Here, a thin, porous, mechanically stable and high LiCl-loading content super-hygroscopic SA-MXene@LiCl membrane (SM@LiCl) was fabricated via vacuum-assisted filtration and freeze-drying methods. The thin and porous characteristics of the cross-linked SA-MXene network significantly reduce moisture transport resistance, while the wrapped hygroscopic LiCl effectively enhances its moisture capture capacity.
When applied to SAWH, this nanocomposite membrane demonstrates an impressive water uptake performance of 1.69 g gâ1 within 1 h at 45 % RH and releases over 65 % of absorbed water after only 0.5 h of sunlight irradiation (1 kW/m2).
With its high moisture sorption capacity and rapid ab/desorption kinetics, it can operate for up to 16Â cycles per day in indoor environment, resulting in a record daily water yield of 19.46Â LÂ kgâ1 at 45Â % RH. The present study presents a straightforward approach for the development of high-quality sorbents with improved ab/desorption kinetics for SAWH.