Solid　hygroscopic　materials　are　extensively　utilized　in　diverse　fields,　including　adsorption　heat　transfer,　adsorption　heat　storage,　atmospheric　water　harvesting　(AWH),　and　air　conditioning　dehumidification.　The　efficacy　and　energy　efficiency　of　these　materials　in　practical　applications　are　significantly　influenced　by　their　adsorption　and　desorption　properties.　Yet,　the　introduction　of　inorganic　salts　to　boost　adsorption　performance　can　result　in　issues　like　salt　leakage.　In　this　research,　we　prepared　a　polyacrylamide　hydrogel　through　free　radical　polymerization,　and　its　water-absorbing　capabilities　were　improved　by　incorporating　the　hygroscopic　salt　lithium　chloride.　We　compared　it　to　a　salt-based　porous　adsorbent,　AlFum-LiCl,　which　also　exhibited　strong　water　adsorption　properties　and　the　potential　for　large-scale　production.　While　AlFum-LiCl　suffered　from　limited　pores　and　salt　leakage　during　high　water　uptake,　the　optimized　PAM-LiCl　displayed　superior　water　sorption　capabilities,　showing　no　salt　leakage　even　at　water　uptake　of　up　to　3.5　g/g.　At　25　°C,　PAM-LiCl　achieved　equilibrium　water　uptake　of　1.26　g/g　at　30%　RH　and　3.15　g/g　at　75%　RH.　In　this　context,　utilizing　20　g　of　PAM-LiCl　for　the　AWH　experiment　yielded　daily　water　outputs　of　8.34　L/kg　at　30%　RH　and　16.86　L/kg　at　75%　RH.　The　salt-optimized　PAM-LiCl　hydrogel　offers　the　benefit　of　application　in　higher　relative　humidity　environments　without　the　risk　of　deliquescence,　underscoring　its　promise　for　atmospheric　water　harvesting.　©　2024　by　the　authors.