Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes
Abstract
The plasticization of a polymer electrolyte usually promotes its ionic conductivity but decreases its storage modulus due to the increased polymer chain flexibility. Herein, we show that such a tradeoff between the ionic conductivity and the mechanical robustness of the polymer electrolyte can be alleviated by selective plasticization of the ion-conductive block, such as poly(ethylene oxide) (PEO) in a polystyrene (PS)– PEO–PS block copolymer (SEO) electrolyte using an ether type plasticizer, tetraethylene glycol dimethyl ether (TEGDME). In this work, at maximum plasticizer loading, the room temperature ionic conductivity increases by up to 3 orders, whereas the storage modulus, G' reduces to half, is still on the order of 102 MPa. At above the melting temperature of the PEO block, the dynamic storage modulus, G' of the plasticized membrane surpasses its dry PS-PEO-PS counterpart. Such a phenomenon results from that, a) TEGDME co-crystallizes with PEO to promote its crystallinity and hence the storage modulus, b) TEGDME swells the amorphous PEO phase to enhance the polymer chain segmental mobility and hence ionic conductivity, and c) the PS phase remains intact from TEGDME to keep the SEO elastic.
- Authors:
-
[1];
[1];
[1];
[2];
[1];
[1];
[1];
[2]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1892417
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 169; Journal Issue: 5; Journal ID: ISSN 0013-4651
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Yang, Guang, Cao, Peng-Fei, Self, Ethan C., Lehmann, Michelle, Chen, Xi Chelsea, Zhao, Sheng, Ge, Sirui, Zhu, Chenhui, Saito, Tomonori, Delnick, Frank M., and Nanda, Jagjit. Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes. United States: N. p., 2022.
Web. doi:10.1149/1945-7111/ac6a18.
Yang, Guang, Cao, Peng-Fei, Self, Ethan C., Lehmann, Michelle, Chen, Xi Chelsea, Zhao, Sheng, Ge, Sirui, Zhu, Chenhui, Saito, Tomonori, Delnick, Frank M., & Nanda, Jagjit. Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes. United States. https://doi.org/10.1149/1945-7111/ac6a18
Yang, Guang, Cao, Peng-Fei, Self, Ethan C., Lehmann, Michelle, Chen, Xi Chelsea, Zhao, Sheng, Ge, Sirui, Zhu, Chenhui, Saito, Tomonori, Delnick, Frank M., and Nanda, Jagjit. Wed .
"Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes". United States. https://doi.org/10.1149/1945-7111/ac6a18. https://www.osti.gov/servlets/purl/1892417.
@article{osti_1892417,
title = {Selective Plasticization of Poly (ethylene oxide) (PEO) Block in Nanostructured Polystyrene– PEO– Polystyrene Triblock Copolymer Electrolytes},
author = {Yang, Guang and Cao, Peng-Fei and Self, Ethan C. and Lehmann, Michelle and Chen, Xi Chelsea and Zhao, Sheng and Ge, Sirui and Zhu, Chenhui and Saito, Tomonori and Delnick, Frank M. and Nanda, Jagjit},
abstractNote = {The plasticization of a polymer electrolyte usually promotes its ionic conductivity but decreases its storage modulus due to the increased polymer chain flexibility. Herein, we show that such a tradeoff between the ionic conductivity and the mechanical robustness of the polymer electrolyte can be alleviated by selective plasticization of the ion-conductive block, such as poly(ethylene oxide) (PEO) in a polystyrene (PS)– PEO–PS block copolymer (SEO) electrolyte using an ether type plasticizer, tetraethylene glycol dimethyl ether (TEGDME). In this work, at maximum plasticizer loading, the room temperature ionic conductivity increases by up to 3 orders, whereas the storage modulus, G' reduces to half, is still on the order of 102 MPa. At above the melting temperature of the PEO block, the dynamic storage modulus, G' of the plasticized membrane surpasses its dry PS-PEO-PS counterpart. Such a phenomenon results from that, a) TEGDME co-crystallizes with PEO to promote its crystallinity and hence the storage modulus, b) TEGDME swells the amorphous PEO phase to enhance the polymer chain segmental mobility and hence ionic conductivity, and c) the PS phase remains intact from TEGDME to keep the SEO elastic.},
doi = {10.1149/1945-7111/ac6a18},
journal = {Journal of the Electrochemical Society},
number = 5,
volume = 169,
place = {United States},
year = {Wed May 04 00:00:00 EDT 2022},
month = {Wed May 04 00:00:00 EDT 2022}
}
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