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Demonstrates energy harvesting in varying humidity and temperature, suggesting a novel sustainable approach.
Moisture‐Electric Generators (MEGs) are capable of harnessing environmental humidity gradients to drive ion migration and continuously generate electricity, garnering significant attention due to their green and sustainable attributes. The sustained maintenance of moisture gradients and ion transport efficiency are important to their key performance. Inspired by the multi‐level porous structure of lotus roots, this research designs and fabricates a self‐sustaining MEG with a bilayer heterostructure (GPSC MEG). This device not only achieves directional water delivery and controllable evaporation, but also has abundant negative functional groups inside, which can drive the selective separation of positive charges and form concentration gradients, thereby achieving continuous and stable power generation for over 1200 h in a wide environmental range of 10%–95% relative humidity (RH) and −20°C to 80°C. When under conditions of 25°C and 60% RH, its open‐circuit voltage reaches 1.12 V, peak short‐circuit current density attains 671.5 µA cm −2 , and stable output power density stands at 22.12 µW cm −2 , surpassing most previous reported MEGs. Furthermore, the output voltage change rate linearly with external pressure, highlighting its potential for self‐powered motion sensing. This biomimetic directional channel design provides a simple and scalable strategy for high‐performance sustainable energy harvesting.
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Yang et al. (2026) studied this question.
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