University of Southern California

Advaith Murali

Sri R Narayan

Bo Yang

Robert Aniszfeld

Lena Hoober-Burkhardt

Sankarganesh Krishnamoorthy

Archith Nirmalchandar

G K Surya Prakash

Surya G Prakash

An organic flow battery having a positive electrode electrolyte containing organic compounds with extended conjugation and/or cyclic side chains is provided. The flow battery includes a positive electrode and a positive electrode electrolyte including first solvent and a first redox couple. The positive electrode electrolyte flows over and contacting the positive electrode. The first redox couple includes a first organic compound and a reduction product of the first organic compound. The flow battery also includes a negative electrode and a negative electrode electrolyte including a second solvent and a second redox couple. The negative electrode electrolyte flows g over and contacts the positive electrode. Typically, an ion exchange membrane is interposed between the positive electrode and the negative electrode Characteristically, the first organic compound resists crossover through the ion exchange membrane.

Crossover resistant materials for aqueous organic redox flow batteries

A quinone derivative with a high redox potential that does not undergo Michael addition or proto-desulfonation. This molecule addresses the key issues faced with the positive side material of an aqueous all-organic flow battery. This new molecule is 2,5-dihydroxy-4,6-dimethylbenzene-1,3-disulfonic acid (or the disulfonate salt thereof). This quinone derivative offers good solubility, electrochemical reversibility, and robustness to charge/discharge cycling. Quinones with reduced crossover are also provided.

Stable positive side material for all-organic flow battery

Quinones and related compounds for use in flow batteries are provided. Many of these compounds are found to mitigate the effects of crossover in a flow battery. Other structure for improving battery performance is provided.

Materials for high-performance aqueous organic redox flow batteries

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Advaith Murali