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DOE OSTI · 3675872

Effect of Ionomer–Solvent Interactions in PFSA Dispersions: Dispersion Morphology

Novy, Melissa (ORCID:0000000311121011)·Duchesne, Denis·Dahlke, Gregg·Chen, Lisa·Moore, Robert (ORCID:0000000190577695)
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Novy, Melissa (ORCID:0000000311121011), Duchesne, Denis, Dahlke, Gregg, Chen, Lisa, Moore, Robert (ORCID:0000000190577695). 2025-08-06. Effect of Ionomer–Solvent Interactions in PFSA Dispersions: Dispersion Morphology. https://doi.org/10.1021/acs.macromol.5c00613

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DOE OSTI2024

Mechanically and Thermally Robust Gel Electrolytes Built from A Charged Double Helical Polymer

Polymer electrolytes have received tremendous interest in the development of solid-state batteries, but often fall short in one or more key properties required for practical applications. Herein, a rigid gel polymer electrolyte prepared by immobilizing a liquid mixture of a lithium salt and poly(ethylene glycol) dimethyl ether with only 8 wt% poly(2,2′-disulfonyl-4,4′-benzidine terephthalamide) (PBDT) is reported. The high charge density and rigid double helical structure of PBDT lead to formation of a nanofibrillar structure that endows this electrolyte with stronger mechanical properties, wider temperature window, and higher battery rate capability compared to all other poly(ethylene oxide) (PEO)-based electrolytes. The ion transport mechanism in this rigid polymer electrolyte is systematically studied using multiple complementary techniques. Li/LiFePO 4 cells show excellent capacity retention over long-term cycling, with thermal cycling reversibility between ambient temperature and elevated temperatures, demonstrating compelling potential for solid-state batteries targeting fast charging at high temperatures and slower discharging at ambient temperature.

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