In this article, a water-evaporation driven energy harvester is devised that works even in the absence of sunlight. This is achieved by combining PVA hydrogel with thermoelectrics (TEG) to directly c...

Evaporation, a ubiquitous process driving Earth’s water–energy cycle, has been largely untapped for energy harvesting. Here, we introduce “evapolectrics,” a scalable strategy that directly converts ev...