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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

The Electrochemical Behavior of LiFePO4/C Cathode Materials Doped with Antimony

1
Department of Chemical and Materials Engineering, National Central University, Chung-Li, Taiwan 32054, R.O.C
2
Department of Chemistry, National Central University, Chung-Li, Taiwan 32054, R.O.C
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2010, 4(2), 427-436; https://doi.org/10.3390/wevj4020427
Published: 25 June 2010
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Abstract

LiFePO4 is considered as a practical cathode material because of low raw materials’ cost, excellent thermal safety, environmental friendliness, and long operational life, despite obstacles such as low tap density, low electric conductivity and slow lithium-ion diffusion. To overcome these problems, we used an antimonyion doping method to synthesize LiFePO4/C with sebacic acid as a carbon source by a high-temperature solid-state reaction method. The effects of antimony concentration, sebacic acid content, calcination temperature, and calcination time on cell performance were investigated. After Sb3+ doping, LiFePO4 was converted to a p-type semiconductor and demonstrated greater electric conductivity of about 10-3 S cm-1. The 1.0 mol.% Sb-doped LiFePO4/C synthesized with 36 wt.% sebacic acid delivered an initial discharge capacity of 154 mAh g-1 at a 0.2 C-rate between 4.0-2.8 V. The doped cathode materials were further characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), and high-resolution transmission electron microscope (TEM) techniques for structural analysis and confirmation.
Keywords: LiFePO4; antimony doping; sebacic acid; high-temperature solid-state method; Li-ion batteries LiFePO4; antimony doping; sebacic acid; high-temperature solid-state method; Li-ion batteries
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fey, G.-K.; Peng, P.-Y.; Huang, K.-P.; Lin, Y.-C.; Cho, Y.-D.; Kao, H.-M. The Electrochemical Behavior of LiFePO4/C Cathode Materials Doped with Antimony. World Electr. Veh. J. 2010, 4, 427-436.

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