Synthesis of cobalt-based layered coordination polymer nanosheets and their application in lithium-ion batteries as anode materials

摘要

Cobalt-based layered coordination polymer ([Co(tfbdc)(4,4'-bpy)(H2O)(2)] Co-LCP) nanosheets have been synthesized by a solvothermal method (H(2)tfbdc = tetrafluoroterephthalic acid, 4,4'-bpy = 4,4'-bipyridine). Powder X-ray diffraction, elemental analysis, IR spectra, thermogravimetric analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the Brunauer-Emmett-Teller (BET) surface measurements were used to characterize the material. As an anode material for lithium-ion batteries, the Co-LCP nanosheets electrode exhibits higher reversible capacity and excellent cyclic stability, retaining 545 mA h g(-1) after 50 cycles at a current density of 50 mA g(-1).