A lanthanide-based coordination polymer as lithium ion battery anode with high cyclic stability

Abstract

A lanthanide-based coordination polymer Tb2(H2dobdc)3(DMF)4 (Tb-MOF), was prepared by the solvothermal reaction. Benefitting from the large amount and uniform distribution of oxygen atom, conjugated aromatic nucleus as active electrochemical reaction sites, Tb-MOF anode exhibits good specific capacity and excellent cycle performance. The initial discharge specific capacity reached 627.5 mAh g−1 and –87.4% capacity retention after 100 cycles at a current density of 100 mA g−1. At the same time, Tb-MOF electrode has an extremely high structural stability, and the capacity retention is maintained at 99.1% even if it is cycled 3000 times at a current density of 0.8 Ag−1. The research results show that this novel rare earth complex electrode has important research value and application potential compared with traditional anode materials.