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Humans are facing global water shortages and energy shortages in data centers, and using water from the air to solve water and electricity problems is a promising approach. Here, a porous moisture-absorbing hydrogel is incorporated, made from sodium alginate co-loaded with Fe³⁺ and Li⁺. Hydrophilic adsorption sites are built through ionic cross-linking and salt-assisted loading, achieving low desorption enthalpy (<40 kJ mol⁻¹) for efficient water release. The moisture absorption of the dual-ion hydrogel exceeds 5.1 g per gram at 90% relative humidity and 1.1 g per gram at 30% RH. By designing a water collection device with rotating adsorption/desorption zones, daily water production per hydrogel is 11.8 liters at 70% humidity. The hydrogel not only provides abundant sites for water adsorption and storage but also channels for ion transport, enhancing power generation. By creating an asymmetric humidity structure, dissociated cations in the hydrogel diffuse to the substrate along a concentration gradient, generating current, resulting in a high short-circuit current (250 μA) and open-circuit voltage (7.6 V), enough to light up multiple LED lights.
We focus on customized functional materials in the field of nanomedicine. Based on your experimental needs, we can develop biofunctional nanomaterials, control material structure, particle size, and surface modification, and provide full characterization testing. The solutions can be repeatedly optimized with full technical support throughout, supporting research projects in targeted delivery, bioimaging, nanodiagnostics, and therapy. Feel free to provide your requirements, and we’ll evaluate customized solutions.
Engineer Zhang: 17715390137
Engineer Chen: 18914047343
