Developed at Harvard for large scale energy storage applications

Developed at Harvard for large scale energy storage applications

2,6-DPPEAQ, a Highly Stable Redox Active Material For Aqueous Flow Batteries

Strem recently introduced (((9,10-Dioxo-9,10-dihydroanthracene-2,6-diyl)bis(oxy))bis(propane-3,1-diyl))bis(phosphonic acid), 98%, 2,6-DPPEAQ,  Strem item# 15-8245. The compound is a highly stable redox-active phosphonate-functionalized anthraquinone used as a negative potential electrolyte for aqueous redox-flow batteries.


Figure 1: Strem Item # 15-8245

The generation of electrical energy by renewable wind and solar power has made great advances over the last few decades. In principle, the energy output from these sources could be large enough to replace conventional power plants based on coal, natural gas and nuclear energy. A major drawback of solar and wind power is its inherent intermittency (i.e. periods in which the sun and wind are absent). To bridge these periods, massive power storage devices capable of storing enough energy to power entire cities and industries for several hours or even days must be developed.

One promising avenue is the use of redox-flow batteries, in which redox-active materials on a multi-ton scale, store electrical energy when supply is abundant and release energy in a controlled manner when there is a shortage.

The working groups of Prof. Roy Gordon and Prof. Michael Aziz from Harvard University have developed the water-soluble dihydroxyanthraquinone derivative (2,6-DPPEAQ) as a suitable candidate to solve the problem of energy storage on a large scale. The compound exhibits unprecedented stability in comparison to other similarly performing organic electrolytes, and is the first of such materials to display stability suitable for large scale energy storage applications.


Figure 2: Laboratory performance testing over a 5-day cycling demonstrated a fade rate of only 0.011% per day and an electrochemical purity > 97.5%.

Recently, professors Gordon and Aziz were honored with the highly prestigious 2019 Eni Award for their contributions to the field of Energy storage.

The full article can be viewed here:

We have recently acquired a license from Harvard University to market this technology and are offering 2,6-DPPEAQ on R&D scales for our customers in the field of energy storage.



1. Adv. Energy Mater., 2019, 9(12), 1900039.

2. Joule, 2018, 2(9), 1894–1906.


Featured Product:
15-8245: (((9,10-Dioxo-9,10-dihydroanthracene-2,6-diyl)bis(oxy))bis(propane-3,1-diyl))bis(phosphonic acid), 98%, 2,6-DPPEAQ


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