More insights into Wadsley-Roth phases FeNb11O29 obtained by ultrafast solid-state micro-wave synthesis as Li-ion batteries anode materials
Next generation of electrode materials for batteries will need to exhibit high performance at important current rate. In this context, the Wadsley-Roth family recently attracted the attention, for example composition FeNb11O29 existing in monoclinic and orthorhombic forms, for which a high capacity of 400 mAh/g has been achieved. In the search for faster and cost-effective synthesis protocols, we recently discovered that microwave-assisted heating offers the two polymorphs in few minutes. XPS analysis revealed the presence of additional Nb4+ cations, and consequently the possibility of having oxygen vacancies, which can be directly quantified by ND. Besides, we want to better characterize the materials during electrochemical lithiation. Operando ND can give the exact localization of lithium ions at different states of charge and dynamical information on the diffusion of Li+. Ex situ and operando ND can help to answer some questions: does monoclinic/orthorhombic difference remain upon electrochemical lithiation, is there a preferential Li+ distribution in the intermediate compositions, is there some crystallographic limitation that could explain capacity fading at high current?
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The recommended format for citing this dataset in a research publication is in the following format:
Berthelot; LE THANH Dat and SUARD Emmanuelle. (2023). More insights into Wadsley-Roth phases FeNb11O29 obtained by ultrafast solid-state micro-wave synthesis as Li-ion batteries anode materials. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-24-713
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