Fig. 2: Moisture adsorption and water evaporation behaviors of the hygroscopic layer and the evaporative layer. | Nature Communications

Fig. 2: Moisture adsorption and water evaporation behaviors of the hygroscopic layer and the evaporative layer.

From: Self-sustained electricity generator driven by the compatible integration of ambient moisture adsorption and evaporation

Fig. 2

a, b Moisture adsorption kinetics of the hygroscopic layer and the hygroscopic/ evaporative bilayer structure. c Schematic of mass transfer between the two layers. Baseline: The hygroscopic layer and the evaporative layer was separated by a separator to prevent mass transfer between them. Device 1: The outside surface of the evaporative layer was covered by a separator to prevent evaporation. Device 2: Without any additional refitment. The letters I-VI represent the hygroscopic layer and the evaporative layer of the three devices, respectively. The arrows represent the transfer of water. d Mass change in different parts of the devices at 25 °C, 70% RH. e Water content map of the SSEG after moisture adsorption in 60% RH for over 30 h. The water content map was depicted by gravimetrically analyzing water absorbed by each layer. The resolution corresponds to the film thickness, which is 0.25 mm for the hygroscopic layer, and 0.33 mm for the evaporative layer. f Mass change in the bilayer structures of the hygroscopic layer/cellulon paper and the hygroscopic layer/evaporative layer versus time under one-sun illumination.

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