Sub-Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands.
Environ Sci Technol. 2012 Nov 6;46(21):12203-8. doi: 10.1021/es302169c. Epub 2012 Oct 9.
Energy extraction based on capacitive Donnan potential (CDP) is a recently suggested technique for sustainable power generation. CDP combines the use of ion-exchange membranes and porous carbon electrodes to convert the Gibbs free energy of mixing sea and river water into electric work. The electrodes geometry has a relevant impact on internal resistance and overall performance in CDP. In this work, we present the first effort to use wire-shaped electrodes and its suitability for improving CDP. Analytical evaluation and electrical measurements confirm a strong nonlinear decrease in internal resistance for distances between electrodes smaller than 3 mm. We also demonstrated that we get more power per material invested when compared to traditional flat plate designs. These findings show the advantages of this design for further development of CDP into a mature technology.
基于电容性唐南电位 (CDP) 的能量提取是一种最近提出的可持续发电技术。CDP 结合使用离子交换膜和多孔碳电极，将海水和河水混合的吉布斯自由能转化为电能。电极的几何形状对 CDP 中的内阻和整体性能有重要影响。在这项工作中，我们首次尝试使用线状电极，并评估其对 CDP 的适用性。分析评估和电气测量证实，当电极之间的距离小于 3 毫米时，内阻呈强烈的非线性下降。我们还证明，与传统的平板设计相比，我们每投入一份材料就能获得更多的功率。这些发现表明，这种设计为进一步将 CDP 开发成熟技术提供了优势。
