A new polyoxometalate-resorcin[4]arene-based framework as an efficient anode material for lithium-ion batteries

The development of new and efficient anode materials for lithium-ion batteries (LIBs) has attracted considerable attention. Herein, a new polyoxometalate-based metal-organic framework (POMOF), [Mn 4 (L)(SiW 12 O 40 )·(DMF) 2 ·(H 2 O) 6 ]·4OH·4DMF·7H 2 O ( 1 ), was prepared with a resorcin [4]arene-based ligand (L), Keggin-type [SiW 12 O 40 ] 4- anion and Mn(II) cation (DMF =  N,N′ -dimethylformamide). Compound 1 has a layer structure sandwiched by [SiW 12 O 40 ] 4- anions. The high specific capacity and excellent cycling stability are achieved by using 1 as an anode material for LIBs. The high electrochemical performance of compound 1 is attributed to the good electron storage and reversible multi-electron redox properties of [SiW 12 O 40 ] 4- anions within the framework.