Redox flow batteries offer a compelling engineering framework to deliver low-cost, long-duration electricity storage because power and energy components of the battery can be scaled independently. Despite their advantages, flow battery systems commercialized to date have failed to realize this low-cost potential, primarily owing to shortcomings associated with the battery chemistry (e.g. the cost of vanadium raw materials in the vanadium redox flow battery). This talk describes the design and demonstration of new redox flow battery electrolyte materials based on earth-abundant coordination complexes that result in two of the highest aqueous redox flow batteries ever reported. The batteries operate at over 1.6 and 2.1 volts and cycle with nearly quantitative current efficiency by using chelating ligands to shut down water splitting reactions at the molecular level.

High voltage redox flow batteries: Shattering the kinetic stability window of aqueous electrolyte

2019 Fall National Meeting

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