A dual network hygroscopic gel for efficient atmospheric water harvesting

A dual-network K-car/PAM/PDA@LiCl hydrogel combines high hygroscopicity (0.46–2.90 g g −1 at 30–90% RH), robust mechanics, and >94% solar absorption, enabling rapid, stable AWH with 0.98 g g −1 day −1 water yield under natural sunlight.