ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(44), С. 60448 - 60457
Опубликована: Окт. 28, 2024
The commercial application of high-voltage LiCoO2 (LCO) faces significant challenges due to rapid capacity decay, primarily attributed an unstable interface and structure at deeply delithiated states. Herein, a unique rare earth oxide composite coating comprising La2O3, Y2O3, LaYO3 has been prepared stabilize LCO high voltage. synergistic effect between these oxides significantly reinforces the protective capabilities coating, effectively enhancing interfacial/structural stability LCO. When tested 4.6 V, coated exhibits excellent retention 94.4% after 300 cycles 1 C. Even ultralong charge/discharge test 700 2 C, retains 85.2% its initial specific capacity, which outperforms uncoated (6.3%). Moreover, shows enhanced cycling performance temperature 45 °C, owing outstanding thermal La–Y–O composite. Additionally, superior 4.7 compared LCO, demonstrated promising potential in improving electrochemical higher cutoff voltages. These findings highlight efficacious strategy enhance using oxides.
Язык: Английский