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Electrostatic-electromagnetic coupling regulates wireless energy interaction for interference shielding
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DOI：10.1016/j.matt.2026.103000.png)
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Abstract
En 中文
More adaptive electromagnetic compatibility of electronic devices is increasingly required. However, the engineering environment of multimodal integration increases the complexity of the interaction between external energy and wireless signals. We report a wireless energy interaction system regulated by electrostatic-electromagnetic coupling for enhanced electromagnetic interference (EMI) shielding. Triboelectric nanogenerators (TENGs) with tribopositive polypyrrole and tribonegative polydimethylsiloxane generate tunable built-in electric field, allowing the coupling between TENG-induced electrostatic field and incident electromagnetic wave. Theoretical calculations and characteristic TENG performance parameters demonstrate that this coupling prompts electrostatically confined interfacial charges to assemble into highly polarizable electron clouds at the triboelectric interfaces. Ultimately, the TENG with optimal electrostatic output (3.46 V and 150.5 nA) achieved an EMI shielding effectiveness of 41.45 dB in the X band, with only 0.32 μm of polypyrrole deposition. Our TENG-enabled EMI shielding systems offer a powerful platform for interactive electronics where multiple dynamic physics fields can be compatibly integrated.
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