ArticleNature communications2026
Overcoming polarization-breakdown trade-off via hydrogen bonding-modulated molecular stacking in high-temperature high-energy-density flexible dielectric.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Flexible dielectrics suffer from an inherent polarization-breakdown trade-off. Herein, we propose a hydrogen bonding-modulated molecular stacking strategy to improve high-temperature capacitive energy storage performance. A series of polyetherimide copolymers with tunable hydrogen bond donors and acceptors was synthesized. Highly polarizable hydroxyl groups boost dielectric constant and increase hydrogen bond donor density. The constructed hydrogen bonding network strengthens intermolecular interactions, thermal stability, and breakdown strength. Bulky trifluoromethyl substituents enlarge interchain spacing and suppress interchain charge transport. Ultimately, the copolymer with optimal molecular stacking delivers a maximum discharged energy density of 7.34 J/cm
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