Abstract Skin-conformability and lead-free piezo-materials are important for piezoelectric nanogenerator (PENG)-based wearable electronics. Here, a skin-conformal BaTiO3/Ecoflex-based PENG was fabricated by incorporating BaTiO3 particles into an Ecoflex matrix. Due to the inherent elongation of Ecoflex, appropriate thickness of the BTO&Ecoflex film, and optimized polarization, the fabricated device exhibited suitable skin-conformability and high output performance. The output voltage/current reached 8.9 V/49.7 nA with a load resistance of 200 MΩ (effective area: 1.0 cm × 1.0 cm). Due to its suitable skin-conformability and high output performance, the device can be attached to an elbow as an active sensor for the monitoring of joints. In this way, it is promising for medical research and human-machine interaction (HMI) applications. This study is significant for the development of skin-conformal lead-free PENGs.

中文翻译：

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用于自供电人体运动监测的基于皮肤共形 BaTiO3/Ecoflex 的压电纳米发电机

摘要 皮肤贴合性和无铅压电材料对于基于压电纳米发电机 (PENG) 的可穿戴电子产品非常重要。在这里，通过将 BaTiO3 颗粒掺入 Ecoflex 基质中，制造了一种皮肤保形 BaTiO3/Ecoflex 基 PENG。由于 Ecoflex 固有的伸长率、适当的 BTO&Ecoflex 薄膜厚度和优化的极化，制造的设备表现出合适的皮肤贴合性和高输出性能。输出电压/电流达到 8.9 V/49.7 nA，负载电阻为 200 MΩ（有效面积：1.0 cm × 1.0 cm）。由于其合适的皮肤贴合性和高输出性能，该设备可以连接到肘部作为监测关节的主动传感器。这样，它在医学研究和人机交互 (HMI) 应用中大有可为。