Issue 28, 2023

Do non-coordinating polymers function as host materials for solid polymer electrolytes? The case of PVdF-HFP

Abstract

In the search for novel solid polymer electrolytes (SPEs), primarily targeting battery applications, a range of different polymers is currently being explored. In this context, the non-coordinating poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) polymer is a frequently utilized system. Considering that PVdF-HFP should be a poor solvent for cation salts, it is counterintuitive that this is a functional host material for SPEs. Here, we do an in-depth study of the salt dissolution properties and ionic conductivity of PVdF-HFP-based electrolytes, using two different fabrication methods and also employing a low-molecular-weight solvent analogue. It is seen that PVdF-HFP is remarkably poor as an SPE host, despite its comparatively high dielectric constant, and that the salt dissolution properties instead are controlled by fluorophilic interactions of the anion with the polymer.

Graphical abstract: Do non-coordinating polymers function as host materials for solid polymer electrolytes? The case of PVdF-HFP

Article information

Article type
Paper
Submitted
28 3月 2023
Accepted
26 6月 2023
First published
26 6月 2023
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2023,11, 15329-15335

Do non-coordinating polymers function as host materials for solid polymer electrolytes? The case of PVdF-HFP

G. Hernández, T. K. Lee, M. Erdélyi, D. Brandell and J. Mindemark, J. Mater. Chem. A, 2023, 11, 15329 DOI: 10.1039/D3TA01853A

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