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Understanding dehydration of Prussian white : from material to aqueous processed composite electrodes for sodium-ion battery application
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Maddar, Faduma, Walker, David, Chamberlain, Thomas W., Compton, Jacob, Menon, Ashok S., Copley, Mark and Hasa, Ivana (2023) Understanding dehydration of Prussian white : from material to aqueous processed composite electrodes for sodium-ion battery application. Journal of Materials Chemistry A, 11 . pp. 15778-15791. doi:10.1039/D3TA02570E ISSN 2050-7496.
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Official URL: https://doi.org/10.1039/D3TA02570E
Abstract
Prussian blue analogues (PBAs) have attracted much attention as potential cathode materials for sodium-ion battery (SIBs) applications. The presence of water in these compounds plays a significant role on the electrochemical behaviour, highlighting the importance of a comprehensive understanding of the dehydration process. Herein, we investigate the properties and the dehydration effects on the structural, morphological, and electrochemical properties of a Prussian White (PW) cathode material (Na2−xFe[Fe(CN)6]1−y·zH2O). The use of such material as well as the water-based electrode processing method employed matches the requirements for low toxicity, cost, and resource abundance in large-scale applications. By combining temperature dependent in situ X-ray diffraction analysis, ex situ structural and morphological investigation and electrochemical characterization, it is found that water removal is a kinetically driven process that is strongly affected by the experimental conditions (e.g., temperature, heating rate, atmosphere) and the environment of the PW system (material vs. composite electrode). This study addresses the challenges driven by the presence of surface adsorbed and interstitial water in PW systems and offers insights into the processability of water-based PW electrodes and their electrochemical response under different dehydration conditions. Optimal conditions to transition from a sodium-rich hydrated monoclinic phase toward a sodium-rich dehydrated rhombohedral phase are identified and are found to be different when comparing data from PW material in its powder form and PW material within a composite electrode for SIB application.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
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Library of Congress Subject Headings (LCSH): | Sodium ion batteries, Electric batteries -- Electrodes, Prussian blue , Cathodes, X-ray diffraction imaging | |||||||||
Journal or Publication Title: | Journal of Materials Chemistry A | |||||||||
Publisher: | Royal Society of Chemistry | |||||||||
ISSN: | 2050-7496 | |||||||||
Official Date: | 7 August 2023 | |||||||||
Dates: |
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Volume: | 11 | |||||||||
Page Range: | pp. 15778-15791 | |||||||||
DOI: | 10.1039/D3TA02570E | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Copyright Holders: | Creative Commons Attribution 3.0 Unported Licence | |||||||||
Date of first compliant deposit: | 9 August 2023 | |||||||||
Date of first compliant Open Access: | 9 August 2023 | |||||||||
RIOXX Funder/Project Grant: |
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