Among the increasingly popular miniature and flexible smart electronics, two-dimensional materials show great potential in the development of flexible electronics owing to their layered structures and outstanding electrical properties. MXenes have attracted much attention in flexible electronics owing to their excellent hydrophilicity and metallic conductivity. However, their limited interlayer spacing and tendency for self-stacking lead to limited changes in electron channels under external pressure, making it difficult to exploit their excellent surface metal conductivity. We propose a strategy for rapid gas foaming to construct interlayer tunable MXene aerogels. MXene aerogels with rich interlayer network structures generate maximized electron channels under pressure, facilitating the effective utilization of the surface metal properties of MXene; this forms a self-healable flexible pressure sensor with excellent sensing properties such as high sensitivity (1,799.5 kPa^–1), fast response time (11 ms), and good cycling stability (>25,000 cycles). This pressure sensor has applications in human body detection, human–computer interaction, self-healing, remote monitoring, and pressure distribution identification. The maximized electron channel design provides a simple, efficient, and scalable method to effectively exploit the excellent surface metal conduction of 2D materials.

中文翻译：

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MXene 气凝胶使电子通道最大化，用于高性能自修复柔性电子皮肤

在日益流行的微型和柔性智能电子产品中，二维材料以其层状结构和优异的电学性能在柔性电子产品的发展中显示出巨大的潜力。由于其优异的亲水性和金属导电性，MXenes 在柔性电子产品中备受关注。然而，它们有限的层间距和自堆叠倾向导致电子通道在外部压力下的变化有限，难以发挥其优异的表面金属导电性。我们提出了一种快速气体发泡策略来构建层间可调 MXene 气凝胶。具有丰富层间网络结构的 MXene 气凝胶在压力下产生最大化的电子通道，促进有效利用MXene的表面金属特性；这形成了一种可自我修复的柔性压力传感器，具有出色的传感特性，例如高灵敏度（1,799.5 kPa^–1 )、快速响应时间 (11 ms) 和良好的循环稳定性（>25,000 次循环）。该压力传感器在人体检测、人机交互、自我修复、远程监控、压力分布识别等方面都有应用。最大化的电子通道设计提供了一种简单、高效且可扩展的方法来有效地利用二维材料优异的表面金属导电性。