Solid-state-stabilization of molecular vanadium oxides for reversible electrochemical charge storage

Abstract

The solid-state stabilization of a molecular vanadium oxide cluster using molecular crystal engineering is reported together with its performance in electrochemical energy storage.

Redox-inactive ions control the redox-activity of molecular vanadium oxides

“…[23][24][25] Systematic studies have provided critical insights into the effects of heterometalfunctionalization, 22,26,27 organofunctionalization 28 and countercation interactions 29,30 on the electrochemical properties of POVs. This fundamental understanding also enabled POV application in water oxidation catalysis, 31,32 redox-ow batteries, 33 and lithium ion batteries, [34][35][36] and as model catalyst surfaces. 37 In earlier work, we have targeted the development of a class of model vanadates in which systematic variation of the heterometal enables insights into tuning possibilities of the vanadate redox-chemistry: using a so-called placeholdercation approach, 23 we were able to gain access to a family of transition-metal-functionalized dodecavanadate clusters, (H 2 NMe 2 ) 2 [V 12 O 32 Cl] 3À (¼{V 12 }), 23 where two metal binding sites (Fig.…”

Sodium ion intercalation and multi redox behavior of a Keggin type polyoxometalate during [PMo10V2O40]5−to [PMo10V2O40]27−as a cathode material for Na-ion rechargeable batteries

“…42,43 Another strong reason for the major capacity fading is the dissolution of the POM cluster which is also reported in other POM based electrode materials. 44 The Na-POM shows higher specic discharge capacity when compared to the H-POM. The reason behind this fact is that the more dispersive nature of Na + ions results in the feasible movement of the large Na + ions intercalated within the intercluster regions.…”

Host‐Guest Complexation Between Cyclodextrins and Hybrid Hexavanadates: What are the Driving Forces?

“…[21][22][23][24][25][26][27][28] Recent progresses in polyoxovanadates (POVs) chemistry demonstrate their potential interest for energy-related applications including small molecules activation, redox-flow or Liand Na-ion batteries. [29][30][31][32][33] Thank to their striking redox properties, POVs have been identified as appealing components for designing advanced materials such as resistive switching devices. [34,35] POVs are also recognized for their relevant biological effects, as illustrated by numerous investigations about their interactions with enzymes, proteins or biological cells.…”