Conductivity of carbonate- and perfluoropolyether-based electrolytes in porous separators
Abstract
In lithium batteries, a porous separator filled with an electrolyte is placed in between the electrodes. Properties of the separator such as porosity and wettability strongly influence the conductivity of the electrolyte-separator composite. This work focuses on three commercial separators: a single layer polypropylene (Celgard 2500), a trilayer polypropylene-polyethylene-polypropylene (PP-PE-PP), and a porous polytetrafluoroethylene (PTFE). Electron microscopy was used to characterize the pore structure, and these experiments reveal large differences in pore morphology. The separators were soaked in both carbonate- and perfluoropolyether-based electrolytes. The conductivity of the neat electrolytes (σ0) varied from 6.46 × 10-6 to 1.76 × 10-2 S cm-1. The porosity and wettability of the separator affect the electrolyte uptake that in turn affect the conductivity of electrolyte-separator composites. The conductivity of the electrolyte-separator composites (σ) was found to follow a master equation, σ = 0.51·σ0·Φc3.2±0.2, where Φc is the volume fraction of the electrolyte in each separator.
- Authors:
-
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- University of North Carolina, Chapel Hill, NC (United States); North Carolina State University, Raleigh, NC (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Stony Brook Univ., NY (United States). Center for Mesoscale Transport Properties (m2M)
- OSTI Identifier:
- 1474956
- Alternate Identifier(s):
- OSTI ID: 1326406
- Grant/Contract Number:
- AC02-05CH11231; SC0012673
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 323; Journal Issue: C; Related Information: © 2016 Elsevier B.V. All rights reserved.; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; perfluoropolyether; conductivity; separators; battery; polyolefin; polytetrafluoroethylene
Citation Formats
Devaux, Didier, Chang, Yu H., Villaluenga, Irune, Chen, X. Chelsea, Chintapalli, Mahati, DeSimone, Joseph M., and Balsara, Nitash P. Conductivity of carbonate- and perfluoropolyether-based electrolytes in porous separators. United States: N. p., 2016.
Web. doi:10.1016/j.jpowsour.2016.05.039.
Devaux, Didier, Chang, Yu H., Villaluenga, Irune, Chen, X. Chelsea, Chintapalli, Mahati, DeSimone, Joseph M., & Balsara, Nitash P. Conductivity of carbonate- and perfluoropolyether-based electrolytes in porous separators. United States. https://doi.org/10.1016/j.jpowsour.2016.05.039
Devaux, Didier, Chang, Yu H., Villaluenga, Irune, Chen, X. Chelsea, Chintapalli, Mahati, DeSimone, Joseph M., and Balsara, Nitash P. Fri .
"Conductivity of carbonate- and perfluoropolyether-based electrolytes in porous separators". United States. https://doi.org/10.1016/j.jpowsour.2016.05.039. https://www.osti.gov/servlets/purl/1474956.
@article{osti_1474956,
title = {Conductivity of carbonate- and perfluoropolyether-based electrolytes in porous separators},
author = {Devaux, Didier and Chang, Yu H. and Villaluenga, Irune and Chen, X. Chelsea and Chintapalli, Mahati and DeSimone, Joseph M. and Balsara, Nitash P.},
abstractNote = {In lithium batteries, a porous separator filled with an electrolyte is placed in between the electrodes. Properties of the separator such as porosity and wettability strongly influence the conductivity of the electrolyte-separator composite. This work focuses on three commercial separators: a single layer polypropylene (Celgard 2500), a trilayer polypropylene-polyethylene-polypropylene (PP-PE-PP), and a porous polytetrafluoroethylene (PTFE). Electron microscopy was used to characterize the pore structure, and these experiments reveal large differences in pore morphology. The separators were soaked in both carbonate- and perfluoropolyether-based electrolytes. The conductivity of the neat electrolytes (σ0) varied from 6.46 × 10-6 to 1.76 × 10-2 S cm-1. The porosity and wettability of the separator affect the electrolyte uptake that in turn affect the conductivity of electrolyte-separator composites. The conductivity of the electrolyte-separator composites (σ) was found to follow a master equation, σ = 0.51·σ0·Φc3.2±0.2, where Φc is the volume fraction of the electrolyte in each separator.},
doi = {10.1016/j.jpowsour.2016.05.039},
journal = {Journal of Power Sources},
number = C,
volume = 323,
place = {United States},
year = {Fri May 20 00:00:00 EDT 2016},
month = {Fri May 20 00:00:00 EDT 2016}
}
Web of Science
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