In this paper, we studied the influence of LiAlO2 coatings of 0.5, 1 and 2 nm thickness prepared by Atomic Layer Deposition onto LiNi0.8Co0.15Al0.05O2 electrodes, on their electrochemical behavior at 30 and 60°C. It was demonstrated that upon cycling, 2 nm LiAlO2 coated electrodes displayed ∼3 times lower capacity fading and lower voltage hysteresis comparing to bare electrodes. We established a correlation among the thickness of the LiAlO2 coating and parameters of the self-discharge processes at 30 and 60°C. Significant results on the elevated temperature cycling and aging of bare and LiAlO2 coated electrodes at 4.3 V were obtained and analyzed for the first time. By analyzing of X-ray diffraction patterns of bare and 2 nm coated LiNi0.8Co0.15Al0.05O2 electrodes after cycling, we concluded that cycled materials preserved their original structure described by R-3m space group and no additional phases were detected.
|Journal||Journal of the Electrochemical Society|
|State||Published - 2017|
Bibliographical noteFunding Information:
Finnish Centre of Excellence in Atomic Layer Deposition (Academy of Finland) is acknowledged for funding. O.S-L. and B.M. thank Dr. H. Yamin for his interest in this work.
© The Author(s) 2017. Published by ECS. All rights reserved.