Salt deposition is a disturbing problem that limits the development of passive solar‐driven interfacial evaporation. Inspired by the passive fluid control mechanism of the Tesla valve, a novel solar evaporator is proposed with a Tesla valve‐like water transport structure to prevent salt accumulation at the evaporation interface. A unique “ion diode” salt resistance of this evaporator is significantly achieved by optimizing the two asymmetric water transport structures, consisting of one Tesla valve‐like side and one wide‐leg side, which establish a reverse‐suppressing and forward‐accelerating water transport channel. In contrast to the limited ion migration of the typical symmetric solar evaporator, such a channel caused by the water/salt ions transport difference between two water supply structures, reinforces the water/salt ions supply on the wide‐leg side, thus leading to an apparent unidirectional salt ions migration from the wide‐leg side to bulk water through the Tesla valve‐like side. Consequently, an evaporation rate of 3.25 kg m−2 h−1 and a conversion efficiency of 83.27% under 2 suns are achieved in 16 wt% NaCl solution. The development of the Tesla Valve‐like evaporator provides a new perspective for solving salt deposition and realizing scalable applications of solar‐driven interfacial evaporation.

中文翻译：

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通过类特斯拉阀的水传输结构实现太阳能界面蒸发中的“离子二极管”耐盐性


盐沉积是一个令人不安的问题，限制了被动式太阳能驱动界面蒸发的发展。受特斯拉阀被动流体控制机制的启发，提出了一种新型太阳能蒸发器，其具有类特斯拉阀的水传输结构，以防止蒸发界面处的盐积聚。该蒸发器独特的“离子二极管”抗盐性能是通过优化两个不对称水传输结构显着实现的，该结构由一个特斯拉阀状侧面和一个宽腿侧面组成，建立了反向抑制和向前加速的水传输渠道。与典型对称太阳能蒸发器的有限离子迁移相反，这种由两个供水结构之间的水/盐离子传输差异引起的通道加强了宽腿侧的水/盐离子供应，从而导致明显的单向盐离子从阔腿侧通过特斯拉阀状侧迁移到散装水中。因此，在16 wt% NaCl溶液中，2个太阳下的蒸发速率为3.25 kg m−2 h−1，转换效率为83.27%。类特斯拉阀蒸发器的开发为解决盐沉积和实现太阳能驱动界面蒸发的可扩展应用提供了新的视角。