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Title: Analysis of electrolyte imbibition through lithium-ion battery electrodes

Abstract

A quantitative measurement of wettability between the porous electrode and the electrolyte in lithium-ion batteries can greatly improve our understanding of wetting behavior. Although the wetting balance method is widely used to measure the electrolyte transport rate in the porous electrodes, it suffers from several drawbacks and has limited accuracy. We here presented a combined experimental and theoretical investigation of the dynamics of electrolyte imbibition through electrodes. We suggested a novel method to accurately measure the electrolyte imbibition rate. Excellent agreement between the experimental data and the developed analytical model is obtained. The coefficient of penetrance (COP) and the solid permeability coefficient (SPC) are identified as important parameters, i.e., the electrolyte with higher COP value wets faster into an electrode, whereas for an electrolyte, the electrode with higher SPC value is more amenable to be impregnated. The effect of electrolyte salt concentration and electrolyte solvent has been studied in detail. The result implies that increasing salt concentration adversely influences electrolyte wetting rate, whereas switching from EC-DEC system to EC-EMC system improves electrolyte wetting rate. Moreover, for the electrolytes tested in this study, the imbibition into the uncalendered graphite anode is much faster than that into the uncalendered NMC532 cathode.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [1];  [1]
  1. Binghamton Univ., Binghamton, NY (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Science and Technology Beijing, Beijing (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1505294
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 424; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; Lithium-ion battery; Formation process; Electrolyte wetting; Wettability; Imbibition rate

Citation Formats

Davoodabadi, Ali, Li, Jianlin, Liang, Yongfeng, Wood, David L., Singler, Timothy J., and Jin, Congrui. Analysis of electrolyte imbibition through lithium-ion battery electrodes. United States: N. p., 2019. Web. doi:10.1016/j.jpowsour.2019.03.115.
Davoodabadi, Ali, Li, Jianlin, Liang, Yongfeng, Wood, David L., Singler, Timothy J., & Jin, Congrui. Analysis of electrolyte imbibition through lithium-ion battery electrodes. United States. doi:10.1016/j.jpowsour.2019.03.115.
Davoodabadi, Ali, Li, Jianlin, Liang, Yongfeng, Wood, David L., Singler, Timothy J., and Jin, Congrui. Tue . "Analysis of electrolyte imbibition through lithium-ion battery electrodes". United States. doi:10.1016/j.jpowsour.2019.03.115.
@article{osti_1505294,
title = {Analysis of electrolyte imbibition through lithium-ion battery electrodes},
author = {Davoodabadi, Ali and Li, Jianlin and Liang, Yongfeng and Wood, David L. and Singler, Timothy J. and Jin, Congrui},
abstractNote = {A quantitative measurement of wettability between the porous electrode and the electrolyte in lithium-ion batteries can greatly improve our understanding of wetting behavior. Although the wetting balance method is widely used to measure the electrolyte transport rate in the porous electrodes, it suffers from several drawbacks and has limited accuracy. We here presented a combined experimental and theoretical investigation of the dynamics of electrolyte imbibition through electrodes. We suggested a novel method to accurately measure the electrolyte imbibition rate. Excellent agreement between the experimental data and the developed analytical model is obtained. The coefficient of penetrance (COP) and the solid permeability coefficient (SPC) are identified as important parameters, i.e., the electrolyte with higher COP value wets faster into an electrode, whereas for an electrolyte, the electrode with higher SPC value is more amenable to be impregnated. The effect of electrolyte salt concentration and electrolyte solvent has been studied in detail. The result implies that increasing salt concentration adversely influences electrolyte wetting rate, whereas switching from EC-DEC system to EC-EMC system improves electrolyte wetting rate. Moreover, for the electrolytes tested in this study, the imbibition into the uncalendered graphite anode is much faster than that into the uncalendered NMC532 cathode.},
doi = {10.1016/j.jpowsour.2019.03.115},
journal = {Journal of Power Sources},
number = C,
volume = 424,
place = {United States},
year = {2019},
month = {4}
}

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This content will become publicly available on April 2, 2020
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