Mechanical Degradation of Graphite/PVDF Composite Electrodes: A Model-Experimental Study
Abstract
Mechanical failure modes of a graphite/polyvinylidene difluoride (PVDF) composite electrode for lithium-ion batteries were investigated by combining realistic stress-stain tests and mathematical model predictions. Samples of PVDF mixed with conductive additive were prepared in a similar way to graphite electrodes and tested while submerged in electrolyte solution. Young's modulus and tensile strength values of wet samples were found to be approximately one-fifth and one-half of those measured for dry samples. Simulations of graphite particles surrounded by binder layers given the measured material property values suggest that the particles are unlikely to experience mechanical damage during cycling, but that the fate of the surrounding composite of PVDF and conductive additive depends completely upon the conditions under which its mechanical properties were obtained. Simulations using realistic property values produced results that were consistent with earlier experimental observations.
- Authors:
-
- Toyota Motor Corp., Aichi (Japan); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- OSTI Identifier:
- 1378948
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 163; Journal Issue: 3; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; 36 MATERIALS SCIENCE; binder; composite electrode; diffusion-induced stress; graphite; mathematical model; PVDF; stress-strain testing
Citation Formats
Takahashi, Kenji, Higa, Kenneth, Mair, Sunil, Chintapalli, Mahati, Balsara, Nitash, and Srinivasan, Venkat. Mechanical Degradation of Graphite/PVDF Composite Electrodes: A Model-Experimental Study. United States: N. p., 2015.
Web. doi:10.1149/2.0271603jes.
Takahashi, Kenji, Higa, Kenneth, Mair, Sunil, Chintapalli, Mahati, Balsara, Nitash, & Srinivasan, Venkat. Mechanical Degradation of Graphite/PVDF Composite Electrodes: A Model-Experimental Study. United States. https://doi.org/10.1149/2.0271603jes
Takahashi, Kenji, Higa, Kenneth, Mair, Sunil, Chintapalli, Mahati, Balsara, Nitash, and Srinivasan, Venkat. Fri .
"Mechanical Degradation of Graphite/PVDF Composite Electrodes: A Model-Experimental Study". United States. https://doi.org/10.1149/2.0271603jes. https://www.osti.gov/servlets/purl/1378948.
@article{osti_1378948,
title = {Mechanical Degradation of Graphite/PVDF Composite Electrodes: A Model-Experimental Study},
author = {Takahashi, Kenji and Higa, Kenneth and Mair, Sunil and Chintapalli, Mahati and Balsara, Nitash and Srinivasan, Venkat},
abstractNote = {Mechanical failure modes of a graphite/polyvinylidene difluoride (PVDF) composite electrode for lithium-ion batteries were investigated by combining realistic stress-stain tests and mathematical model predictions. Samples of PVDF mixed with conductive additive were prepared in a similar way to graphite electrodes and tested while submerged in electrolyte solution. Young's modulus and tensile strength values of wet samples were found to be approximately one-fifth and one-half of those measured for dry samples. Simulations of graphite particles surrounded by binder layers given the measured material property values suggest that the particles are unlikely to experience mechanical damage during cycling, but that the fate of the surrounding composite of PVDF and conductive additive depends completely upon the conditions under which its mechanical properties were obtained. Simulations using realistic property values produced results that were consistent with earlier experimental observations.},
doi = {10.1149/2.0271603jes},
journal = {Journal of the Electrochemical Society},
number = 3,
volume = 163,
place = {United States},
year = {Fri Dec 11 00:00:00 EST 2015},
month = {Fri Dec 11 00:00:00 EST 2015}
}
Web of Science
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