Polymer-assisted synthesis of LiNi2/3Mn1/3O2 cathode material with enhanced electrochemical performance

► LiNi2/3Mn1/3O2 cathode material is prepared with PEG400 as the sacrificial template. ► Optimization of synthesis condition. ► Higher Li/Ni cationic ordering and crystallinity are obtained. ► High capacity, stable cycle performance and excellent rate capability are obtained.