Effect of sintering temperature on electrochemical performance of LiFe0·4Mn0·6PO4/C cathode materials
Data(s) |
01/07/2014
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Resumo |
Carbon coated LiFe0·4Mn0·6PO4 (LiFe0·4Mn0·6PO4/C) was synthesised using high energy ball milling and annealing processes. The starting materials of Li2C2O4, FeC2O4.2H2O, MnC2O4.2H2O, NH4H2PO4 were firstly milled for 40 h, and followed by further milling for 5 h after adding glucose solution. The milled sample was heated at different temperatures (550, 600, 650 and 700°C) for 10 h to produce LiFe0·4Mn0·6PO4/C composites. The structure and morphology of the samples were investigated using X-ray diffraction, field emission scanning electron microscopy, and high resolution electron microscopy. The phase of samples annealed at 550 and 600°C mainly consists of olivine type LiFePO4, but a small amount of Fe2P impurity phase is formed in the samples annealed at 650 and 700°C. Electrochemical analysis results show that LiFe0·4Mn0·6PO4/C synthesised at 600°C exhibits the best performance with the initial discharge capacity of 128 mAh g-1 at 0·1 C, and 109 mAh g-1 at 1 C after 500 cycles. The LiFe0·4Mn0·6PO4/C exhibits excellent electrochemical properties for high energy density lithium ion batteries. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Maney Publishing |
Relação |
http://dro.deakin.edu.au/eserv/DU:30070433/huang-effectof-2014.pdf http://www.dx.doi.org/10.1179/1432891714Z.000000000664 |
Direitos |
2014, Maney Publishing |
Palavras-Chave | #Cyclic voltammetry #Electrochemical properties #LiFe0·4Mn0·6PO4/C #Lithium ion battery #Sintering temperature #Science & Technology #Technology #Materials Science, Multidisciplinary #Materials Science #LiFe0.4Mn0.6PO4/C #LITHIUM-ION BATTERIES #PHOSPHO-OLIVINES #LIFEPO4 #LIMNPO4 #MECHANISM |
Tipo |
Journal Article |