Free-standing MXene films are recognized as excellent electromagnetic interference (EMI) shielding walls owing to their high conductivity, laminate structures, and abundant terminations. Here, we report conjugated polymers of PBTz-SO₃Na, PBTz-SO₃TBA, and PEDOT:PSS, respectively, electrostatically assembled on interlayer surfaces of Ti₃C₂T_x MXene generating tunable electric dipoles, accompanied by improvements of conductivity, oxidation resistance, and mechanical stability, to ultimately enhance EMI shielding performance. PEDOT²⁺ (or TBA⁺) cations on Ti₃C₂T_x surfaces induce reversely strong polarized dipoles and enhance conductivity for more electromagnetic wave (EW) attenuation. By increasing the anchored polymers, the enhanced absorption attenuation ensures complete attenuation of incident EW, revealing a dual mechanism of reflection and absorption for EW shielding. At last, the Ti₃C₂T_x anchored with PEDOT²⁺ (or TBA⁺) achieves EMI shielding effectiveness approaching 100 dB at 20-μm thickness. Briefly, multifunctional engineering in electric dipoles between MXene interlayers opens an unexplored avenue for designing efficient EMI shielding materials.

独立式 MXene 薄膜因其高导电性、层压结构和丰富的端子而被认为是优异的电磁干扰 (EMI) 屏蔽墙。在这里，我们分别报道了 PBTz-SO ₃ Na、PBTz-SO ₃ TBA 和 PEDOT:PSS 的共轭聚合物，它们静电组装在 Ti ₃ C ₂ T _x MXene 的层间表面上，产生可调节的电偶极子，同时提高了电导率，抗氧化性和机械稳定性，最终增强 EMI 屏蔽性能。Ti ₃ C ₂ T _x表面上的PEDOT ²⁺（或TBA ⁺ ）阳离子诱导反向强极化偶极子并增强电导率，以实现更多电磁波（EW）衰减。通过增加锚定聚合物，增强的吸收衰减确保了入射电子波的完全衰减，揭示了电子波屏蔽的反射和吸收的双重机制。最后，锚定有PEDOT ²⁺（或TBA ^{+ ）的Ti} ₃ C ₂ T _x在20μm厚度下实现了接近100dB的EMI屏蔽效能。简而言之，MXene 夹层之间电偶极子的多功能工程为设计高效 EMI 屏蔽材料开辟了一条尚未探索的途径。