A uniform and skinny amorphous LiNbO3 coating was parceled on the 0.5Li2MnO3·0.5LiNi1/3Co1/3Mn1/3O2 (OLO) surface by liquid deposition method. The experimental outcomes confirmed LiNbO3 coating not only played the role of inert protective layer, but also played the role of rapid transport of Li+, which contributed to enhance the electrochemical performances of OLO. It is noteworthy that the initial discharge capacity of the sample (LNbO@OLO-10) with 1 wt% cladding (3–5 nm thickness) at 0.1C rate was 280.5 mAh g−1, while that of the pristine material (bare-OLO) was 255.4 mAh g−1. After 100 cycles at 0.5C rate, the capacity retention rate of LNbO@OLO-10 (82.05%) was higher than that of bare-OLO (72.45%). The discharge capacity of LNbO@OLO-10 was still 104.18 mAh g−1 at 5C rate, whereas bare-OLO was purely 70.34 mAh g−1.Graphical abstract: