3D Porous Metal–Organic Skeleton Based on Polyoxometalate Nanoclusters as an Anode in a Lithium-Ion Battery

Abstract

Basket-like polyoxometalate (POM) nanoclusters possess bulky space barriers and limited coordination active sites; therefore, it is difficult for them to bond with functional metal− organic building units to construct porous materials. To overcome this bottleneck, we adopt a dual-ligand strategy to anchor basketlike POM nanoclusters onto a Ag-pz metal−organic chain yielding a polyporous hybrid material, (H 4 btb)[{Ag 4 (H 2 O)(pz) 5 Cl}-{H 2 SrP 6 Mo 18 O 73 }]•4H 2 O (BAS-MOF-1). It is the first threedimensional (3D) net with intersecting tunnels based on a unique double-layer structure composed of {P 6 Mo 18 O 73 } nodes and Ag-pz chains. As an anode for a Li-ion battery (LIB), this material shows higher lithiation capacity, stability, and rate than zero-dimensional (0D) control compounds, which can be ascribed to the superior redox ability of basket-like POMs and stable organic−inorganic porous structures.

Recent research progress on polyoxometalate-based electrocatalysts in energy generation

“…91 Self-assembly involves the synergistic interaction of various driving forces, such as electrostatic interactions, hydrogen bonding, coordination bonding, solvent–solute interactions and other non-covalent interactions. 92–94 Factors such as the charge state, composition, and molecular structure of POM clusters, as well as the cationic effects of organic ligands, play crucial roles in the design and customization of POM-based nanostructures. Thus, it is necessary to carefully consider these factors to realize the required features and functions.…”