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

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 basket-like POM nanoclusters onto a Ag-pz metal-organic chain yielding a polyporous hybrid material, (H(4)btb)[{Ag-4(H2O)(pz)(5)Cl}{H2SrP6Mo18O73}]<middle dot>4H(2)O (BAS-MOF-1). It is the first three-dimensional (3D) net with intersecting tunnels based on a unique double-layer structure composed of {P6Mo18O73} 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.