Enhanced electrochemical performance of Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries co-modified by lanthanum and aluminum

As one of the most promising for the next-generation cathode material, the lithium-rich cathode is mainly suffering from severe capacity fading and voltage drop. Herein, the Li1.2Mn0.54Ni0.13Co0.13O2 cathode material co-modified by lanthanum and aluminum, i.e., 3LaAlO3:Al2O3, has been successfully achieved by sol-gel method. The Li1.2Mn0.54Ni0.13Co0.13O2 cathode with 3 wt% of 3LaAlO3:Al2O3 (LR-NMC@0.03) delivers an initial discharge capacity of 242.3 mAh g−1 at 1.0C with a corresponding capacity retention of 91.7% after 200 cycles, far higher than those (217.7 mAh g−1 and 72.8%) of the pristine sample. What is more important is that the capacity retention can increase from 42.9 to 83.5% even at 5.0C after 200 cycles. Specially, the voltage drop has been relieved by the 3LaAlO3:Al2O3 coating layer. The 3LaAlO3:Al2O3 applied in Li-rich cathode material has been demonstrated to be a feasible surface modification method to construct high-energy and high-power Li-ion batteries.