An experimental and modeling study of sodium-ion battery electrolytes

Chayambuka, K; Cardinaels, R; Gering, KL; Raijmakers, L; Mulder, G; Danilov, DL; Notten, PHL

An experimental and modeling study of sodium-ion battery electrolytes

Chayambuka, K Cardinaels, R Gering, KL Raijmakers, L Mulder, G Danilov, DL Notten, PHL

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Power Sources, 2021, 516, pp. 230658
Issue Date:: 2021-12-31

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Field	Value	Language
dc.contributor.author	Chayambuka, K
dc.contributor.author	Cardinaels, R
dc.contributor.author	Gering, KL
dc.contributor.author	Raijmakers, L
dc.contributor.author	Mulder, G
dc.contributor.author	Danilov, DL
dc.contributor.author	Notten, PHL
dc.date.accessioned	2022-01-11T02:28:04Z
dc.date.available	2022-01-11T02:28:04Z
dc.date.issued	2021-12-31
dc.identifier.citation	Journal of Power Sources, 2021, 516, pp. 230658
dc.identifier.issn	0378-7753
dc.identifier.uri	http://hdl.handle.net/10453/152899
dc.description.abstract	Electrolytes play an integral role in the successful operation of any battery chemistry. The reemergence of the sodium-ion battery (SIB) chemistry has therefore rejuvenated the search for optimized SIB salts and solvents. Recent experiments have found that 1 M NaPF6 in ethylene carbonate (EC) and propylene carbonate (PC), EC0.5:PC0.5 (w/w) is the best binary electrolyte for SIBs. However, mathematical models, to elucidate these experimental findings, have so far been lacking. Furthermore, no attempts to understand the effect of EC composition on the conductivity and electrolyte stability have been performed. Herein, the viscosity and conductivity profiles of NaPF6 in EC0.5:PC0.5 electrolyte are unraveled, using experimental and modeling approaches at different temperatures and salt concentrations. The viscosity is measured in a double-wall Couette cell and for the first time, the ionic conductivity is determined using two Pt blocking electrodes in a PAT-Cell electrochemical setup. Modeling is performed using the Advanced Electrolyte Model (AEM), a statistical mechanics software. It is shown that the conductivity and viscosity relationship follows a simple Stokes' law even at a low temperatures and high concentrations. In addition, the stability of binary and ternary electrolytes on hard carbon is shown to correlate with the preferential ion solvation of EC.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of Power Sources
dc.relation.isbasedon	10.1016/j.jpowsour.2021.230658
dc.rights	Journal of Power Sources 516 (2021) 230658 Available online 23 October 2021 0378-7753/© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.title	An experimental and modeling study of sodium-ion battery electrolytes
dc.type	Journal Article
utslib.citation.volume	516
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	recently_added	*
dc.date.updated	2022-01-11T02:28:01Z
pubs.publication-status	Accepted
pubs.volume	516

Abstract:

Electrolytes play an integral role in the successful operation of any battery chemistry. The reemergence of the sodium-ion battery (SIB) chemistry has therefore rejuvenated the search for optimized SIB salts and solvents. Recent experiments have found that 1 M NaPF6 in ethylene carbonate (EC) and propylene carbonate (PC), EC0.5:PC0.5 (w/w) is the best binary electrolyte for SIBs. However, mathematical models, to elucidate these experimental findings, have so far been lacking. Furthermore, no attempts to understand the effect of EC composition on the conductivity and electrolyte stability have been performed. Herein, the viscosity and conductivity profiles of NaPF6 in EC0.5:PC0.5 electrolyte are unraveled, using experimental and modeling approaches at different temperatures and salt concentrations. The viscosity is measured in a double-wall Couette cell and for the first time, the ionic conductivity is determined using two Pt blocking electrodes in a PAT-Cell electrochemical setup. Modeling is performed using the Advanced Electrolyte Model (AEM), a statistical mechanics software. It is shown that the conductivity and viscosity relationship follows a simple Stokes' law even at a low temperatures and high concentrations. In addition, the stability of binary and ternary electrolytes on hard carbon is shown to correlate with the preferential ion solvation of EC.

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http://hdl.handle.net/10453/152899