Journal
POWDER TECHNOLOGY
Volume 237, Issue -, Pages 623-626Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2012.12.061
Keywords
Spherical LiNi0.8Co0.1Mn0.1O2; Fluorine substitution; Electrochemical performance; Lithium-ion batteries
Categories
Funding
- Major Special Project of Science and Technology of Hunan Province [2009FJ1002, 2011FJ1005]
- Fundamental Research Funds for the Central Universities [2010QZZD0101]
Ask authors/readers for more resources
Spherical LiNi0.8Co0.1Mn0.1O2 materials have been synthesized by hydroxide co-precipitation method. Layered oxyfluoride LiNi0.8Co0.1Mn0.1O2-zFz (0 <= z <= 0.06) cathodes have been synthesized by firing NH4F with LiNi0.8Co0.1Mn0.1O2 oxides at the relatively low temperature of 450 degrees C. The effect of fluorine content on the structure, morphology and electrochemical performance of the LiNi0.8Co0.1Mn0.1O2-zFz has been extensively studied. The results indicated that the initial discharge capacity slightly decreased with the increase in the content of fluorine substitution. However, cycling performance and rate capability were improved by the fluorine substitution. Capacity retentions after 100 cycles at room temperature were 79.7% for z = 0, 94.3% for z = 0.02, 91.5% for z = 0.04, and 86.9% for z = 0.06. In addition, after being stored at 90 degrees C for 5 h in a fully charged state, fluorine substituted LiNi0.8Co0.1Mn0.1O2 exhibited better cycling performance than pristine LiNi0.8Co0.1Mn0.1O2. Overall, fluorine substitution was an effective way to improve electrochemical performance. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available