Effect of Solution Composition on the Energy Production by Capacitive Mixing in Membrane-Electrode Assembly.
Effect of Solution Composition on the Energy Production by Capacitive Mixing in Membrane-Electrode Assembly.
复制标题
DOI：
10.1021/jp504461m
复制
发表时间：
2014-07-24
期刊：
影响因子：
--
通讯作者：
Delgado AV
中科院分区：
文献类型：
--
作者：
Ahualli S;Fernández MM;Iglesias G;Jiménez ML;Liu F;Wagterveld M;Delgado AV
在这项工作中，我们考虑在何种程度上多价离子在溶液中的存在下修改的平衡和动态的能量生产中的电容性电池与离子交换膜与高表面积电极接触。开路中的细胞电位（OCV）由两个膜电位之间的差控制，模拟为恒定体积电荷区域。阐述了稳态OCV的理论模型，首先在单价溶液的情况下，作为参考。这是比较的结果，在多离子系统中，含有二价阳离子的浓度类似于那些在真实的海水。研究发现，由于二价离子的存在，即使在低浓度下，开路电压也降低了约25%（与纯氯化钠溶液中的结果相比）。有趣的是，这可能与这些离子逆其浓度梯度的“上坡”运输有关。相反，在高电荷膜的情况下，它们对细胞电势的动态的影响是可以忽略的。模型预测和实验结果之间的比较表明，一个非常令人满意的协议，并为这些最近推出的能源生产方法的实际应用提供了线索。
In this work, we consider the extent to which the presence of multivalent ions in solution modifies the equilibrium and dynamics of the energy production in a capacitive cell built with ion-exchange membranes in contact with high surface area electrodes. The cell potential in open circuit (OCV) is controlled by the difference between both membrane potentials, simulated as constant volume charge regions. A theoretical model is elaborated for steady state OCV, first in the case of monovalent solutions, as a reference. This is compared to the results in multi-ionic systems, containing divalent cations in concentrations similar to those in real seawater. It is found that the OCV is reduced by about 25% (as compared to the results in pure NaCl solutions) due to the presence of the divalent ions, even in low concentrations. Interestingly, this can be related to the “uphill” transport of such ions against their concentration gradients. On the contrary, their effect on the dynamics of the cell potential is negligible in the case of highly charged membranes. The comparison between model predictions and experimental results shows a very satisfactory agreement, and gives clues for the practical application of these recently introduced energy production methods.
登录
查看更多内容
影响因子：
3.7
作者：
Rica, Raul A.;Brogioli, Doriano;Ziano, Roberto;Salerno, Domenico;Mantegazza, Francesco
通讯作者：
Mantegazza, Francesco
影响因子：
8.6
作者：
Brogioli, Doriano
通讯作者：
Brogioli, Doriano
影响因子：
9.5
作者：
Veerman, J.;Saakes, M.;Harmsen, G. J.
通讯作者：
Harmsen, G. J.
影响因子：
3.7
作者：
Burheim, Odne S.;Liu, Fei;Hamelers, Hubertus V. M.
通讯作者：
Hamelers, Hubertus V. M.
影响因子：
11.4
作者：
Post, Jan W.;Hamelers, Hubertus V. M.;Buisman, Cees J. N.
通讯作者：
Buisman, Cees J. N.