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American Chemical Society, Chemistry of Materials, 8(24), p. 1472-1485, 2012

DOI: 10.1021/cm300188a

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Single-Step Synthesis of FeSO4F1−yOHy (0 ≤ y ≤ 1) Positive Electrodes for Li-Based Batteries

Journal article published in 2012 by M. Ati, M.-T. Sougrati ORCID, G. Rousse, N. Recham, M.-L. Doublet, J.-C. Jumas, J.-M. Tarascon
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The recent discovery of electrochemical activity at 3.6 V vs Li+/Li0 in LiFeSO4F has generated widespread research activity in this new family of fluorosulfate electrode materials aiming at either increasing the Fe3+/Fe2+ redox potential, searching for new active members, or extending this family to hydroxyl-fluorosulfates. Here we present a new low temperature single step synthesis of FeSO4F1−yOHy phases using FeF3 and Fe2(SO4)3*nH2O as precursors. Using thorough chemical analytical techniques to test for F− content in conjunction with Mössbauer measurements, we demonstrate the existence of a limited solid solution (0.35