Exceptional water production yield enabled by batch-processed portable water harvester in semi-arid climate
2022-09-15 NATURE COMMUNICATIONS 2022 13(卷), 1(期), (null页)
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Sorption-based atmospheric water harvesting has the potential to realize water production anytime, anywhere, but reaching a hundred-gram high water yield in semi-arid climates is still challenging, although state-of-the-art sorbents have been used. Here, we report a portable and modularized water harvester with scalable, low-cost, and lightweight LiCl-based hygroscopic composite (Li-SHC) sorbents. Li-SHC achieves water uptake capacity of 1.18, 1.79, and 2.93 g g(-1) at 15%, 30%, and 60% RH, respectively. Importantly, considering the large mismatch between water capture and release rates, a rationally designed batch processing mode is proposed to pursue maximum water yield in a single diurnal cycle. Together with the advanced thermal design, the water harvester shows an exceptional water yield of 311.69 g day(-1) and 1.09 g g(sorbent)(-1) day(-1) in the semi-arid climate with the extremely low RH of similar to 15%, demonstrating the adaptability and possibility of achieving large-scale and reliable water production in real scenarios.
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