• • ATMEG achieves 0.2 V and 0.51 μA cm−2 at ~90% RH, representing 400% and 287% improvements over unaligned counterparts, directly addressing the low-output bottleneck in moisture-enabled generators for practical wearable power.
• • Ultrafast response and recovery times of 0.16 s and 0.08 s, respectively, enable real-time motion tracking, surpassing conventional MEGs that lag by seconds, critical for dynamic human-machine interfaces.
• • The aligned ion channels reduce tortuosity, enhancing ion flux and transport efficiency, which is evidenced by the significant performance gains, offering a design principle for high-efficiency energy harvesting.
• • The device's anisotropic characteristics allow multidirectional strain sensing, distinguishing both amplitude and direction of human motion, a feature absent in most stretchable MEGs, expanding applications in adaptive prosthetics and robotics.