Surface Heterostructure Induced by PrPO4 Modification in Li1.2[Mn0.54Ni0.13Co0.13]O2 Cathode Material for High-Performance Lithium-Ion Batteries with Mitigating Voltage Decay

摘要: Lithium-rich layered oxides (LLOs) have been attractive cathode materials for lithium-ion batteries because of their high reversible capacity. However, they suffer from low initial Coulombic efficiency and capacity/voltage decay upon cycling. Herein, facile surface modification Li1.2Mn0.54Ni0.13Co0.13O2 material is designed to overcome these defects by the protective effect a heterostructure composed an induced spinel layer PrPO4 layer. As anticipated, sample modified with 3 wt % (PrP3) shows enhanced 90% compared 81.8% pristine one, more excellent cycling stability capacity retention 89.3% after 100 cycles only 71.7% less average discharge voltage fading 0.6353 0.2881 V. These results can be attributed fact that nanolayers moved amounts oxygen lithium lattice in bulk crystal structure, leading chemic...