Li3V2(PO4)3 as a cathode additive for the over-discharge protection of lithium ion batteries

Li3V2(PO4)(3) has been used as a cathode additive to make lithium ion batteries (LIBs) retain a good electrochemical performance under over-discharge conditions. Its lower discharge voltage plateau effectively prevents the corrosion of anode collector-copper foil during the over-discharge progress. When 7 wt% Li3V2(PO4)(3) is added to LiCoO2 through a "layer to layer" mode, the capacity retention ratio of the LIBs has raised from 49.55% to 95.91%.