Modification of the surface of activated carbon electrodes for capacitive mixing energy extraction from salinity differences.
Modification of the surface of activated carbon electrodes for capacitive mixing energy extraction from salinity differences.
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DOI：
10.1016/j.jcis.2014.08.070
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发表时间：
2014-12
影响因子：
9.9
通讯作者：
M. Marino;L. Misuri;M. L. Jiménez;S. Ahualli;Oleksei Kozynchenko;Steve Tennison;Marek Bryjak
中科院分区：
文献类型：
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作者：
M. Marino;L. Misuri;M. L. Jiménez;S. Ahualli;Oleksei Kozynchenko;Steve Tennison;Marek Bryjak
“电容混合”（CAPMIX）是旨在从海洋和河流之间的盐度差异中提取能量的技术之一。它是基于两个电极之间的电压上升，当它们所浸入的溶液的盐浓度改变时发生。我们研究了活性炭电极在NaCl溶液中的电位上升，作为其充电状态的函数。我们评估了通过吸附带电分子获得的材料的改性的效果。我们观察到位移的潜在的潜在上升消失，如预测的双电层理论。此外，我们观察到在高充电状态的电位上升的饱和，几乎是独立的分析材料的值。这种饱和度代表了最相关的元素，决定了正在研究的CAPMIX电池的性能，我们把它归因于动力学效应。
The “capacitive mixing” (CAPMIX) is one of the techniques aimed at the extraction of energy from the salinity difference between sea and rivers. It is based on the rise of the voltage between two electrodes, taking place when the salt concentration of the solution in which they are dipped is changed. We study the rise of the potential of activated carbon electrodes in NaCl solutions, as a function of their charging state. We evaluate the effect of the modification of the materials obtained by adsorption of charged molecules. We observe a displacement of the potential at which the potential rise vanishes, as predicted by the electric double layer theories. Moreover, we observe a saturation of the potential rise at high charging states, to a value that is nearly independent of the analyzed material. This saturation represents the most relevant element that determines the performances of the CAPMIX cell under study; we attribute it to a kinetic effect.