A Phosphonate-Functionalized Quinone Redox Flow Battery at Near-Neutral pH with Record Capacity Retention Rate
Journal Article
·
· Advanced Energy Materials
- Harvard Univ., Cambridge, MA (United States); Harvard John A. Paulson School of Engineering and Applied Sciences
- Harvard Univ., Cambridge, MA (United States)
A highly stable phosphonate-functionalized anthraquinone is introduced as the redox-active material in a negative potential electrolyte (negolyte) for aqueous redox flow batteries operating at nearly neutral pH. Here, the design and synthesis of 2,6-DPPEAQ, (((9,10-dioxo-9,10-dihydroanthracene-2,6-diyl)bis(oxy))bis(propane-3,1-diyl))bis(phosphonic acid), which has a high solubility at pH 9 and above, is described. Chemical stability studies demonstrate high stability at both pH 9 and 12. By pairing 2,6-DPPEAQ with a potassium ferri/ferrocyanide positive electrolyte across an inexpensive, nonfluorinated permselective polymer membrane, this near-neutral quinone flow battery exhibits an open-circuit voltage of 1.0 V and a capacity fade rate of 0.00036% per cycle and 0.014% per day, which is the lowest ever reported for any flow battery in the absence of rebalancing processes. It is further demonstrated that the negolyte pH drifts upward upon atmospheric oxygen penetration but, when oxygen is excluded, oscillates reversibly between 9 and 12 during cycling. These results enhance the suitability of aqueous-soluble redox-active organics for use in large-scale energy storage, potentially enabling massive penetration of intermittent renewable electricity.
- Research Organization:
- Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences (SEAS); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- Innovation Fund Denmark; Massachusetts Clean Energy Technology Center; National Science Foundation; USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1661884
- Alternate ID(s):
- OSTI ID: 1493638
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 12 Vol. 9; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Water-Miscible Quinone Flow Battery with High Volumetric Capacity and Energy Density
Highly Stable, Low Redox Potential Quinone for Aqueous Flow Batteries**
Journal Article
·
Tue May 21 20:00:00 EDT 2019
· ACS Energy Letters
·
OSTI ID:1597276
Highly Stable, Low Redox Potential Quinone for Aqueous Flow Batteries**
Journal Article
·
Wed Feb 23 19:00:00 EST 2022
· Batteries & Supercaps
·
OSTI ID:1846349