Abstract Reverse electrodialysis (RED) is a technique that utilizes the salinity gradient through ion exchange membranes to generate electrical power. In order to make this technology feasible, innovation is required to improve a critical subcomponent, the ion exchange membrane, especially in the selection of appropriate membrane materials and the design of proper RED membranes. This study presents a novel and cost-competitive method for the design of anion exchange membranes (AEMs) by organic-organic hybridization. The low-cost and charge-possessing polymer, poly (diallyldimethylammonium chloride) and poly (vinyl alcohol) (abbreviated as PDDA and PVA, respectively) are blended in different mass ratios to form an AEM. The effect of various PDDA loadings on the electrochemical characterizations of the membranes was investigated. The key properties such as electrical resistance, permselectivity and ion exchange capacity were found to be improved with increasing the mass blend ratio of PDDA. Specifically, the increase of PDDA mass ratio significantly decreased the level of membrane resistance, which majorly contributed to the performance of RED power generation: reached the maximum power density of 0.58 W/m2. Such fabrication method of AEMs may provide the feasible design strategy of potential ion exchange membranes for a viable RED energy conversion.

中文翻译：

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盐度梯度能量混合阴离子交换膜的电化学表征和反电渗析性能

摘要 反向电渗析 (RED) 是一种利用盐度梯度通过离子交换膜产生电能的技术。为了使这项技术可行，需要创新来改进一个关键的子组件，即离子交换膜，特别是在选择合适的膜材料和设计合适的 RED 膜方面。本研究提出了一种通过有机-有机杂交设计阴离子交换膜 (AEM) 的新颖且具有成本竞争力的方法。低成本且带电荷的聚合物聚（二烯丙基二甲基氯化铵）和聚乙烯醇（分别缩写为 PDDA 和 PVA）以不同的质量比混合形成 AEM。研究了各种 PDDA 负载量对膜电化学特性的影响。发现电阻、渗透选择性和离子交换容量等关键特性随着 PDDA 质量混合比的增加而得到改善。具体而言，PDDA质量比的增加显着降低了膜电阻水平，这主要有助于RED发电的性能：达到0.58 W/m2的最大功率密度。这种 AEMs 的制造方法可以为可行的 RED 能量转换提供潜在离子交换膜的可行设计策略。达到了 0.58 W/m2 的最大功率密度。这种 AEMs 的制造方法可以为可行的 RED 能量转换提供潜在离子交换膜的可行设计策略。达到了 0.58 W/m2 的最大功率密度。这种 AEMs 的制造方法可以为可行的 RED 能量转换提供潜在离子交换膜的可行设计策略。