Salt Concentration-Regulated Desalination Mechanism Evolution in Battery Deionization for Freshwater

Wei, W; Feng, X; Chen, Z; Wang, R; Chen, H

Salt Concentration-Regulated Desalination Mechanism Evolution in Battery Deionization for Freshwater

Wei, W Feng, X Chen, Z

Wang, R Chen, H

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS Sustainable Chemistry and Engineering, 2022, 10, (29), pp. 9295-9302
Issue Date:: 2022-07-25

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Field	Value	Language
dc.contributor.author	Wei, W
dc.contributor.author	Feng, X
dc.contributor.author	Chen, Z https://orcid.org/0000-0003-0627-0856
dc.contributor.author	Wang, R
dc.contributor.author	Chen, H
dc.date.accessioned	2023-04-11T05:30:54Z
dc.date.available	2023-04-11T05:30:54Z
dc.date.issued	2022-07-25
dc.identifier.citation	ACS Sustainable Chemistry and Engineering, 2022, 10, (29), pp. 9295-9302
dc.identifier.issn	2168-0485
dc.identifier.issn	2168-0485
dc.identifier.uri	http://hdl.handle.net/10453/169599
dc.description.abstract	Battery deionization (BDI) based on the Faradaic process featuring with large ion storage capacity and a high energy efficiency holds great prospects for the next-generation desalination application. Owing to the intrinsic salt ion insertion and the electrochemical redox nature of BDI, the ion insertion dynamics within the electrode during the electrochemical redox processes could be strongly influenced by the properties of the electrolyte, especially the salt concentration. Although tremendous effort has been devoted to developing the BDI electrode materials, the relationship between the detailed desalination dynamics and salt concentration in electrolytes has never been systematically studied since the invention of this technology. To unveil the underlying behaviors, we have employed the NaTi2(PO4)3@C electrode as the representative BDI electrode and systematically investigated the electrochemical desalination dynamics under different concentration NaCl solutions. For the first time, standard freshwater has been obtained from NaCl solution via the BDI technique. Interestingly, the intrinsic desalination mechanism evolves from a diffusion-controlled charge contribution process into the capacitive charge contribution-dominated process as the NaCl concentration in water decreases from normal saline water into freshwater. The present study demonstrated the possibility of achieving freshwater with BDI. The insights obtained here on the ion storage dynamics paves the way for developing high-efficiency BDI electrodes toward practical desalination applications for freshwater.
dc.language	English
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS Sustainable Chemistry and Engineering
dc.relation.isbasedon	10.1021/acssuschemeng.2c00815
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0301 Analytical Chemistry, 0502 Environmental Science and Management, 0904 Chemical Engineering
dc.title	Salt Concentration-Regulated Desalination Mechanism Evolution in Battery Deionization for Freshwater
dc.type	Journal Article
utslib.citation.volume	10
utslib.for	0301 Analytical Chemistry
utslib.for	0502 Environmental Science and Management
utslib.for	0904 Chemical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-11T05:30:53Z
pubs.issue	29
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	29

Abstract:

Battery deionization (BDI) based on the Faradaic process featuring with large ion storage capacity and a high energy efficiency holds great prospects for the next-generation desalination application. Owing to the intrinsic salt ion insertion and the electrochemical redox nature of BDI, the ion insertion dynamics within the electrode during the electrochemical redox processes could be strongly influenced by the properties of the electrolyte, especially the salt concentration. Although tremendous effort has been devoted to developing the BDI electrode materials, the relationship between the detailed desalination dynamics and salt concentration in electrolytes has never been systematically studied since the invention of this technology. To unveil the underlying behaviors, we have employed the NaTi2(PO4)3@C electrode as the representative BDI electrode and systematically investigated the electrochemical desalination dynamics under different concentration NaCl solutions. For the first time, standard freshwater has been obtained from NaCl solution via the BDI technique. Interestingly, the intrinsic desalination mechanism evolves from a diffusion-controlled charge contribution process into the capacitive charge contribution-dominated process as the NaCl concentration in water decreases from normal saline water into freshwater. The present study demonstrated the possibility of achieving freshwater with BDI. The insights obtained here on the ion storage dynamics paves the way for developing high-efficiency BDI electrodes toward practical desalination applications for freshwater.

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http://hdl.handle.net/10453/169599