Fig. 1: Converting fallen leaves into leaf-based energy harvesters (LEHs) from ambient moisture. | Nature Communications

Fig. 1: Converting fallen leaves into leaf-based energy harvesters (LEHs) from ambient moisture.

From: Leaf-based energy harvesting and storage utilizing hygroscopic iron hydrogel for continuous power generation

Fig. 1

a Schematic illustration of the advantages of converting fallen leaves into self-powered energy harvesters from ambient moisture. The specific leaf cell groove structures, leaf central veins, and hygroscopic hydrogel with network structures play a significant role in improving and prolonging energy harvesting performance. b The energy generation mechanism of LEH. A phase change of water from the gaseous state to the liquid state could trigger the dislocation of iron hydrogel (i). Carbon black surface becomes negatively charged after contact with liquid water, followed by the electrical double layer (EDL) formation through cation adsorption (ii). Under external circuits, the electrons transfer to the external electrical appliances for power generation (iii).

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