Integrated Photoelectrochemical Solar Energy Conversion and Organic Redox Flow Battery Devices
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
KAUST Solar Center (KSC)
Physical Sciences and Engineering (PSE) Division
Division of Computer,Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology Thuwal 23955-6900 (Saudi Arabia)
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AbstractBuilding on regenerative photoelectrochemical solar cells and emerging electrochemical redox flow batteries (RFBs), more efficient, scalable, compact, and cost-effective hybrid energy conversion and storage devices could be realized. An integrated photoelectrochemical solar energy conversion and electrochemical storage device is developed by integrating regenerative silicon solar cells and 9,10-anthraquinone-2,7-disulfonic acid (AQDS)/1,2-benzoquinone-3,5-disulfonic acid (BQDS) RFBs. The device can be directly charged by solar light without external bias, and discharged like normal RFBs with an energy storage density of 1.15 Wh L−1 and a solar-to-output electricity efficiency (SOEE) of 1.7 % over many cycles. The concept exploits a previously undeveloped design connecting two major energy technologies and promises a general approach for storing solar energy electrochemically with high theoretical storage capacity and efficiency.
CitationLi W, Fu H-C, Li L, Cabán-Acevedo M, He J-H, et al. (2016) Integrated Photoelectrochemical Solar Energy Conversion and Organic Redox Flow Battery Devices. Angewandte Chemie International Edition 55: 13104–13108. Available: http://dx.doi.org/10.1002/anie.201606986.
SponsorsThis research is supported by UW-Madison and also partially supported by the NSF Grant DMR-1508558. H.-C.F. and J.-H.H. are supported by the KAUST baseline fund for design and fabrication of Si solar cells.