Dual‐Dynamic Modulation of Thermal Radiation and Electromagnetic Interference Shielding with the Self‐Healing Electrochromic Device

Abstract

There is a need to develop next generation devices for dual‐dynamic regulation of thermal radiation and electromagnetic interference (EMI) shielding to allow the precise operation of electronic components. Here, a novel, stretchable, and self‐healing electrochromic device with unprecedented dynamic tunability of thermal emittance and electromagnetic interference is developed, which exhibits the thermal emittance modulation (Δε) of 0.37 and 0.43 at 8–14 µm under different voltages and strains, respectively. Additionally, by tuning the strain, the device can achieve the change of EMI shielding efficiency (SE) of 16.1 dB due to the increase of the transmittance for electromagnetic wave between the interleaving of the fibers. Moreover, the device exhibits outstanding mechanical stability (98.7% retention of Δε at 8–14 µm and 97.7% retention of EMI SE after bending for 300 cycles), a remarkable stretching stability (99.2% retention of Δε at 8–14 µm and 98.2% retention of EMI SE after stretching for 50 cycles) and the self‐healing performance (99.8% retention of Δε at 8–14 µm and 99.6% retention of EMI SE after the self‐healing). These results indicate that the device have excellent tunability for EMI shielding and thermal management in communication, military, and smart electronics.

Transparent, Stretchable, and Self‐Healable Gas Barrier Films with 2D Nanoplatelets for Flexible Electronic Device Packaging Applications

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All-Solid-State Infrared Electrochromic Devices Based on Thin Metal Films

“…Infrared electrochromic devices (IR-ECDs) are attractive for applications in the fields of smart thermal management, − adaptive thermal camouflage, ,, and dynamic information display, , owing to their fast response with precise emissivity regulating capability. , In IR-ECDs, the electrolyte layers function as the source of ions and a physical layer that separates the electrodes for avoiding device short circuits, most of which are polymer gel or liquid electrolytes. , However, potential problems such as electrolyte leakage, volatility, and bubble formation limit its practical application. , …”

VIS-IR electrochromic device with electromagnetic wave absorption function based on a Fe3O4@PANI composite material

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