Meta-Aerogel Ion Motor for Nanofluid Osmotic Energy Harvesting,Advanced Materials

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Meta-Aerogel Ion Motor for Nanofluid Osmotic Energy Harvesting
Advanced Materials ( IF 27.4 ) Pub Date : 2023-06-09 , DOI: 10.1002/adma.202302511
Feng Zhang ₁ , Jianyong Yu _{1,

2} , Yang Si _{1,

2} , Bin Ding _{1,

2}

Affiliation

Osmotic power, also known as “blue energy”, is a vast, sustainable, and clean energy source that can be directly converted into electricity by nanofluidic membranes. However, the key technological bottleneck for large-scale osmotic electricity is that macroscopic-scale bulky membrane cannot synergistically satisfy the demands of high power density and low resistance without sacrificing scalability and mechanical robustness. Here, inspired by the anatomy and working principle of electric eels, which harness osmotic energy through embedded neuron-mediated fibril nanochannels with nanoconfined transport dynamics. Fibrous nanofluidic meta-aerogel ion motors, 3D-assembled from nanofluidic cable fibers with actuatable stimulation/transport “ion highways” are engineered. The meta-aerogel exhibits the integrated coupling effect of boosted ion propulsion and surface-charge-dominated selective ion transport. Driven by osmosis, the meta-aerogel ion motor can produce an unprecedented output power density of up to 30.7 W m⁻² under a 50-fold salinity gradient. Advancing ultra-selective ion transport in nanofluidic meta-aerogels may provide a promising roadmap for blue energy harvesting.

中文翻译：

用于纳米流体渗透能量收集的元气凝胶离子马达

渗透能，也被称为“蓝色能源”，是一种巨大的、可持续的、清洁的能源，可以通过纳米流体膜直接转化为电能。然而，大规模渗透电的关键技术瓶颈是宏观尺度的大体积膜无法在不牺牲可扩展性和机械鲁棒性的情况下协同满足高功率密度和低电阻的要求。在这里，受到电鳗的解剖学和工作原理的启发，电鳗通过具有纳米限制运输动力学的嵌入式神经元介导的原纤维纳米通道来利用渗透能。纤维纳米流体元气凝胶离子发动机由纳米流体电缆纤维 3D 组装而成，具有可驱动的刺激/传输“离子高速公路”。超气凝胶表现出增强离子推进和表面电荷主导的选择性离子传输的综合耦合效应。在渗透作用的驱动下，超气凝胶离子发动机可以在50倍盐度梯度下产生高达30.7 W m ^{−2的前所未有的输出功率密度。}推进纳米流体超气凝胶中的超选择性离子传输可能为蓝色能量收集提供有希望的路线图。

更新日期：2023-06-09

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