Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes
Abstract
The ability to characterize bulk and interfacial transport properties of polymer electrolytes is critical to realizing their potential applications in electrochemical energy storage devices. In this paper, we leverage custom microfabricated interdigitated electrode array (IDEs) as a platform to probe ion transport properties of polymer electrolytes films through electrochemical impedance spectroscopy (EIS) measurements. Using poly(ethylene oxide) (PEO) blended with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) as a model dry polymer electrolyte system, we investigate how geometric parameters of the IDEs influence the quality and analysis of EIS measurements. By focusing on films on the nanometer film thickness (ca. 50 nm), EIS measurements revealed diffusional processes near the electrode/polymer interface that may be difficult to observe with conventional thick films. Moreover, irreversible impedance spectra were observed at elevated temperatures when using IDEs with large electrode metal fractions. These irreversible processes were eliminated through passivation of the IDE with different oxides (SiO2, Al2O3, or TiO2). Ultimately, the ionic conductivity of PEO-LiTFSI electrolytes is confidently determined when appropriate IDE geometries and equivalent circuits are used. Lastly, our work demonstrates the use of IDEs and nanothin polymer electrolytes films as a versatile platform for rapid and efficient interrogation of both bulk and interfacial electrochemical properties.
- Authors:
-
[1];
[2];
[2];
[2];
[2];
[2];
[1];
[1];
[1]
- Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
- Univ. of Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1487126
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 165; Journal Issue: 16; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Films; Interdigitated electrodes; Polymer; Thin films
Citation Formats
Sharon, Daniel, Bennington, Peter, Liu, Claire, Kambe, Yu, Dong, Ban Xuan, Burnett, Veronica F., Dolejsi, Moshe, Grocke, Garrett, Patel, Shrayesh N., and Nealey, Paul F. Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes. United States: N. p., 2018.
Web. doi:10.1149/2.0291816jes.
Sharon, Daniel, Bennington, Peter, Liu, Claire, Kambe, Yu, Dong, Ban Xuan, Burnett, Veronica F., Dolejsi, Moshe, Grocke, Garrett, Patel, Shrayesh N., & Nealey, Paul F. Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes. United States. https://doi.org/10.1149/2.0291816jes
Sharon, Daniel, Bennington, Peter, Liu, Claire, Kambe, Yu, Dong, Ban Xuan, Burnett, Veronica F., Dolejsi, Moshe, Grocke, Garrett, Patel, Shrayesh N., and Nealey, Paul F. Sat .
"Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes". United States. https://doi.org/10.1149/2.0291816jes. https://www.osti.gov/servlets/purl/1487126.
@article{osti_1487126,
title = {Interrogation of Electrochemical Properties of Polymer Electrolyte Thin Films with Interdigitated Electrodes},
author = {Sharon, Daniel and Bennington, Peter and Liu, Claire and Kambe, Yu and Dong, Ban Xuan and Burnett, Veronica F. and Dolejsi, Moshe and Grocke, Garrett and Patel, Shrayesh N. and Nealey, Paul F.},
abstractNote = {The ability to characterize bulk and interfacial transport properties of polymer electrolytes is critical to realizing their potential applications in electrochemical energy storage devices. In this paper, we leverage custom microfabricated interdigitated electrode array (IDEs) as a platform to probe ion transport properties of polymer electrolytes films through electrochemical impedance spectroscopy (EIS) measurements. Using poly(ethylene oxide) (PEO) blended with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) as a model dry polymer electrolyte system, we investigate how geometric parameters of the IDEs influence the quality and analysis of EIS measurements. By focusing on films on the nanometer film thickness (ca. 50 nm), EIS measurements revealed diffusional processes near the electrode/polymer interface that may be difficult to observe with conventional thick films. Moreover, irreversible impedance spectra were observed at elevated temperatures when using IDEs with large electrode metal fractions. These irreversible processes were eliminated through passivation of the IDE with different oxides (SiO2, Al2O3, or TiO2). Ultimately, the ionic conductivity of PEO-LiTFSI electrolytes is confidently determined when appropriate IDE geometries and equivalent circuits are used. Lastly, our work demonstrates the use of IDEs and nanothin polymer electrolytes films as a versatile platform for rapid and efficient interrogation of both bulk and interfacial electrochemical properties.},
doi = {10.1149/2.0291816jes},
journal = {Journal of the Electrochemical Society},
number = 16,
volume = 165,
place = {United States},
year = {2018},
month = {12}
}
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Nanothin film conductivity measurements reveal interfacial influence on ion transport in polymer electrolytes
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