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Conference Papers ECS Transactions Year : 2011

Synthesis of New Fluorosulphate Materials Using Different Approaches

Abstract

Searching for possible new cathode materials with the ability to outperform LiFePO4, our group has recently discovered LiFeSO4F, a novel metal fluorosulphate compound. Needing no further optimization, it delivers excellent reversible capacity (~140 mAh/g) involving a 3.6 V FeII/III redox plateau. This parent fluorosulphate phase has been synthesized by three different routes, namely ionothermal synthesis, solid-state synthesis and polyol-assisted synthesis. These low temperature processing routes are described focusing on synthesis of LiFeSO4F. Furthermore, these methods were successfully employed to unravel other LiMSO4F compounds (M = Co/Ni/Mn/Zn) as well as sodium-based metal fluorosulphate NaMSO4F compounds (M = Fe/Co/Ni/Mn). These syntheses were realized at temperature not exceeding 300°C. We have discovered many interesting and at times intriguing structural, electrochemical and transport properties in these fluorosulphate materials. A few of these findings are illustrated to show the richness of the metal fluorosulphate chemistry.
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hal-00815534 , version 1 (18-04-2013)

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Mohammed Ati, Moulay Tahar Sougrati, Nadir Recham, Prabeer Barpanda, Marine Reynaud, et al.. Synthesis of New Fluorosulphate Materials Using Different Approaches. 219th ECS Meeting, 2010, United States. pp.57-63, ⟨10.1149/1.3655687⟩. ⟨hal-00815534⟩
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