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Instruments / Technical Area	Publication Details	Published	Actions
I09-Surface and Interface Structural Analysis	Selective control of composition in Prussian white for enhanced material properties William R. Brant , Ronnie Mogensen , Simon Colbin , Dickson O. Ojwang , Siegbert Schmid , Lennart Häggström , Tore Ericsson , Aleksander Jaworski , Andrew J. Pell , Reza Younesi Chemistry Of Materials DOI: 10.1021/acs.chemmater.9b01494 Diamond Proposal Number(s): [17901] Show Abstract ▼ Abstract: Sodium ion batteries based on Prussian blue analogues (PBAs) are ideal for large scale energy storage applications due to the ability to meet the huge volumes and low costs required. For Na2-xFe[Fe(CN)6]1-y.zH2O realising its commercial potential means fine control of the concentration of sodium, Fe(CN)6 vacancies and water content. To date, there is a huge variation in the literature of composition leading to variable electrochemical performance. In this work, we break down the synthesis of Prussian blue analogous (PBAs) into three steps for controlling the sodium, vacancy and water content via an inexpen-sive, scalable synthesis method. We produce rhombohedral Prussian white Na1.88(5)Fe[Fe(CN)6].0.18(9)H2O with an initial capacity of 158 mAhg-1 retaining 90% capacity after 50 cycles. Subsequent characterisation revealed that the increased polarisation on the 3 V plateau is coincident with a phase transition and reduced utilisation of the high spin Fe(III)/Fe(II) redox couple. This reveals a clear target for subsequent improvements of the material to boost long term cycling stability. These results will be of great interest for the myriad of applications PBAs are suited towards such as catalysis, magnetism, electrochromics and gas sorption.	Aug 2019

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I09-Surface and Interface Structural Analysis

Selective control of composition in Prussian white for enhanced material properties

William R. Brant , Ronnie Mogensen , Simon Colbin , Dickson O. Ojwang , Siegbert Schmid , Lennart Häggström , Tore Ericsson , Aleksander Jaworski , Andrew J. Pell , Reza Younesi

Chemistry Of Materials

DOI: 10.1021/acs.chemmater.9b01494

Diamond Proposal Number(s): [17901]

Show Abstract ▼

Aug 2019