Progress in soft and stretchable electronics depends on energy sources that are mechanically compliant, elastically deformable, and renewable. Energy harvesting using triboelectric nanogenerators (TENGs) made from soft materials provides a promising approach to address this critical need. Here, an elastomeric composite is introduced with sedimented liquid metal (LM) droplets for TENG‐based energy harvesting that relies on assembly of the LM to form phase‐separated conductive and insulating regions. The sedimented LM elastomer TENG (SLM‐TENG) exhibits ultrahigh stretchability (strain limit > 500% strain), skin‐like compliance (modulus < 60 kPa), reliable device stability (>10 000 cycles), and appreciable electrical output performance (max peak power density = 1 mW cm⁻²). SLM‐TENGs can be integrated with highly elastic stretchable fabrics, thereby enabling broad integration with wearable electronics. A stretchable and wearable SLM‐TENG is demonstrated that harvests energy from human motion through a patch attached to the knee or integrated into exercise clothing. This body‐mounted TENG device can generate enough electricity to fully power a wearable computing device (hygro‐thermometer with digital display) after 2.2 min of running on a treadmill.

中文翻译：

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沉积液态金属弹性体复合材料的超拉伸耐磨摩擦纳米发电机

柔软且可拉伸的电子产品的进展取决于机械兼容，可弹性变形和可再生的能源。使用由软质材料制成的摩擦电纳米发电机（TENG）进行能量收集，为解决这一关键需求提供了一种有希望的方法。在这里，引入了一种弹性体复合材料和沉积的液态金属（LM）小滴，用于基于TENG的能量收集，该过程依赖于LM的组装以形成相分离的导电和绝缘区域。沉淀的LM弹性体TENG（SLM-TENG）具有超高的可拉伸性（应变极限> 500％应变），类似皮肤的柔韧性（模量< 60 kPa），可靠的设备稳定性（> 10000次循环）和可观的电输出性能（最大峰值功率密度= 1 mW cm ^-2）。SLM-TENG可以与高弹性可拉伸织物集成在一起，从而实现与可穿戴电子设备的广泛集成。可伸展且可穿戴的SLM-TENG可以通过贴在膝盖上或集成到运动服中的贴片从人体运动中获取能量。在跑步机上运行2.2分钟后，此车载式TENG设备可产生足够的电能，为可穿戴计算设备（带数字显示的温湿度计）完全供电。