Excellent mechanical flexibility, thermal conductivity, and microwave absorption are essential properties for multifunctional materials applied in next‐generation wearable electronics. However, it remains a great challenge to improve the incompatibility among these properties. Herein, high‐quantity V2O5@NaV6O15@PPy core‐shell nanofibers (CSNFs) are synthesized via a simple dissolution‐recrystallization and in situ redox polymerization process. Owing to regular, periodic, and stable sensing signals, their membrane can serve as a strain sensor to accurately detect word pronunciation and body movement. Their TPU films possess high strength, excellent hydrophobicity, and large thermal conductivity (3.56 W m−1 K−1); 7 wt.% load. Besides, the CSNFs exhibit efficient wide‐band microwave absorption (8.56 GHz) and RCS reduction (24.41 dBm2) at a low load (7 wt.%), outperforming most other absorbers. The boosted performance can be ascribed to their 1D structure with multiple heterostructures and abundant defects, which generate conductive loss, diverse polarizations, multiple microwave scattering, and the cooperative heat transfer of electrons and phonons. Further analyses reveal their heat transfer and dielectric loss mechanisms based on the density of states, electric field distribution, and the phonon density of states. Overall, the V2O5@NaV6O15@PPy CSNFs are promising as multifunctional materials for applications in wearable strain sensing, thermal management, EM protection, and Radar stealth, particularly in extreme environments.

中文翻译：

---

用 PPy V2O5@NaV6O15纳米纤维涂层，以实现突出的灵敏度、散热、电磁保护、防水和机械性能


出色的机械柔韧性、导热性和微波吸收是应用于下一代可穿戴电子产品的多功能材料的基本特性。然而，改善这些性质之间的不相容性仍然是一个巨大的挑战。在此，通过简单的溶解-再结晶和原位氧化还原聚合工艺合成了大量V2O5@NaV6O15@PPy核壳纳米纤维 （CSNF）。由于具有规律、周期和稳定的传感信号，它们的膜可以用作应变传感器，准确检测单词发音和身体运动。他们的 TPU 薄膜具有高强度、优异的疏水性和较大的导热性 （3.56 W m-1 K-1）;7 wt.% 负载。此外，CSNF 在低负载 （7 wt.%） 下表现出高效的宽带微波吸收 （8.56 GHz） 和 RCS 降低 （24.41 dBm2），性能优于大多数其他吸收材料。性能的提升可以归因于它们的 1D 结构，具有多个异质结构和丰富的缺陷，这些缺陷会产生导电损耗、多样化的极化、多个微波散射以及电子和声子的协同热传递。进一步的分析揭示了它们基于状态密度、电场分布和声子状态密度的传热和介电损耗机制。总体而言，V2O5@NaV6O15@PPy CSNF 有望成为可穿戴应变传感、热管理、电磁保护和雷达隐身应用的多功能材料，尤其是在极端环境中。