Erschienen in:
ChemSusChem, 10 (2017) 7, Seite 1600-1606
Sprache:
Englisch
DOI:
10.1002/cssc.201601656
ISSN:
1864-5631;
1864-564X
Entstehung:
Hochschulschrift:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Salinity‐gradient energy (SGE) is a renewable energy source available wherever two solutions with different salinity mix. Capacitive‐mixing (Capmix) is a technology that directly extracts the SG potential through the movements of ions in high‐ and low‐concentration solutions. However, the energy‐harvesting performance of Capmix needs further improvement. Herein, a hybrid Capmix that consists of a battery and capacitive electrodes is proposed. In this system, sodium ions and anions are captured/released by the metal oxide and carbon electrodes, respectively. The hybrid Capmix extracted an energy density that was approximately three times higher (130 J m<jats:sup>−2</jats:sup>) and exhibited a notable power output (97 mW m<jats:sup>−2</jats:sup>) compared to the previous Capmix using ion‐exchange membranes. Furthermore, the hybrid system operated successfully with real river water and seawater. These results suggest that the hybrid Capmix could be a viable option to harvest energy from salinity gradients.</jats:p>