Probing the Air Storage Failure Mechanism of Ni-Rich Layered Cathode Materials
| العنوان: | Probing the Air Storage Failure Mechanism of Ni-Rich Layered Cathode Materials |
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| المؤلفون: | Qingyu Dong, Ruowei Yi, Jizhen Qi, Yanbin Shen, Liwei Chen |
| المصدر: | Chinese Physics Letters. 39:038201 |
| بيانات النشر: | IOP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | General Physics and Astronomy |
| الوصف: | Ni-rich layered oxide cathode materials, such as LiNi0.83Co0.12Mn0.05O2 (NCM811), exhibit high specific capacity and low cost, and become cathode material preference of high-energy-density Li-ion batteries. However, these cathode materials are not stable and will form Li-poor reconstructed layers and alkaline compounds (Li2CO3, LiOH) on the surface during the storage and processing in humid air, resulting in serious deterioration of electrochemical properties. During the past two decades, the consensus on the surface instability mechanism during humid air storage has not been reached. The main controversy focuses on the unstable octahedron mechanism and the Li/H exchange mechanism. Herein, we investigate the instability mechanism in the humid air by conducting scanning electronic microscopy, scanning transmission electron microscopy, and x-ray photoelectron spectroscopy analysis on NCM811 samples stored in designed atmospheres, etc., and realize that the surface instability of the NCM811 during storage should be mainly originated from Li/H exchange when it contacts with moisture. |
| تدمد: | 1741-3540 0256-307X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::3b8312be2b8a8504d638667fdaf03d16Test https://doi.org/10.1088/0256-307x/39/3/038201Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........3b8312be2b8a8504d638667fdaf03d16 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17413540 0256307X |
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