Lithium Iron Phosphate Powders and Coatings Obtained by Means of Inductively Coupled Thermal Plasma
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- 作者：K. Major ; J. Veilleux ; G. Brisard
- 关键词：coatings ; inductively coupled thermal plasma ; LiFePO4 ; lithium ; ion battery ; nanopowders ; SPPS
- 刊名：Journal of Thermal Spray Technology
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：25
- 期：1-2
- 页码：357-364
- 全文大小：1,683 KB
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J. Veilleux (2)
G. Brisard (1)
1. Department of Chemistry, Université de Sherbrooke, 2500 Boul. de l’Université, Sherbrooke, QC, J1K 2R1, Canada
2. Department of Chemical Engineering and Biotechnological Engineering, Université de Sherbrooke, 2500 Boul. de l’Université, Sherbrooke, QC, J1K 2R1, Canada - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Surfaces and Interfaces and Thin Films
Tribology, Corrosion and Coatings
Materials Science
Characterization and Evaluation Materials
Operating Procedures and Materials Treatment
Analytical Chemistry - 出版者：Springer Boston
- ISSN：1544-1016
文摘
Lithium-ion batteries have high energy efficiency and good cycling life and are considered as one of the best energy storage device for hybrid and/or electrical vehicle. Still, several problems must be solved prior to a broad adoption by the automotive industry: energy density, safety, and costs. To enhance both energy density and safety, the current study aims at depositing binder-free cathode materials using inductively coupled thermal plasma. In a first step, lithium iron phosphate (LiFePO4) powders are synthesized in an inductively coupled thermal plasma reactor and dispersed in a conventional polyvinylidene fluoride (PVDF) binder. Then, binder-free LiFePO4 coatings are directly deposited onto nickel current collectors by solution precursor plasma spraying (SPPS). The morphology, microstructure, and composition of the synthesized LiFePO4 powders and coatings are fully characterized by electronic microscopy, x-ray diffraction, and x-ray photoelectron spectroscopy (XPS). Quantifying Li with XPS requires the substitution of iron with manganese in the SPPS precursors (LiMPO4, where M = Fe or Mn). The plasma-derived cathodes (with and without PVDF binder) are assembled in button cells and tested. Under optimized plasma conditions, cyclic voltammetry shows that the electrochemical reversibility of plasma-derived cathodes is improved over that of conventional sol-gel-derived LiFePO4 cathodes.