Polylectrolyte- versus membrane-coated electrodes for energy production by Capmix salinity exchange methods Fernández, M. Mar Wagterveld, R. M. Ahualli Yapur, Silvia Alejandra Liu, Fei Delgado Mora, Ángel Vicente Hamelers, H. V. M. Blue energy Capmix techniques CDP Donnan potential Carbon Electrodes Polyelectrolyte coating La versión final publicada se puede encontrar en: Journal of Power Sources, 302(20): 387-393 (2016). http://dx.doi.org/10.1016/j.jpowsour.2015.10.076 In this paper we analyze the energy and power achievable by means of a re- cently proposed salinity gradient technique for energy production. The method, denominated soft electrode or SE, is based on the potential di erence that can be generated between two porous electrodes coated with cationic and anionic polyelectrolytes. It is related to the Capacitive Donnan Potential (CDP) tech- nique, where the electrical potential variations are mostly related to the Donnan potential, of ion-selective membranes in the case of CDP, and of the polyelec- trolyte coating in SE. It is found that although SE is comparable to CDP in terms of energy production, it presents slower rates of voltage change, and lower achieved power. The separate analysis of the response of positively and neg- atively coated electrodes shows that the latter produces most of the voltage rise and also of the response delay. These results, together with electrokinetic techniques, give an idea on how the two types of polyelectrolytes adsorb on the carbon surface and a ect di erently the di usion layer. It is possible to suggest that the SE technique is a promising one, and it may overcome the drawbacks associated to the use of membranes in CDP. 2015-11-13T09:57:18Z 2015-11-13T09:57:18Z 2015 info:eu-repo/semantics/preprint Fernández, M.M.; et al. Polylectrolyte- versus membrane-coated electrodes for energy production by Capmix salinity exchange methods. Journal of Power Sources, 302(20): 387-393 (2016). [http://hdl.handle.net/10481/38829] 0378-7753 http://hdl.handle.net/10481/38829 10.1016/j.jpowsour.2015.10.076 eng CAPMIX HOLANDA;3 info:eu-repo/grantAgreement/EC/FP7/256868 http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Elsevier