Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 10549-10556 |
| Number of pages | 8 |
| Journal | Macromolecules |
| Volume | 57 |
| Issue number | 22 |
| DOIs | |
| State | Published - Nov 26 2024 |
Funding
This work was primarily supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, of the U.S. Department of Energy, under Contract DE-AC02-05CH11231 under the Battery Materials Research Program. This research used resources at the High Flux Isotope, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory (IPTS 29567.1). Work at the Molecular Foundry, which is a DOE Office of Science User Facility, was supported by Contract No. DE-AC02-05CH11231.