Synergistic Interface Engineering and Band Alignment Enable High-Temperature Capacitive Performance in PAEK-Based Polymer Nanocomposites
Why this work is in the frame
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Bibliographic record
Abstract
Polymer dielectric capacitors are crucial devices of high-power electrical systems for capacitive energy storage. The large conduction loss of polymer dielectrics at elevated temperatures and electric fields is the main challenge. Herein, dielectric nanocomposites of BNNS/poly(aryl ether ketone) (PAEK) regulated by interfacial engineering and band alignment are presented, significantly restraining the conduction loss and greatly enhancing the energy storage density at high temperatures and high electric fields. Dual-functionalized BNNS with −NH 2 and −F groups (F–BNNS–NH 2 ) were prepared and incorporated into carboxylate-functionalized PAEK (PAEK–COOH) to form robust interfacial bonding via an amino-carboxyl reaction, enabling excellent thermal stability and mechanical properties of the composites. Meanwhile, the electron-withdrawing nature of the −F group regulated the BNNS band structure to achieve widened E g, which is responsible for the generation of electrons and holes trappings. At optimal conditions, a record-high breakdown strength of 600 MV/m with an energy density of 5.58 J/cm 3 and an energy density of 5.01 J/cm 3 at an efficiency of 90% is realized at 150 °C, which surpasses most reported nanocomposite dielectrics. This work establishes a paradigm for harmonizing interfacial reinforcement with electronic structure regulation in extreme-condition energy storage dielectrics.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it