MXenes have received extensive attention in the fields of energy storage and flexible electronics due to their excellent physicochemical properties. However, MXenes are prone to self-stacking, which would result in severely degraded performance of the electronic devices. Unlike the optimization of the structure-property relationship of MXene at specific scale in most reported studies, the current work is based on the multiscale design concept: MXene aerogels with abundant ion/electron channels are constructed through an efficient chemical oxidation and rapid gas foaming strategy. Nanoscale in-plane nanoporous MXenes can lead to increased ion channels and effectively shortened ion transport distances. Micron-scale MXene aerogels can provide abundant ionic active sites and maximized electron channels. The fabricated integrated self-healable flexible zinc-ion energy storage and pressure sensing system offers high areal specific capacitance of 576 mF cm⁻², sufficient energy density of 156.8 uWh cm⁻² at a power density of 4200 uW cm⁻², and ultra-high pressure sensitivity (1024.9 kPa⁻¹), which has great potential in applications including self-healing and flexible wearable devices. The multiscale design concept achieves the maximization of ion/electron channels, realizing a thoughtful strategy for the optimization of flexible electronic devices.

MXenes以其优异的物理化学性能在储能和柔性电子领域受到广泛关注。然而，MXenes 容易自堆叠，这会导致电子设备的性能严重下降。与大多数报道的研究中特定尺度下 MXene 的结构-性质关系的优化不同，目前的工作基于多尺度设计理念：通过高效的化学氧化和快速气体发泡策略构建具有丰富离子/电子通道的 MXene 气凝胶. 纳米级平面内纳米多孔 MXenes 可以增加离子通道并有效缩短离子传输距离。微米级 MXene 气凝胶可以提供丰富的离子活性位点和最大化的电子通道。⁻² ，在4200 uW cm ⁻²的功率密度下具有156.8 uWh cm ⁻²的足够能量密度，以及超高的压力敏感性（1024.9 kPa ⁻¹），在包括自愈和柔性可穿戴设备在内的应用中具有巨大的潜力. 多尺度设计理念实现了离子/电子通道的最大化，实现了柔性电子器件优化的周到策略。