ArticleSmall (Weinheim an der Bergstrasse, Germany)2026
2D Ultrathin Ion-Selective Membranes With Negatively Charged Interlayer Spacing Enabled by Edge-Sulfonated Graphene Oxide for Efficient Osmotic Power Generation.
Article in Small (Weinheim an der Bergstrasse, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Salinity gradient energy harvesting via reverse electrodialysis holds great potential for sustainable energy development, yet the inefficiency of ion-selective membranes remains a critical bottleneck. Although 2D material membranes have surpassed the commercial benchmark in microscale tests, their power densities deteriorate drastically with area expansion, presenting a prominent scalability challenge that hinders practical applications. To attain high power density across both small and large test areas, a heterogeneous membrane consisting of an edge-sulfonated graphene oxide (SGO) ultrathin selective layer and an oxidized micro fibrillated cellulose (OMFC) support layer was proposed. SGO enhances negative surface charge density and provides an expanded interlayer spacing, facilitating rapid and selective ion transport; OMFC enhances the membrane's structural stability and imparts significant negative surface charge density. Under the common test area, SGO-OMFC membrane achieves a notable power density of 132.7 W·m
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