The traditional 3D porous structures often sacrifice density for high porosity, which is not conducive for energy storage under a limited space. So, it is a challenge to seek the strategy to well balance of the density and porosity in foam materials. In this work, we fabricated MXene based foam by the hydrazine vapor-induced reduction, which can achieve the precise regulation on the density (100–360 mg cm⁻³) and pore size (5.08–61.04 μm) while maintaining its high porosity over 77.9%. And it is carried out by simply tuning the oxygenated functional group concentration of the original MXene/GO films. Then the interlayer-spacing-regulated 3D MXene/rGO foams was used to construct the multifunctional Zinc ion microcapacitor (ZIMC) by the laser engraving processes, which is simple and suitable for large-scale process production. The final ZIMC exhibited a low self-discharge rate of 2.75 mV h⁻¹, a large area-specific capacitance of 83.96 mF cm⁻², and maintained an initial capacitance of 86.3% after five self-healing processes. In addition, the ZIMC-powered integrated pressure sensing system enables real-time monitoring of human physiological signals. Combining these prominent performance with the simple device-assembly method makes this microcapacitor highly potential in the next-generation electronics.

传统的3D多孔结构往往会为了高孔隙率而牺牲密度，这不利于有限空间下的储能。因此，寻求平衡泡沫材料密度和孔隙率的策略是一项挑战。在这项工作中，我们通过肼蒸气诱导还原制备了基于 MXene 的泡沫，可以实现对密度的精确调节（100-360 mg cm ^-3) 和孔径 (5.08–61.04 μm)，同时保持其超过 77.9% 的高孔隙率。它是通过简单地调整原始 MXene/GO 薄膜的氧化官能团浓度来实现的。然后使用层间距调节的3D MXene/rGO泡沫通过激光雕刻工艺构建多功能锌离子微电容器（ZIMC），该方法简单且适合大规模工艺生产。^{最终的 ZIMC 表现出 2.75 mV h -1}的低自放电率，83.96 mF cm ^-2的大面积比电容，并在五次自愈过程后保持了 86.3% 的初始电容。此外，由 ZIMC 驱动的集成压力传感系统能够实时监测人体生理信号。将这些突出的性能与简单的器件组装方法相结合，使这种微电容器在下一代电子产品中具有很高的潜力。