Flexible pressure sensors are one of the most important components in the fields of electronic skin (e-skin), robotics, and health monitoring. However, the application of pressure sensors in practice is still difficult and expensive due to the limited sensing properties and complex manufacturing process. The emergence of MXene, a red-hot member of the 2D nanomaterials, has brought a brand-new breakthrough for pressure sensing. Ti₃C₂T_x is the most popular studied MXene in the field of pressure sensing and shows good mechanical, electrical properties, excellent hydrophilicity, and extensive modifiability. It will ameliorate the properties of the sensitive layer and electrode layer of the pressure sensor, and further apply pressure sensing to many fields, such as e-skin flexibility. Herein, the preparation technologies, antioxidant methods, and properties of MXene are summarized. The design of MXene-based microstructures is introduced, including hydrogels, aerogels, foam, fabrics, and composite nanofibers. The mechanisms of MXene pressure sensors are further broached, including piezoresistive, capacitive, piezoelectric, triboelectric, and potentiometric transduction mechanism. Moreover, the integration of multiple devices is reviewed. Finally, the chance and challenge of pressure sensors improved by MXene smart materials in future e-skin and the Internet of Things are prospected.

中文翻译：

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MXene在压力传感中的作用：制备、复合结构设计和机理

柔性压力传感器是电子皮肤（e-skin）、机器人和健康监测领域最重要的组件之一。然而，由于传感性能有限和制造工艺复杂，压力传感器在实践中的应用仍然困难重重且成本高昂。二维纳米材料中炙手可热的一员MXene的出现，为压力传感带来了全新的突破。Ti ₃ C ₂ T _x是压力传感领域中研究最多的 MXene，具有良好的机械、电气性能、出色的亲水性和广泛的可修改性。它将改善压力传感器的敏感层和电极层的性能，进一步将压力传感应用到许多领域，例如电子皮肤的灵活性。本文总结了MXene的制备技术、抗氧化方法和性能。介绍了基于 MXene 的微结构设计，包括水凝胶、气凝胶、泡沫、织物和复合纳米纤维。进一步探讨了 MXene 压力传感器的机制，包括压阻、电容、压电、摩擦电和电位转换机制。此外，审查了多个设备的集成。最后，