Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 13104-13108 |
| Number of pages | 5 |
| Journal | Angewandte Chemie International Edition |
| Volume | 55 |
| Issue number | 42 |
| DOIs | |
| State | Published - Oct 6 2016 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: 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.