The demand for lightweight, thin electromagnetic interference (EMI) shielding film materials with high shielding effectiveness (SE), excellent mechanical properties, and stability in complex environments is particularly pronounced in the realm of flexible and portable electronic products. Here, we developed an ultra-thin film (CNT@GC) in which the glassy carbon (GC) layer wrapped around and welded carbon nanotubes (CNTs) to form a core-shell network structure, leading to exceptional tensile strength (327.2 MPa) and electrical conductivity (2.87 × 10⁵ S·m⁻¹). The CNT@GC film achieved EMI SE of 60 dB at a thickness of 2 µm after post-acid treatment and high specific SE of 3.49 × 10⁵ dB·cm²·g⁻¹, with comprehensive properties surpassing those of the majority of previous shielding materials. Additionally, the CNT@GC film exhibited Joule heating capability, reaching a surface temperature of 135 °C at 3 V with a fast thermal response of about 0.5 s, enabling anti-icing/de-icing functionality. This work presented a methodology for constructing a robust CNT@GC film with high EMI shielding performance and exceptional Joule heating capability, demonstrating immense potential in wearable devices, defense, and aerospace applications.

在柔性和便携式电子产品领域，对轻质、薄型、高屏蔽效能（SE）、优异的机械性能以及复杂环境下稳定性的电磁干扰（EMI）屏蔽膜材料的需求尤为明显。在这里，我们开发了一种超薄膜（CNT@GC），其中玻璃碳（GC）层包裹并焊接碳纳米管（CNT）以形成核壳网络结构，从而具有出色的拉伸强度（327.2 MPa）和电导率(2.87×10 ⁵ S·m ^-1 )。 CNT@GC薄膜经酸后处理后在2 µm厚度下实现了60 dB的EMI SE和3.49 × 10 5 ^dB ·cm ² ·g ⁻¹的高比SE ，综合性能超过了大多数以往的薄膜。屏蔽材料。此外，CNT@GC薄膜表现出焦耳加热能力，在3V电压下表面温度达到135℃，并具有约0.5s的快速热响应，实现了防冰/除冰功能。这项工作提出了一种构建坚固的 CNT@GC 薄膜的方法，该薄膜具有高 EMI 屏蔽性能和卓越的焦耳加热能力，展示了在可穿戴设备、国防和航空航天应用中的巨大潜力。