Complete Electrochemical Characterization and Limiting Current of Polyacetal Electrolytes

Choo, Y; Snyder, RL; Shah, NJ; Abel, BA; Coates, GW; Balsara, NP

Complete Electrochemical Characterization and Limiting Current of Polyacetal Electrolytes

Choo, Y

Snyder, RL Shah, NJ Abel, BA Coates, GW Balsara, NP

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Publisher:: ELECTROCHEMICAL SOC INC
Publication Type:: Journal Article
Citation:: Journal of the Electrochemical Society, 2022, 169, (2)
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Choo, Y https://orcid.org/0000-0003-2715-0618
dc.contributor.author	Snyder, RL
dc.contributor.author	Shah, NJ
dc.contributor.author	Abel, BA
dc.contributor.author	Coates, GW
dc.contributor.author	Balsara, NP
dc.date.accessioned	2023-01-31T23:51:01Z
dc.date.available	2023-01-31T23:51:01Z
dc.date.issued	2022-01-01
dc.identifier.citation	Journal of the Electrochemical Society, 2022, 169, (2)
dc.identifier.issn	0013-4651
dc.identifier.issn	1945-7111
dc.identifier.uri	http://hdl.handle.net/10453/165712
dc.description.abstract	We investigate a polyacetal-based electrolyte, poly(1,3,6-Trioxocane) (P(2EO-MO)) mixed with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) salt, and report full electrochemical characterization of the transport parameters and a thermodynamic property in comparison to the previously reported poly(ethylene oxide) (PEO) electrolyte data [D. Gribble et al., J. Electrochem. Soc., 166, A3228 (2019)]. While the steady-state current fraction (?+) of P(2EO-MO) electrolyte is greater than that of PEO electrolyte in the entire salt concentration window we explored, the rigorously defined transference number using Newman s concentrated solution theory ( + t 0) appears to be similar to that of PEO electrolyte. On the basis of full electrochemical characterization, we calculate the salt concentration profile as a function of position in the cell and predict limiting current density (iLL) as a function of salt concentration. Experimental data were compared to the predicted values. The non-monotonic behaviors were observed both in prediction and experimental results with offset peak positions. We find that the limiting current density of P (2EO-MO) electrolyte is systematically lower than that of PEO electrolyte in most of the salt concentrations with the exception of rav = 0.05. It is noteworthy that even though one measure of electrolyte efficacy (?+) is superior in P(2EO-MO) electrolyte, the limiting current density, which is another metric of electrolyte efficacy at high currents, is not greater in P(2EO-MO).
dc.language	English
dc.publisher	ELECTROCHEMICAL SOC INC
dc.relation.ispartof	Journal of the Electrochemical Society
dc.relation.isbasedon	10.1149/1945-7111/ac4f22
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0306 Physical Chemistry (incl. Structural), 0912 Materials Engineering
dc.subject.classification	Energy
dc.title	Complete Electrochemical Characterization and Limiting Current of Polyacetal Electrolytes
dc.type	Journal Article
utslib.citation.volume	169
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0306 Physical Chemistry (incl. Structural)
utslib.for	0912 Materials 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	2023-01-31T23:50:59Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	169
utslib.citation.issue	2

Abstract:

We investigate a polyacetal-based electrolyte, poly(1,3,6-Trioxocane) (P(2EO-MO)) mixed with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) salt, and report full electrochemical characterization of the transport parameters and a thermodynamic property in comparison to the previously reported poly(ethylene oxide) (PEO) electrolyte data [D. Gribble et al., J. Electrochem. Soc., 166, A3228 (2019)]. While the steady-state current fraction (?+) of P(2EO-MO) electrolyte is greater than that of PEO electrolyte in the entire salt concentration window we explored, the rigorously defined transference number using Newman s concentrated solution theory ( + t 0) appears to be similar to that of PEO electrolyte. On the basis of full electrochemical characterization, we calculate the salt concentration profile as a function of position in the cell and predict limiting current density (iLL) as a function of salt concentration. Experimental data were compared to the predicted values. The non-monotonic behaviors were observed both in prediction and experimental results with offset peak positions. We find that the limiting current density of P (2EO-MO) electrolyte is systematically lower than that of PEO electrolyte in most of the salt concentrations with the exception of rav = 0.05. It is noteworthy that even though one measure of electrolyte efficacy (?+) is superior in P(2EO-MO) electrolyte, the limiting current density, which is another metric of electrolyte efficacy at high currents, is not greater in P(2EO-MO).

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http://hdl.handle.net/10453/165712