In traditional reverse electrodialysis (RED) stacks, the output power is severely lost due to the shadow effect caused by the nonpermselective spacers. To inhibit the spacer shadow effect, a design on ion‐permselective woven net spacer is proposed. By combining the linear sweep voltammetry and electrochemical impedance spectroscopy methods, the effectiveness of permselective woven net spacer is validated together with the shadow effect and concentration polarization measured quantitatively. Additionally, their influence on stack resistance and power production is investigated under various factors. When contrasted to nonpermselective spacers, the use of permselective woven net spacers reduces the spacer shadow effect by 90% whereas also exacerbating the concentration polarization. This results in a higher power density due to a dramatic reduction in resistance. However, compared with permselective spacers, the permselective woven net spacers increase the power density due to its weaker concentration polarization. The factors including the solution concentration, temperature, and spacer thickness have a considerable influence on the power production of stack. Especially, increasing the concentration of concentrated solution alone is most beneficial to improving the output power while the impact of spacer thickness is the weakest.

中文翻译：

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使用离子选择性渗透编织网间隔物提高反向电渗析堆的发电量

在传统的反向电渗析（RED）堆栈中，由于非选择性渗透间隔物造成的阴影效应，输出功率严重损失。为了抑制间隔物阴影效应，提出了一种离子选择性渗透编织网间隔物的设计。通过结合线性扫描伏安法和电化学阻抗谱方法，结合定量测量的阴影效应和浓差极化，验证了选择性渗透编织网间隔物的有效性。此外，还研究了在各种因素下它们对堆电阻和发电量的影响。与非选择性渗透垫片相比，使用选择性渗透编织网垫片可将垫片阴影效应降低 90%，同时也会加剧浓差极化。由于电阻的显着降低，这导致了更高的功率密度。然而，与选择性渗透间隔物相比，选择性渗透编织网间隔物由于其浓差极化较弱而增加了功率密度。溶液浓度、温度、隔离物厚度等因素对电堆的发电量有相当大的影响。其中，单独提高浓溶液的浓度对提高输出功率最为有利，而隔离物厚度的影响最弱。