Development of facile, high-yielding synthetic routes to energy dense charge-carriers is critical for the success of non-aqueous redox flow battery technology. Amidst a rapidly growing library of potential electrolytes, including small organic molecules, metal coordination complexes, polymers, and nanoparticles, there is a conspicuous lack of exploration of transition metal cluster complexes. Polyoxovanadate-alkoxide (POV-alkoxide) clusters are particularly well suited to serve as a charge carriers, given the unique electrochemical and physical properties of these systems. The Linqvist polyoxoanion provides multiple metal centers for cooperative redox activity and the modular bridging ligands present opportunities to tune the auxiliary properties such as stability and solubility. Here, we present our progress in understanding structure-function relationships of POV-alkoxide clusters that dictate the optimal electrochemical properties for this multinuclear assembly. This work establishes the fundamental efficacy of the Linqvist clusters as adaptable charge carriers, serving as a foundation for future efforts to adapt metal-oxide clusters for applications in electrochemical energy storage.

Self-assembled, metal-oxide clusters as charge carriers for non-aqueous redox flow batteries

256th National Meeting (2018)

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