[Nano letters] 我室胡晟教授发表论文:Blue Energy Conversion from Holey-Graphene-like Membranes with a High Density of Subnanometer Pores

发布日期:2020年11月17日   浏览次数:

我室胡晟教授在 Nano letters 上发表论文:Blue Energy Conversion from Holey-Graphene-like Membranes with a High Density of Subnanometer Pores

文章链接:https://pubs.acs.org/doi/10.1021/acs.nanolett.0c03342

摘要:Blue energy converts the chemical potential difference from salinity gradients into electricity via reverse electrodialysis and provides a renewable source of clean energy. To achieve high energy conversion efficiency and power density, nanoporous membrane materials with both high ionic conductivity and ion selectivity are required. Here, we report ion transport through a network of holey-graphene-like sheets made by bottom-up polymerization. The resulting ultrathin membranes provide controlled pores of <10 Å in diameter with an estimated density of about 1012 cm–2. The pores’ interior contains NH2 groups that become electrically charged with varying pH and allow tunable ion selectivity. Using the holey-graphene-like membranes, we demonstrate power outputs reaching hundreds of watts per square meter. The work shows a viable route toward creating membranes with high-density angstrom-scale pores, which can be used for energy generation, ion separation, and related technologies.