Simultaneous atmospheric water production and 24-hour power generation enabled by moisture-induced energy harvesting

Tingxian Li (), Minqiang Wu, Jiaxing Xu, Ruxue Du, Taisen Yan, Pengfei Wang, Zhaoyuan Bai, Ruzhu Wang and Siqi Wang
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Tingxian Li: Shanghai Jiao Tong University
Minqiang Wu: Shanghai Jiao Tong University
Jiaxing Xu: Shanghai Jiao Tong University
Ruxue Du: Shanghai Jiao Tong University
Taisen Yan: Shanghai Jiao Tong University
Pengfei Wang: Shanghai Jiao Tong University
Zhaoyuan Bai: Shanghai Jiao Tong University
Ruzhu Wang: Shanghai Jiao Tong University
Siqi Wang: Shanghai Jiao Tong University

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Water and electricity scarcity are two global challenges, especially in arid and remote areas. Harnessing ubiquitous moisture and sunlight for water and power generation is a sustainable route to address these challenges. Herein, we report a moisture-induced energy harvesting strategy to realize efficient sorption-based atmospheric water harvesting (SAWH) and 24-hour thermoelectric power generation (TEPG) by synergistically utilizing moisture-induced sorption/desorption heats of SAWH, solar energy in the daytime and radiative cooling in the nighttime. Notably, the synergistic effects significantly improve all-day thermoelectric power density (~346%) and accelerate atmospheric water harvesting compared with conventional designs. We further demonstrate moisture-induced energy harvesting for a hybrid SAWH-TEPG device, exhibiting high water production of 750 g m−2, together with impressive thermoelectric power density up to 685 mW m−2 in the daytime and 21 mW m−2 in the nighttime. Our work provides a promising approach to realizing sustainable water production and power generation at anytime and anywhere.

Date: 2022
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DOI: 10.1038/s41467-022-34385-4

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