Bendable and breathable polymer nanofibre nonwovens with metal-like electrical conductivity are required for lightweight electrodes and electric shielding design with applications in batteries, functional textiles, sensors, cars, aerospace, constructions, mobile phones, and medical devices. Metal-like conductivity in polymer nonwovens has not been achieved till now due to the limitation of the existing processing techniques. We show here, the metal-like electrical conductivity of 750,000 S/m in polyacrylonitrile (PAN), poly(ε-caprolactone) (PCL) nonwoven using very low content of silver nanowires (AgNW; 3.35 vol%). The key to the high conductivity was the homogenous distribution of AgNW in nonwoven made by wet-laid process using short electrospun fibre and AgNW dispersion. Above a threshold of 0.36 vol% AgNW, the conductivity of the nonwoven increased by seven orders of magnitude, which we attribute to the onset of percolation of the AgNW. Our nonwoven-AgNW composites show fast heating and cooling within a few seconds at a voltage of 1.1 V, which is in the range of portable devices. These composites are also breathable and bendable. The electrical conductivity was independent of the bending angle of the composite, which is important for applications mentioned above and would help other scientists to design new conductive materials in the future.

轻巧的电极和电屏蔽设计需要可弯曲和透气的具有金属导电性的聚合物纳米纤维非织造布，这些非织造布可用于电池，功能性纺织品，传感器，汽车，航空航天，建筑，移动电话和医疗设备。由于现有加工技术的局限性，到目前为止，聚合物非织造布中尚未达到类金属导电性。我们在这里显示了使用极低含量的银纳米线（AgNW; 3.35 vol％）的聚丙烯腈（PAN），聚（ε-己内酯）（PCL）非织造布中的类金属电导率为750,000 S / m。高电导率的关键是采用短电纺纤维和AgNW分散液通过湿法成网工艺制备的非织造布中AgNW的均匀分布。高于0.36 vol％AgNW的阈值，非织造布的电导率增加了七个数量级，这归因于AgNW渗滤的开始。我们的非织造AgNW复合材料在1.1 V的电压下可在几秒钟内快速加热和冷却，这在便携式设备的范围内。这些复合材料还具有透气性和可弯曲性。电导率与复合材料的弯曲角无关，这对上述应用很重要，并且将来将有助于其他科学家设计新的导电材料。