The electronic properties of chemically delithiated Li_xFePO_4
Abstract
We report on the structure and the electronic features of LiFePO4 and the delithiated mixture (1-x)Li_1FePO_4 + x Li_0FePO_4 powder obtained by chemical delithiation. X-ray diffraction, Fourier transform infrared spectroscopy, and magnetic experiments are analyzed for x = 0.0, 0.5, and 1.0. The magnetic properties give evidence of a super-paramagnetism associated to iron-based ferromagnetic nanoparticles, superposed to the intrinsic magnetic contribution of LiFePO_4 which undergoes an antiferromagnetic ordering at T_N(x=1)=50 K and T_N(x=0)=125 K. Magnetization curves show superparamagnetism due to nanometer- sized magnetic particles. The magnetic clustering (amount of iron in the ferromagnetic nanoparticles, mean size distribution) is independent of the lithium concentration.
Additional Information
© 2006 ECS - The Electrochemical Society. We would like to thank M. Selmane for his assistance in XRD experiments. A.A.S.'s work is supported by a Ph.D. grant from the Morocco-French cooperation program under contract No. MA/03/71. US-DOE support through Basic Energy Sciences Grant DE-FG03-00ER15035 is acknowledged.Additional details
- Alternative title
- The electronic properties of chemically delithiated LixFePO4
- Eprint ID
- 89621
- Resolver ID
- CaltechAUTHORS:20180913-133203597
- MA/03/71
- Morocco-French cooperation program
- DE-FG03-00ER15035
- Department of Energy (DOE)
- Created
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2018-09-14Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field