旨

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.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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