Enhanced Interfacial Kinetics and High Rate Performance of LiCoO₂ Thin-Film Electrodes by Al Doping and In Situ Al₂O₃ Coating.

ABSTRACT: The structure and surface-interface instability of LiCoO₂ thin-film electrodes during charge-discharge cycles are one of the main factors leading to the deterioration of electrochemical performance. Element doping and surface coating are effective strategies to tackle this issue. In this work, Al-doped and in situ Al₂O₃-coated LiCoO₂ composite thin-film electrodes are prepared by magnetron sputtering. The results show that the resultant composite thin-film electrodes exhibited excellent cycling stability, with a discharge specific capacity of 40.2 μAh um^-1 cm^-2 after 240 cycles at 2.5 μA cm^-2, with a capacity retention rate of 94.14%, compared to a discharge capacity of the unmodified sample of only 37.7 μAh um

SUBMITTER: Xiao B 

PROVIDER: S-EPMC9453800 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature