Lithium-active molybdenum trioxide coated LiNi sub(0.5)Co sub(0.2)Mn sub(0.3)O sub(2) cathode material with enhanced electrochemical properties for lithium-ion batteries

LiNi sub(0.5)Co sub(0.2)Mn sub(0.3)O sub(2) cathode material was coated with MoO sub(3) via a wet coating process. X-ray diffraction patterns show that the coating surface is composed of MoO sub(3) and Li sub(2)MoO sub(4). The 3 wt.% MoO sub(3) coated LiNi sub(0.5)Co sub(0.2)Mn sub(0.3)O sub(2) cath...

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Bibliographic Details
Published in:Journal of power sources 2014-12, Vol.269, p.747-754
Main Authors: Wu, Feng, Tian, Jun, Su, Yuefeng, Guan, Yibiao, Jin, Yi, Wang, Zhao, He, Tao, Bao, Liying, Chen, Shi
Format: Article
Language:English
Subjects:
Cathodes
Cathodic coating (process)
Coating
Electrochemical analysis
Electrolytes
Equivalence
Lithium-ion batteries
Molybdenum trioxide
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Summary:LiNi sub(0.5)Co sub(0.2)Mn sub(0.3)O sub(2) cathode material was coated with MoO sub(3) via a wet coating process. X-ray diffraction patterns show that the coating surface is composed of MoO sub(3) and Li sub(2)MoO sub(4). The 3 wt.% MoO sub(3) coated LiNi sub(0.5)Co sub(0.2)Mn sub(0.3)O sub(2) cathode (Li sub(2)MoO sub(4) is treated as equivalent mole of MoO sub(3)) exhibits the best improved cycling performance. It performs a capacity retention of 90.9% after 100 cycles while that of the pristine material is only 82.8%. After being coated by 3 wt.% MoO sub(3), the rate performance is also greatly enhanced and the charge transfer resistance is greatly decreased. The improvement of electrochemical performance is related to the fact that the coating layer diminishes the side reactions between the cathode and the electrolyte.
ISSN:0378-7753
DOI:10.1016/j.jpowsour.2014.07.057