Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/1994
Título: Characterisation and performance studies of a LiFePO4 cathode material synthesized by microwave heating 
Autor: Plancha, Maria João
Paiva, T. I.
Rangel, C. M.
Palavras-chave: LiFePO4 cathode
Li-Ion batterie
Microwave heating
Charge-discharge cycles
Data: 2013
Citação: Plancha, M.J.; Paiva, T.I.; Rangel, C.M. Characterisation and performance studies of a LiFePO4 cathode material synthesized by microwave heating. In: HYCELTEC'2013 - IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries, Book of Abstracts, Estoril, 26-28 June, 2013
Resumo: Lithium iron phosphate with incorporated carbon, LiFePO4-C, was synthesized by the microwave-assisted method. X-ray diffraction analyses showed higher crystallization degrees for samples submitted to higher irradiation times. A particle-agglomerated morphology was associated as revealed by scanning electron microscopy. The electrochemical character-istics of a composite cathode containing the synthesized product were evaluated. The two-phase electrochemical process between FePO4 and LiFePO4 was evidenced in the cycling voltammogram profile and its reversibility and stability were demonstrated. An additional redox reversible reaction was revealed and assigned to another phosphate present in the synthesized product. The charge/discharge performance study indicated a good capacity retention after the initial cy-cles where capacity fading was associated to the resistance of a SEI film that forms and grows on the cathode’s surface. Results obtained by electrochemical impedance analysis before and after cell’s cycling are discussed.
URI: http://hdl.handle.net/10400.9/1994
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