Completely Miscible Polymer Blend Electrolyte Studied by Small-Angle Neutron Scattering
We studied blend electrolytes comprising poly(ethylene oxide) (PEO), poly(pentyl malonate) (PPM), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Ion transport in the blend electrolytes resembles transport in PEO/LiTFSI and PPM/LiTFSI systems. The thermodynamic properties of the PEO/PPM/LiTFSI blend electrolytes were studied by small-angle neutron scattering (SANS). The effect of added salt on polymer blend thermodynamics is quantified by an effective Flory–Huggins interaction parameter, χeff. The blend electrolytes exhibit one-phase, and χeff is negative at all salt concentrations. This is noteworthy because the addition of salt generally leads to macrophase-separation in polymer blends.
Authors
- Young Se Kwon (ORCID: https://orcid.org/0000-0003-4570-7037)
- Nitash P. Balsara (ORCID: https://orcid.org/0000-0002-0106-5565)
- Vivaan Patel (ORCID: https://orcid.org/0000-0002-7591-7353)
- Jaeyong Lee (ORCID: https://orcid.org/0000-0001-9850-6525)
- C. A. Pratt
- Emily E. Abdo (ORCID: https://orcid.org/0000-0002-7811-7837)
- Lilin He (ORCID: https://orcid.org/0000-0002-9560-8101)
- Juin Yau Lim (ORCID: https://orcid.org/0000-0002-2691-4439)
Institutions
- Oak Ridge National Laboratory (US)
- Lawrence Berkeley National Laboratory (US)
- University of California, Berkeley (US)
Publication Details
- Journal
- Macromolecules
- Published
- 2024-11-13
- DOI
- https://doi.org/10.1021/acs.macromol.4c01714
- Citations
- 5
- Primary Topic
- Advanced Battery Materials and Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- Oak Ridge Institute for Science and Education
- Vehicle Technologies Program
- Lawrence Berkeley National Laboratory