ABSTRACT Moisture‐enabled electricity generation technology offers a new paradigm for sustainable energy harvesting, but its practical applications are still limited by issues such as low output power and insufficient long‐term stability. In this paper, an asymmetric sandwich‐structured hydrogel moist–electric generator (SSHMEG) with an ion concentration gradient is designed and constructed. Through dynamic exchange with moisture in ambient humidity, a stable ion diffusion direction is established inside the device, thereby achieving durable and efficient moisture‐enabled electricity generation performance. The SSHMEG achieves an open‐circuit voltage as high as 1.15 V and a short‐circuit current density of 2350 μA cm −2 at 90% relative humidity (RH), along with excellent long‐term stability (maintaining > 1.05 V continuously for 20 days). Featuring high integrability to meet the output requirements of electronic devices, the SSHMEG is highly sensitive to humidity and internal resistance changes (e.g., respiration and stretching), enabling its application as a self‐powered respiration/strain sensor. Combined with deep learning, the strain sensor based on SSHMEG realizes gesture recognition with 100% accuracy. Through the collaborative innovation of the material–structure mechanism, this work paves a new path for the next‐generation high‐performance, multi‐functional, and self‐powered MEG systems.
Chen et al. (Wed,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: