Preparation and electrochemical performance of AgxLi1−xV3O8

We report here the preparation of Ag-doped LiV3O8 for use as a cathode material in rechargeable lithium ion batteries. Synthesis was carried out by sol–gel methods and low temperature calcination using V2O5 wet gel, LiOH·H2O, and AgNO3 as raw materials. The product was characterized by X-ray diffraction (XRD), and its electrochemical behavior as a cathode material was studied by galvanostatic charge–discharge, cyclic voltammetry, and ac impedance techniques. The experimental results show that Ag-doped LiV3O8 cathodes have greater initial discharge capacity than undoped cathode. And those Ag-doped LiV3O8 electrodes, especially Ag0.04Li0.96V3O8, show the best long-life cycling performance. All of the doped powders show better stability at the 2.6 V plateau efficiency, due to their more stable cell impedance.