Topic
Polyoxometalate
About: Polyoxometalate is a research topic. Over the lifetime, 3493 publications have been published within this topic receiving 94123 citations. The topic is also known as: POM.
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TL;DR: In this article, the Anderson-type polyoxometalate was employed as a stable electrolyte additive during repeated Zn plating/striping to significantly suppress zinc dendrite growth.
Abstract: Even rechargeable aqueous Zn-ion batteries are regarded as one of the promising secondary batteries due to their high safety and low cost, but their practical applications are still hampered by the formation of zinc dendrites. Thus, in this work, we employ a classic Anderson-type polyoxometalate for the first time, (NH4)6[Mo7O24]·4H2O (NMO), as a stable electrolyte additive during repeated Zn plating/striping to significantly suppress zinc dendrite growth. The [Mo7O24]6− anion clusters can bind with massive Zn ions to produce a Zn-rich film, thus ensuring the uniform distribution of Zn ions on the surface of the Zn anode, while the NH4+ cation can further regulate the even Zn deposition during plating via electrostatic repulsion forces. As a result, the cycle life of Zn anodes in symmetric cells has improved approximately 100% in a wide range of current densities and the Zn/NaV3O8·1.5H2O (Zn/NVO) full cells also demonstrate high capacity retention and excellent fast charge/discharge capacity. The utilization of ultra-stable polyoxometalate additives with strong complexation with metal ions provides researchers with a new conception for constructing long-term cycling life aqueous rechargeable batteries.
33 citations
TL;DR: The structure and electrical properties of a single crystal in which mixed-valence polyoxometalates were electrically wired by cationic π-molecules of tetrathiafulvalene substituted with pyridinium are reported.
Abstract: In a mixed-valence polyoxometalate, electrons are usually delocalized within the cluster anion because of low level of inter-cluster interaction. Herein, we report the structure and electrical properties of a single crystal in which mixed-valence polyoxometalates were electrically wired by cationic π-molecules of tetrathiafulvalene substituted with pyridinium. Electron-transport characteristics are suggested to represent electron hopping through strong interactions between cluster and cationic π-molecules.
33 citations
33 citations
TL;DR: Three discrete cobalt-substituted silicotungstates have been synthesized using a synthetic approach involving Co(II) ions, the dilacunary [gamma-SiW10O36]8- polyanion and a bulky organic cation in basic media.
Abstract: Three discrete cobalt-substituted silicotungstates, [Co3(H2O)(B-beta-SiW9O34)(B-beta-SiW8O29(OH)2)]12- (1), [Co3(H2O)(B-alpha-SiW9O34)(B-beta-SiW8O31)]14- (2), and [Co9Cl2(OH)3(H2O)9(B-beta-SiW8O31)3]17- (3), have been synthesized using a synthetic approach involving Co(II) ions, the dilacunary [gamma-SiW10O36]8- polyanion and a bulky organic cation in basic media; all three compounds have been fully characterized and their position as structural intermediates in Co-containing silicotungstate chemistry is described.
33 citations
TL;DR: In this article, the authors showed that the redox environment of silver can be controlled with high definition by the heteropolyanion monolayer matrix, and they showed that a small amount of cesium (Ag:Cs=9:1) in the silver phosphomolybdate salt did not appreciably alter the packing in the ordered AgCs(9: 1)3PMo12O40 monolayers, but did produce a measurable shift of the NDR values to −0.68
33 citations