Pressure sensing is key to smart wearable electronics and human–machine interaction interfaces. To achieve a high‐performance pressure sensor that has broad linear range and is capable of detecting subtle changes of pressure, the good choice of sensing materials and rational design of structures are both needed. A novel piezoresistive sensor based on hollow MXene spheres/reduced graphene composite aerogel and flexible interdigital electrodes is presented. Benefiting from the unique microstructure of the composite aerogel, the prepared pressure sensor exhibits high sensitivity (609 kPa⁻¹ in the range of 6.4–10 kPa), broad linear range (0–10 kPa), low detection limit (6 Pa), short response time (232 ms), and good durability (6000 cycles). Moreover, the device is able to monitor various human activities in real time, as well as distinguish tiny differences of grain. The potential application of mapping the location and intensity of the pressures is also explored.

中文翻译：

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中空的MXene球/还原石墨烯气凝胶复合材料，用于超高灵敏度的压阻传感器

压力感应是智能可穿戴电子设备和人机交互界面的关键。为了实现具有宽线性范围并且能够检测压力细微变化的高性能压力传感器，既需要良好的传感材料选择，又需要合理的结构设计。提出了一种基于中空MXene球体/还原石墨烯复合气凝胶和柔性叉指电极的新型压阻传感器。得益于复合气凝胶的独特微观结构，所制备的压力传感器显示出高灵敏度（609 kPa ^-1在6.4–10 kPa的范围内，宽的线性范围（0–10 kPa），低的检测极限（6 Pa），短的响应时间（232 ms），以及良好的耐久性（6000个循环）。此外，该设备能够实时监控各种人类活动，并区分出细微的谷物差异。还探讨了绘制压力的位置和强度的潜在应用。