In the capacitive mixing technique, the electrode used to extract blue energy is typically composed of a carbon-based porous electrode material. Polyelectrolyte (PE) surface coating on porous electrodes serves as an intermediate soft layer, which can significantly enhance the energy extraction performance (EEP). Herein, the blue energy extraction performance by using PE-coated electrodes is studied by a statistical thermodynamic theory, with the exploration of the interplay effects between opposing polyelectrolyte interactions and pore size. Because of the interaction between opposing PE coatings, the response of electrostatic properties in the pore to surface potential variations is enhanced during charging/discharging processes, leading to a better EEP. Both the surface charge accumulation and surface potential rise in the charging process can be raised as the results of PE coating. For the cases studied, the extraction efficiency can be promoted up to 45% compared with the cases of bare electrodes. For narrow pores, the PE promotion effects are suppressed by strong pore confinement. The optimal PE coating condition is determined by the competitive results between pore size (H) and polyelectrolyte chain length (N), with that Ĥ ≡ H/(2Nσ) being mostly in [0.1, 0.5], where σ is the PE segment diameter.

中文翻译：

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聚电解质涂层多孔电极的 Blue Energy 提取性能：微孔中相反聚电解质相互作用的影响


在电容式混合技术中，用于提取蓝色能量的电极通常由碳基多孔电极材料组成。多孔电极上的聚电解质 （PE） 表面涂层作为中间软层，可以显著提高能量提取性能 （EEP）。本文通过统计热力学理论研究了使用 PE 涂层电极的蓝色能量提取性能，并探索了相反的聚电解质相互作用与孔径之间的相互作用。由于相反的 PE 涂层之间的相互作用，在充电/放电过程中，孔隙中的静电特性对表面电位变化的响应得到增强，从而获得更好的 EEP。充电过程中的表面电荷积累和表面电位上升都可以作为 PE 涂层的结果而提高。对于所研究的情况，与裸电极的情况相比，提取效率可以提高 45%。对于狭窄的毛孔，PE 促进效果会受到强毛孔限制的抑制。最佳 PE 涂层条件由孔径 （H） 和聚电解质链长度 （N） 之间的竞争结果决定，其中 Ĥ ≡ H/（2Nσ） 主要在 [0.1， 0.5] 范围内，其中 σ 是 PE 链段直径。