Abstract: The moist-electric generators (MEG) and triboelectric nanogenerators (TENG) represent two emerging energy harvesting technologies that could support sustainable energy solutions, especially promoting distributed energy exploitation for the Internet of Things. However, MEG and TENG have application limitations in operation occasions and low power outputs. It remains challenging to reconcile both strategies in one device, since the MEG requires a high moisture environment, which is detrimental to the TENG. Herein, we designed a MEG-TENG hybrid energy harvester that shares a moisture-adaptive biomimetic aerogel with a highly-aligned interconnected porous structure allowing efficient moisture adsorption and migration, relieving the conflicting moisture effects and realizing synergistic electricity harvesting from moisture and triboelectrification, regardless of humidity ranging from 20 % to 90 %. The device combines the advantages of MEG's high current output and TENG's high voltage output, generating a maximum voltage of 106 V, an instantaneous current density of 400 μA cm−2, and an ultrahigh power density of 77 μW cm−2, surpassing the state-of-the-art performance of most energy harvesters. This synergistic device can be completely degraded and recycled, demonstrating a sustainable power source for wireless plant sensors, GPS locators, and wildlife monitoring. It presents a sustainable strategy towards distributed power sources and all-weather self-powered platforms.

原文链接：https://www.sciencedirect.com/science/article/abs/pii/S1385894725074224