Dendrite Suppression by a Polymer Coating: A Coarse‐Grained Molecular Study
Abstract
Abstract A major hurdle to the successful deployment of high‐energy‐density lithium metal based batteries is dendrite growth during battery cycling, which raises safety and cycle life concerns. Coating the Li metal anode with a soft polymer layer has been previously shown to be effective in suppressing dendrite growth, leading to uniform lithium deposition even at high current densities. A 3D coarse‐grained molecular model to study the mechanism of dendrite suppression is presented. It is found that the most effective coatings delay or even prevent dendrites from penetrating the polymer layer during deposition. The optimal deposition can be achieved by jointly tuning the polymer stiffness and relaxation time. Higher polymer dielectric permittivity and coating thickness are also effective, but the deposition rate and, therefore, the charging current density is reduced. These findings provide the basis for rational design of soft polymer coatings for stable lithium deposition.
- Authors:
-
- Department of Chemical Engineering Stanford University Stanford CA 94305 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1599927
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Name: Advanced Functional Materials Journal Volume: 30 Journal Issue: 15; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Kong, Xian, Rudnicki, Paul E., Choudhury, Snehashis, Bao, Zhenan, and Qin, Jian. Dendrite Suppression by a Polymer Coating: A Coarse‐Grained Molecular Study. Germany: N. p., 2020.
Web. doi:10.1002/adfm.201910138.
Kong, Xian, Rudnicki, Paul E., Choudhury, Snehashis, Bao, Zhenan, & Qin, Jian. Dendrite Suppression by a Polymer Coating: A Coarse‐Grained Molecular Study. Germany. https://doi.org/10.1002/adfm.201910138
Kong, Xian, Rudnicki, Paul E., Choudhury, Snehashis, Bao, Zhenan, and Qin, Jian. Mon .
"Dendrite Suppression by a Polymer Coating: A Coarse‐Grained Molecular Study". Germany. https://doi.org/10.1002/adfm.201910138.
@article{osti_1599927,
title = {Dendrite Suppression by a Polymer Coating: A Coarse‐Grained Molecular Study},
author = {Kong, Xian and Rudnicki, Paul E. and Choudhury, Snehashis and Bao, Zhenan and Qin, Jian},
abstractNote = {Abstract A major hurdle to the successful deployment of high‐energy‐density lithium metal based batteries is dendrite growth during battery cycling, which raises safety and cycle life concerns. Coating the Li metal anode with a soft polymer layer has been previously shown to be effective in suppressing dendrite growth, leading to uniform lithium deposition even at high current densities. A 3D coarse‐grained molecular model to study the mechanism of dendrite suppression is presented. It is found that the most effective coatings delay or even prevent dendrites from penetrating the polymer layer during deposition. The optimal deposition can be achieved by jointly tuning the polymer stiffness and relaxation time. Higher polymer dielectric permittivity and coating thickness are also effective, but the deposition rate and, therefore, the charging current density is reduced. These findings provide the basis for rational design of soft polymer coatings for stable lithium deposition.},
doi = {10.1002/adfm.201910138},
journal = {Advanced Functional Materials},
number = 15,
volume = 30,
place = {Germany},
year = {Mon Feb 17 00:00:00 EST 2020},
month = {Mon Feb 17 00:00:00 EST 2020}
}
https://doi.org/10.1002/adfm.201910138
Web of Science
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