In situ X-ray diffraction characterisation of Fe0.5TiOPO4 and Cu0.5TiOPO4 as electrode material for sodium-ion batteries

[Display omitted] Na-ion batteries might become a low-cost alternative to Li-ion batteries in the future. Suitable electrode materials, especially anode materials, are needed for Na-ion batteries. As possible candidates Cu0.5TiOPO4 and Fe0.5TiOPO4 were tested. While Cu0.5TiOPO4 does not react with N...

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Bibliographic Details
Published in:Electrochimica acta 2015-09, Vol.176, p.18-21
Main Authors: Bleith, Peter, Kaiser, Hermann, Novák, Petr, Villevieille, Claire
Format: Article
Language:English
Subjects:
Chemical Sciences
Electric power
Engineering Sciences
in situ
Material chemistry
Na-ion batteries
operando
oxyphosphate
XRD
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Summary:[Display omitted] Na-ion batteries might become a low-cost alternative to Li-ion batteries in the future. Suitable electrode materials, especially anode materials, are needed for Na-ion batteries. As possible candidates Cu0.5TiOPO4 and Fe0.5TiOPO4 were tested. While Cu0.5TiOPO4 does not react with Na+, Fe0.5TiOPO4 shows a specific charge of ≈600mAh/g upon the first sodiation and 280mAh/g in the first desodiation. In situ XRD in a new, versatile and reliable in situ cell revealed that Fe0.5TiOPO4 reacts via a conversion type reaction upon sodiation with an amorphisation of the sample.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2015.06.105