AgNWs/MXene-Guided Nickel Nanosphere Flexible Transparent Conductive Films for Electromagnetic Interference Shielding and Electric Heating

Ubiquitous electromagnetic waves have a negative effect on precision instruments and damage human health. Therefore, multifunctional and versatile flexible transparent conductive films, which can solve the challenge of microelectronic device encapsulated and protected in harsh conditions (e.g., extreme temperature) in specific scenarios, are demanded to process electromagnetic shielding and electric heating properties. Herein, AgNWs/MXene@Ni/PET films were fabricated by MXene template-guided electrochemical deposition of nickel nanosphere as flexible transparent conductive films. The films exhibit excellent optoelectrical properties (9.8 Ω/sq @ transparency 80.3%), splendid EMI shielding performances (35.1 dB), outstanding electric heating performance (85°C at 4 V), and rapid heating capability (reaching the saturation temperature with 40 s), which are potential to be widely applied under the complex surrounding as electromagnetic shielding and electric heating. Noticeably, nickel nanosphere are regarded as resistor-capacitor circuit model on the surface of MXene, forming the structure of the capacitor. Furthermore, magnetic nickel nanospheres have synergistic effect with dielectric MXene and AgNWs, defined Dielectric-Magnetic-Dielectric synergistic absorption. In addition, Ni nanosphere generate dielectric dipole interactions with MXene, to enhance the capability of absorbing EMW. Finally, this work has the potential to be conducive to practical and commercial applications as flexible transparent electromagnetic interference and electric heating devices.