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Synthesis of LiNixFe1?xPO4 solid solution as cathode materials for lithium ion batteries

Author:
Qing, Rui   Yang, Ming-Che   Meng, Ying Shirley   Sigmund, Wolfgang  


Journal:
Electrochimica Acta


Issue Date:
2013


Abstract(summary):

Nanosize LiNixFe1-xPO4 solid solution and LiNixFe1-xPO4/C nanocomposites were prepared via a solid state reaction method under argon atmosphere. A single phase olivine-type structure with Pnma space group was determined by X-ray diffraction. Crystallite sizes were found to be around 50 nm. A linear relationship was observed between lattice parameters and chemical composition which follows Vegard's law. Synthesized materials displayed electronic conductivity similar to previous reported values of LiFePO4. Carbon coating further increased the overall conductivity of nanocomposites to the order of 10(-3) S/cm. Chemical delithiation via NO2BF4 oxidant extracted more than 95% of lithium from the solid solution material accompanied by a decrease in lattice parameters. (C) 2013 Elsevier Ltd. All rights reserved.


Page:
827-832


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