Electrochemical and magnetic characterization of LiFePO4 and Li0.95Mg0.05FePO4 cathode materials |
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| Authors: | J. Yao K. Konstantinov G. X. Wang H. K. Liu |
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| Affiliation: | (1) Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia;(2) ARC Centre for Nanoelectromaterials, University of Wollongong, Wollongong, NSW 2522, Australia |
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| Abstract: | A series of lithium iron phosphates was synthesized via the sol–gel route. Iron phosphides, which are electronic conductors, were formed when sintered at 850°C. Magnetic susceptibility measurements on the samples show antiferromagnetic behaviour with T N=50±2 K for LiFePO4 and Li0.95Mg0.05PO4 sintered at temperatures below 850°C. The LiFePO4 and Li0.95Mg0.05FePO4 cathodes show a stable electrochemical capacity in the range of 150–160 mA h/g on cycling. The cyclability deteriorates with increasing sample sintering temperature due to the increased crystal size and impurities. |
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| Keywords: | Lithium iron phosphates Magnetic susceptibility Lithium-ion battery Electrochemical property |
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