Integrated Photoelectrochemical Solar Energy Conversion and Organic Redox Flow Battery Devices

Wenjie Li, Hui-Chun Fu, Linsen Li, Miguel Cabán-Acevedo, Jr-Hau He, Song Jin

Research output: Contribution to journalArticlepeer-review

97 Scopus citations


Building 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.
Original languageEnglish (US)
Pages (from-to)13104-13108
Number of pages5
JournalAngewandte Chemie International Edition
Issue number42
StatePublished - Oct 6 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This 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.


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