Materials selection for optimum energy production by double layer expansion methods
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AuthorIglesias, Guillermo R.; Fernández, M. Mar; Ahualli, Silvia; Jiménez Olivares, María Luisa; Kozynchenko, Oleksander P.; Delgado, Ángel V.
Activated carbon particlesCapacitive energy extractionDouble layer expansionPore size distributionSupercapacitorsWettability
Iglesias, G.R; et al. Materials selection for optimum energy production by double layer expansion methods. Journal of Power Sources, (2014). [http://hdl.handle.net/10481/31503]
SponsorshipDepartamento de Física Aplicada, Universidad de Granada; The research leading to these results received funding from the European Union 7th Framework Programme (FP7/2007-2013) under agreement No. 256868. Further financial support from Junta de Andalucía (Spain), project PE-2008-FQM3993 is also gratefully acknowledged.
The capacitive mixing procedure for energy extraction based on Double Layer Expansion (CDLE) belongs to the group of so-called CAPMIX techniques, which aim at obtaining energy from the salinity difference between fresh and sea waters. Specifically, the CDLE technique takes advantage of the voltage rise that occurs when sea water is exchanged for river water in a pair of porous electrodes which jointly behave as an electrical double layer supercapacitor. In this article, we deal with some experimental aspects that are key for optimizing the extracted energy, and have not been analyzed yet with sufficient detail. This investigation will help in evaluating those parameters which we need to be fixed in a future CDLE device. These include the charging potential, the durations of the different cycle steps, the load resistance used, and the porosity and hydrophilicity of the carbon.