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In operando Synchrotron XRD/XAS Investigation of Sodium Insertion into the Prussian Blue Analogue Cathode Material Na 1.32 Mn[Fe(CN) 6 ] 0.83 · z H 2 O

Jonas Sottmann, Fabian L.M. Bernal, Kirill Yusenko, Matthias Herrmann, Hermann Emerich, David S. Wragg, Serena Margadonna Orcid Logo

Electrochimica Acta, Volume: 200, Pages: 305 - 313

Swansea University Authors: Kirill Yusenko, Serena Margadonna Orcid Logo

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DOI (Published version): 10.1016/j.electacta.2016.03.131

Abstract

Prussian Blue Analogues (PBAs) with general formula NaxMA[MB(CN)6]y·z H2O (MA, MB = transition metal) are promising low cost, high rate and high capacity cathodes for sodium ion battery (SIB) technology. Here, we have studied the PBA Na1.32Mn[Fe(CN)6]0.83·z H2O (z = 3.0 and 2.2) with varying structu...

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Published in: Electrochimica Acta
ISSN: 0013-4686
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa26940
Abstract: Prussian Blue Analogues (PBAs) with general formula NaxMA[MB(CN)6]y·z H2O (MA, MB = transition metal) are promising low cost, high rate and high capacity cathodes for sodium ion battery (SIB) technology. Here, we have studied the PBA Na1.32Mn[Fe(CN)6]0.83·z H2O (z = 3.0 and 2.2) with varying structural modifications (monoclinic and cubic) using in operando quasi-simultaneous X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS). We observed a series of reversible structural phase transitions which accompany Na insertion/extraction during electrochemical cycling. The samples show pronounced differences in their galvanostatic charge and discharge profiles which could be linked to structural and electronic response. Different desodiation and sodiation mechanisms were identified. The influence of [Fe(CN)6] vacancies and water content on the electrochemical performance was investigated.
College: Faculty of Science and Engineering
Start Page: 305
End Page: 313

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