ArticleNature communications2026
Hyperbranched dielectric polymer networks exhibiting giant energy storage density at 250 °C.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Not yet cited in PubMed.
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Corrections and comments
- Erratum issued
Authors and funding
8 authors.
Funding
Abstract
Harsh-environment requirements of electrical and electronic systems demand advanced dielectrics with high energy storage density at elevated temperatures. Heat-resistant polymers are usually designed with densely packed molecular chains to maintain structural integrity. Unfortunately, the narrowed inter-chain spacing causes severe charge transfer under high electro-thermal fields, prohibiting capacitive energy storage beyond 200 °C. Here we report hyperbranched dielectric polymer networks as a solution to the persistent challenge. The hyperbranched topological junctions not only transform the linear polymer chains into a robust network to tolerate thermal stress, but also expand the inter-chain spacing to inhibit charge transfer. Results suggest that the hyperbranched networks exhibit suppressed secondary chain relaxation alongside expanded free volume. Moreover, the customizable chemical structure of hyperbranched centers renders this method general to capacitive polymer design. The hyperbranched polymer networks exhibit an exceptionally high discharged energy density of 4.9 J/cm
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