Reversible Changes in the Grain Structure and Conductivity in a Block Copolymer Electrolyte
Abstract
Here, we study the phase behavior of a triblock organic–inorganic hybrid copolymer, poly(polyhedral oligomeric silsesquioxane)-b-poly(ethylene oxide)-b-poly(polyhedral oligomeric silsesquioxane) (POSS-PEO-POSS)/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt mixture, as a function of temperature. The polymer exhibits a lamellar morphology both in the neat state and in the presence of salt. However, the average grain size increases substantially when the electrolyte is heated above 113 °C. The grain structure of this sample changes reversibly with temperature, that is, smaller grains reappear when the electrolyte is cooled below 113 °C. While annealing block copolymers at high temperatures often leads to an increase in the grain size, this change is generally irreversible. The reason for the reversible change in the grain structure of the POSS-PEO-POSS/LiTFSI electrolyte is discussed. The ionic conductivity of the electrolyte also exhibits reversible changes in this temperature window. Knowledge of the grain structure is crucial for understanding ion transport in nanostructured electrolytes.
- Authors:
-
[1];
[2];
[4];
[6];
[7]
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage & Distributed Resources Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Energy Storage Research (JCESR); Univ. of California, Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage & Distributed Resources Division and Joint Center for Energy Storage Research (JCESR); Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- 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). Scientific User Facilities Division
- OSTI Identifier:
- 1775397
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Macromolecules
- Additional Journal Information:
- Journal Volume: 53; Journal Issue: 13; Journal ID: ISSN 0024-9297
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; grain; x-ray scattering; scattering; electrical conductivity; electrolytes
Citation Formats
Chakraborty, Saheli, Jiang, Xi, Hoffman, Zach J., Sethi, Gurmukh K., Zhu, Chenhui, Balsara, Nitash P., and Villaluenga, Irune. Reversible Changes in the Grain Structure and Conductivity in a Block Copolymer Electrolyte. United States: N. p., 2020.
Web. doi:10.1021/acs.macromol.0c00466.
Chakraborty, Saheli, Jiang, Xi, Hoffman, Zach J., Sethi, Gurmukh K., Zhu, Chenhui, Balsara, Nitash P., & Villaluenga, Irune. Reversible Changes in the Grain Structure and Conductivity in a Block Copolymer Electrolyte. United States. https://doi.org/10.1021/acs.macromol.0c00466
Chakraborty, Saheli, Jiang, Xi, Hoffman, Zach J., Sethi, Gurmukh K., Zhu, Chenhui, Balsara, Nitash P., and Villaluenga, Irune. Thu .
"Reversible Changes in the Grain Structure and Conductivity in a Block Copolymer Electrolyte". United States. https://doi.org/10.1021/acs.macromol.0c00466. https://www.osti.gov/servlets/purl/1775397.
@article{osti_1775397,
title = {Reversible Changes in the Grain Structure and Conductivity in a Block Copolymer Electrolyte},
author = {Chakraborty, Saheli and Jiang, Xi and Hoffman, Zach J. and Sethi, Gurmukh K. and Zhu, Chenhui and Balsara, Nitash P. and Villaluenga, Irune},
abstractNote = {Here, we study the phase behavior of a triblock organic–inorganic hybrid copolymer, poly(polyhedral oligomeric silsesquioxane)-b-poly(ethylene oxide)-b-poly(polyhedral oligomeric silsesquioxane) (POSS-PEO-POSS)/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt mixture, as a function of temperature. The polymer exhibits a lamellar morphology both in the neat state and in the presence of salt. However, the average grain size increases substantially when the electrolyte is heated above 113 °C. The grain structure of this sample changes reversibly with temperature, that is, smaller grains reappear when the electrolyte is cooled below 113 °C. While annealing block copolymers at high temperatures often leads to an increase in the grain size, this change is generally irreversible. The reason for the reversible change in the grain structure of the POSS-PEO-POSS/LiTFSI electrolyte is discussed. The ionic conductivity of the electrolyte also exhibits reversible changes in this temperature window. Knowledge of the grain structure is crucial for understanding ion transport in nanostructured electrolytes.},
doi = {10.1021/acs.macromol.0c00466},
journal = {Macromolecules},
number = 13,
volume = 53,
place = {United States},
year = {Thu Jul 02 00:00:00 EDT 2020},
month = {Thu Jul 02 00:00:00 EDT 2020}
}
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