Strategies for synthesis of Prussian blue analogues

Solveig Kjeldgaard; Iulian Dugulan; Aref Mamakhel; Marnix Wagemaker; Bo Brummerstedt Iversen; Anders Bentien

doi:10.1098/rsos.201779

Strategies for synthesis of Prussian blue analogues

R Soc Open Sci. 2021 Jan 13;8(1):201779. doi: 10.1098/rsos.201779. eCollection 2021 Jan.

Authors

Solveig Kjeldgaard^{1

2}, Iulian Dugulan³, Aref Mamakhel², Marnix Wagemaker³, Bo Brummerstedt Iversen², Anders Bentien¹

Affiliations

¹ Department of Engineering, Aarhus University, Aarhus, Denmark.
² Department of Chemistry, Aarhus University, Aarhus, Denmark.
³ Department of Radiation Science and Technology, Technical University Delft, Delft, The Netherlands.

Abstract

We report a comparison of different common synthetic strategies for preparation of Prussian blue analogues (PBA). PBA are promising as cathode material for a number of different battery types, including K-ion and Na-ion batteries with both aqueous and non-aqueous electrolytes. PBA exhibit a significant degree of structural variation. The structure of the PBA determines the electrochemical performance, and it is, therefore, important to understand how synthesis parameters affect the structure of the obtained product. PBA are often synthesized by co-precipitation of a metal salt and a hexacyanoferrate complex, and parameters such as concentration and oxidation state of the precursors, flow rate, temperature and additional salts can all potentially affect the structure of the product. Here, we report 12 different syntheses and compare the structure of the obtained PBA materials.

Keywords: Prussian blue analogues; battery; storage; synthesis.

Associated data

figshare/10.6084/m9.figshare.c.5251010