As one of the most promising candidates to mimic the natural skin, electronic skin is capable of reconstructing the tactile sensation for damaged skin or endowing the tactile perception for prosthesis and robotics. However, main challenge in electronic skin lies in maintaining the high sensitivity while enhancing the shape adaptability. Herein, we design a coaxial piezoelectric fiber based electronic skin to imitate the human somatosensory system in a self-powered manner. The electronic skin with highly shape adaptive feature exhibited excellent sensing performance due to the synergistic effect of coaxial structure. The sensitivity can reach up to 10.89±0.5 mV·kPa^-1 in the pressure range of 80-230 kPa. The fabricated electronic skin also showed a superior mechanical durability even after more than 8500 working cycles. Furthermore, the flexible electronic skin was demonstrated to detect and quantify various human motions associated with joints. Additionally, it can be extended to the desired pressure sensing matrix and holds the capability to discriminate different shapes of physical objects, which can be applied in real-time tactile mapping. This work will impact the general approach for tailoring the fiber structured electronic skin for achieving next-generation intelligent robots or artificial prosthesis systems.

作为模拟自然皮肤的最有前途的候选者之一，电子皮肤能够为受损的皮肤重建触觉，或为假肢和机器人技术赋予触觉。然而，电子皮肤的主要挑战在于保持高灵敏度同时增强形状适应性。本文中，我们设计了一种基于同轴压电纤维的电子皮肤，以自供电的方式模仿人体的体感系统。具有高度形状适应性的电子皮肤由于同轴结构的协同作用而表现出优异的感测性能。灵敏度可达10.89±0.5 mV·kPa ^-1在80-230 kPa的压力范围内。即使经过超过8500个工作循环，制成的电子皮肤也显示出优异的机械耐久性。此外，柔性电子皮肤被证明可以检测和量化与关节相关的各种人体运动。此外，它可以扩展到所需的压力感应矩阵，并具有区分不同形状的物理对象的能力，可以将其应用于实时触觉映射。这项工作将影响为实现下一代智能机器人或人工假体系统而定制纤维结构电子皮肤的一般方法。