Preparation and Electrochemical Properties of LiNi2/3Co1/6Mn1/6O2 Cathode Material for Lithium-Ion Batteries

The cathode material LiNi2/3Co1/6Mn1/6O2 with excellent electrochemical performance was prepared successfully by a rheological phase method. The materials obtained were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectroscopy and charge-discharge tests...

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Bibliographic Details
Published in:Materials 2021-04, Vol.14 (7), p.1766
Main Authors: Zhu, Meijie, Li, Jiangang, Liu, Zhibei, Wang, Li, Kang, Yuqiong, Dang, Zhaohan, Yan, Jiasen, He, Xiangming
Format: Article
Language:English
Subjects:
Cathodes
Crystal defects
Crystallization
Electric vehicles
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode materials
Lithium
Lithium-ion batteries
Microscopy
Morphology
Particle size
Point defects
Rechargeable batteries
Rheological properties
Rheology
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Summary:The cathode material LiNi2/3Co1/6Mn1/6O2 with excellent electrochemical performance was prepared successfully by a rheological phase method. The materials obtained were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectroscopy and charge-discharge tests. The results showed that both calcination temperatures and atmosphere are very important factors affecting the structure and electrochemical performance of LiNi2/3Co1/6Mn1/6O2 material. The sample calcinated at 800 °C under O2 atmosphere displayed well-crystallized particle morphology, a highly ordered layered structure with low defects, and excellent electrochemical performance. In the voltage range of 2.8–4.3 V, it delivered capacity of 188.9 mAh g−1 at 0.2 C and 130.4 mAh g−1 at 5 C, respectively. The capacity retention also reached 93.9% after 50 cycles at 0.5 C. All the results suggest that LiNi2/3Co1/6Mn1/6O2 is a promising cathode material for lithium-ion batteries.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14071766