Studies of the Electrochemical Behavior of LiNi0.80Co0.15Al0.05O2 Electrodes Coated with LiAlO2
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...
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Veröffentlicht in: | Journal of the Electrochemical Society 2017-01, Vol.164 (13), p.A3266-A3275 |
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Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 1945-7111 |
DOI: | 10.1149/2.1631713jes |