Highlights

• The iontronic pressure sensor achieved an ultrahigh sensitivity (S_min > 200 kPa⁻¹, S_max > 45,000 kPa⁻¹).

• The iontronic pressure sensor exhibited a broad sensing range of over 1.4 MPa.

• Pseudocapacitive iontronic pressure sensor using MXene was proposed.

ABSTRACT

Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and robotics. Simultaneously, improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge, which hinders the devices’ practical application. Targeting this obstacle, we developed a Ti₃C₂T_x-derived iontronic pressure sensor (TIPS) by taking the advantages of the high intercalation pseudocapacitance under high pressure and rationally designed structural configuration. TIPS achieved an ultrahigh sensitivity (S_min > 200 kPa⁻¹, S_max > 45,000 kPa⁻¹) in a broad sensing range of over 1.4 MPa and low limit of detection of 20 Pa as well as stable long-term working durability for 10,000 cycles. The practical application of TIPS in physical activity monitoring and flexible robot manifested its versatile potential. This study provides a demonstration for exploring pseudocapacitive materials for building flexible iontronic sensors with ultrahigh sensitivity and sensing range to advance the development of high-performance wearable electronics.

 亮点

• 
  离子电子压力传感器实现了超高灵敏度（ S _min > 200 kPa ^-1 ， S _max > 45,000 kPa ^-1 ）。

• 
  离子电子压力传感器具有超过 1.4 MPa 的宽传感范围。

• 
  提出了使用 MXene 的赝电容离子电子压力传感器。

 抽象的

柔性压力传感器在监测人类身体活动和机器人技术方面得到了前所未有的研究。同时，提高柔性压力传感器的响应灵敏度和传感范围是一个巨大的挑战，阻碍了该器件的实际应用。针对这一障碍，我们利用高压下高嵌入赝电容的优势和合理设计的结构配置，开发了Ti ₃ C ₂ T _x衍生的离子电子压力传感器（TIPS）。 TIPS在超过1.4 MPa的宽传感范围和20 Pa的低检测限中实现了超高灵敏度（ S _min > 200 kPa ^-1 、 S _max > 45,000 kPa ^-1 ）以及稳定的长期工作耐久性10,000 次循环。 TIPS在体力活动监测和柔性机器人方面的实际应用显示了其多功能潜力。这项研究为探索赝电容材料构建具有超高灵敏度和传感范围的柔性离子电子传感器提供了示范，以推动高性能可穿戴电子产品的发展。