Preparation and Characterization of Ag/Ti2Nb10O29 Composite Microspheres Anode Materials for Lithium-Ion Batteries

摘要

Silver-coated Ti2Nb10O29 composite microspheres were successfully prepared by a solvothermal method with a subsequent post-annealing treatment. Effect of the coating Ag nanoparticles on the electrochemical properties was extensively studied. The XRD pattern shows that high purity Ti(2)Nb(10)O(29 )was formed and no impurity phases are observed. Moreover, SEM, XPS and EDX clearly revealed that Ag nanoparticles were combined on the surface area of formed Ti2Nb10O29 microspheres. The electrochemical performance of the Ag/Ti2Nb10O29 composite microspheres was characterized via cyclic voltammograms (CV) measurements. The CV curves indicate that the coating Ag nanoparticles minimize the polarization of pristine Ti2Nb10O29. The EIS indicates that the excellent rate capability of Ag/Ti2Nb10O29 composite microspheres can be ascribed to the improved electronic conductivity due to the incorporation of Ag nanoparticles.