A Long Lifetime Aqueous Organic Solar Flow Battery

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

8 Scopus Citations
View graph of relations


  • Wenjie Li
  • Emily Kerr
  • Marc-Antoni Goulet
  • Hui-Chun Fu
  • Yuzhou Zhao
  • Ying Yang
  • Atilla Veyssal
  • Roy G. Gordon
  • Michael J. Aziz
  • Song Jin


Original languageEnglish
Article number1900918
Journal / PublicationAdvanced Energy Materials
Issue number31
Online published8 Jul 2019
Publication statusPublished - 21 Aug 2019
Externally publishedYes


Monolithically integrated solar flow batteries (SFBs) hold promise as compact stand-alone energy systems for off-grid solar electrification. Although considerable research is devoted to studying and improving the round-trip efficiency of SFBs, little attention is paid to the device lifetime. Herein, a neutral pH aqueous electrolyte SFB with robust organic redox couples and inexpensive silicon-based photoelectrodes is demonstrated. Enabled by the excellent stability of both electrolytes and protected photoelectrodes, this SFB device exhibits not only unprecedented stable continuous cycling performance over 200 h but also a capacity utilization rate higher than 80%. Moreover, through comprehensive study on the working mechanisms of SFBs, a new theory based on instantaneous solar-to-output electricity efficiency toward more optimized device design is developed and a significantly improved solar-to-output electricity efficiency of 5.4% from single-junction silicon photoelectrodes is realized. The design principles presented in this work for extending device lifetime and boosting round trip energy efficiency will make SFBs more competitive for off-grid applications.

Research Area(s)

  • electrochemistry, integrated devices, redox flow batteries, solar energy, solar flow batteries

Citation Format(s)

A Long Lifetime Aqueous Organic Solar Flow Battery. / Li, Wenjie; Kerr, Emily; Goulet, Marc-Antoni; Fu, Hui-Chun; Zhao, Yuzhou; Yang, Ying; Veyssal, Atilla; He, Jr-Hau; Gordon, Roy G.; Aziz, Michael J.; Jin, Song.

In: Advanced Energy Materials, Vol. 9, No. 31, 1900918, 21.08.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal