Effective Storage of Electrons in Water by the Formation of Highly Reduced Polyoxometalate Clusters.

ABSTRACT: Aqueous solutions of polyoxometalates (POMs) have been shown to have potential as high-capacity energy storage materials due to their potential for multi-electron redox processes, yet the mechanism of reduction and practical limits are currently unknown. Herein, we explore the mechanism of multi-electron redox processes that allow the highly reduced POM clusters of the form {MO₃}_y to absorb y electrons in aqueous solution, focusing mechanistically on the Wells-Dawson structure X₆[P₂W₁₈O₆₂], which comprises 18 metal centers and can uptake up to 18 electrons reversibly (y = 18) per cluster in aqueous solution when the countercations are lithium. This unconventional redox activity is rationalized by

SUBMITTER: Chen JJ 

PROVIDER: S-EPMC9171825 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature