Print Email Facebook Twitter Design principles for efficient photoelectrodes in solar rechargeable redox flow cell applications Title Design principles for efficient photoelectrodes in solar rechargeable redox flow cell applications Author Bae, D. (TU Delft ChemE/Materials for Energy Conversion and Storage) Kanellos, Gerasimos (Student TU Delft) Faasse, G.M. (TU Delft Applied Sciences) Dražević, Emil (Aarhus University) Venugopal, A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Smith, W.A. (TU Delft ChemE/Materials for Energy Conversion and Storage; NREL) Faculty Applied Sciences Date 2020 Abstract Recent advances in photoelectrochemical redox flow cells, such as solar redox flow batteries, have received much attention as an alternative integrated technology for simultaneous conversion and storage of solar energy. Theoretically, it has been reported that even single- photon devices can demonstrate unbiased photo-charging with high solar-to-chemical con- version efficiency; however, the poor redox kinetics of photoelectrodes reported thus far severely limit the photo-charging performance. Here, we report a band alignment design and propose surface coverage control to reduce the charge extraction barrier and create a facile carrier pathway from both n- and p-type photoelectrodes to the electrolyte with the respective redox reaction. Based on these observations, we develop a single-photon photo- charging device with a solar-to-chemical conversion efficiency over 9.4% for a redox flow cell system. Along with these findings, we provide design principles for simultaneous optimisa- tion, which may lead to enhanced conversion efficiency in the further development of solar- rechargeable redox flow cells. Subject Photoelectrochemical cellsPhotoelectrochemistryRedox flow batteryDevice designRenewable energy (system)Energy storageSolar-battery integration, thermal analisys, thermal management, phase change materials.OA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:5e235296-27be-4ddf-a105-c4aa3c6584cb DOI https://doi.org/10.1038/s43246-020-0020-7 ISSN 2662-4443 Source Communications Materials, 1 (1) Part of collection Institutional Repository Document type journal article Rights © 2020 D. Bae, Gerasimos Kanellos, G.M. Faasse, Emil Dražević, A. Venugopal, W.A. Smith Files PDF s43246_020_0020_7_final_version.pdf 1.79 MB Close viewer /islandora/object/uuid:5e235296-27be-4ddf-a105-c4aa3c6584cb/datastream/OBJ/view