Abstract
Industrial waste steam is one of the major sources of global energy losses. Therefore, the collection and conversion of waste steam energy into electricity have aroused great interest. Here, a "two-in-one" strategy is reported that combines thermoelectric and moist-electric generation mechanisms for a highly efficient flexible moist-thermoelectric generator (MTEG). The spontaneous adsorption of water molecules and heat in the polyelectrolyte membrane induces the fast dissociation and diffusion of Na+ and H+ , resulting in the high electricity generation. Thus, the assembled flexible MTEG generates power with a high open-circuit voltage (Voc ) of 1.81V (effective area=1cm2 ) and a power density of up to 4.75±0.4µWcm-2 . With efficient integration, a 12-unit MTEG can produce a Voc of 15.97V, which is superior to most known TEGs and MEGs. The integrated and flexible MTEGs reported herein provide new insights for harvesting energy from industrial waste steam.
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