Effect of calcination temperature on microstructure and electrochemical performance of lithium-rich layered oxide cathode materials

•A series of Li-rich layered oxide cathode materials (Li1.2Mn0.56Ni0.16Co0.08O2) were successfully synthesized via a two-step synthesis method.•The effects of calcination temperature on the cathode materials were researched in detail.•A well-crystallized layered structure was obtained as the calcina...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2016-11, Vol.213, p.123-130
Main Authors: Ma, Quanxin, Peng, Fangwei, Li, Ruhong, Yin, Shibo, Dai, Changsong
Format: Article
Language:English
Subjects:
Calcination
Cathodes
Chemical precipitation
Coprecipitation
Crystallization
Cycles
Discharge
Electrochemical analysis
Electrode materials
Lithium
Microstructure
Performance evaluation
Roasting
Structural stability
Synthesis
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Summary:•A series of Li-rich layered oxide cathode materials (Li1.2Mn0.56Ni0.16Co0.08O2) were successfully synthesized via a two-step synthesis method.•The effects of calcination temperature on the cathode materials were researched in detail.•A well-crystallized layered structure was obtained as the calcination temperature increased.•The samples calcined in a range of 850–900°C exhibited excellent electrochemical performance. Lithium-rich layered oxide cathode materials (Li1.2Mn0.56Ni0.16Co0.08O2 (LLMO)) were synthesized via a two-step synthesis method involving co-precipitation and high-temperature calcination. The effects of calcination temperature on the cathode materials were studied in detail. Structural and morphological characterizations revealed that a well-crystallized layered structure was obtained at a higher calcination temperature. Electrochemical performance evaluation revealed that a cathode material obtained at a calcination temperature of 850°C delivered a high initial discharge capacity of 266.8mAhg−1 at a 0.1C rate and a capacity retention rate of 95.8% after 100 cycles as well as excellent rate capability. Another sample calcinated at 900°C exhibited good cycling stability. It is concluded that the structural stability and electrochemical performance of Li-rich layered oxide cathode materials were strongly dependent on calcination temperatures. The results suggest that a calcination temperature in a range of 850–900°C could promote electrochemical performance of this type of cathode materials.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2016.04.010