Improvement of the electrochemical performance of LiFePO4 cathode by Y-doping

LiFe1−xYxPO4 doped (d-LFP) with amounts of yttrium (0.01% < x < 5% w/w) show a remarkable effect on the electrochemical behavior. The d-LPF samples were investigated on the Li extraction/insertion performance through charge/discharge and capacity–voltage curves. The best performance was attain...

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Bibliographic Details
Published in:MRS communications 2017-09, Vol.7 (3), p.515-522
Main Authors: Herrera, F., Fuenzalida, F., Marquez, P., Gautier, J. L.
Format: Article
Language:English
Subjects:
Batteries
Biomaterials
Characterization and Evaluation of Materials
Doping
Electrochemical analysis
Electrodes
Electron microscopy
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Lithium
Materials Engineering
Materials Science
Nanoparticles
Nanotechnology
Polymer Sciences
Prospective Article
Prospective Articles
X-ray diffraction
Yttrium
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Summary:LiFe1−xYxPO4 doped (d-LFP) with amounts of yttrium (0.01% < x < 5% w/w) show a remarkable effect on the electrochemical behavior. The d-LPF samples were investigated on the Li extraction/insertion performance through charge/discharge and capacity–voltage curves. The best performance was attained with Y content of x = 1%. The materials were synthesized by a hydrothermal method and characterized by x-ray diffraction (XRD) and scanning electron microscopy–energy dispersive x-ray spectroscopy (SEM–EDX). The XRD studies showed that d-LPF had the same monoclinic structure as the undoped material. The achieved electrode performance has been attributed to the addition of Y3+ ion by stabilizing the orthorhomic structure. The electrode resistance decreases through the Y-doping.
ISSN:2159-6859
2159-6867
DOI:10.1557/mrc.2017.71