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Díaz, V.; Humana, R.; Teliz, E.; Ruiz, F.; Castro, E.; Faccio, R.; Zinola, F. "New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys" (2015) International Journal of Hydrogen Energy. 40(20):6639-6646
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Abstract:

During the present investigation, it was observed that the inclusion of molybdenum in LaNi3.6Co0.7Mn(0.4-x)Al0.3Mox AB5-type alloys produced new responses in the electrochemical impedance spectroscopy (EIS) when they are used as an anode active material for Ni-MH batteries. The aim of this work is to study, using electrochemical impedance spectroscopy, the influence of molybdenum, on the performance of the electrode. EIS spectra were adjusted in terms of a physicochemical model of the dynamic response of the system. X ray diffraction and hydrogen diffusion coefficient calculated from discharges curves supported EIS model outcomes. The replacement of manganese by molybdenum, in a 2% w/w concentration level (AB5M1), has a positive effect for applications as energy storage material. In this sense, this alloy exhibits the lowest value of charge transfer resistance obtained from the analysis of impedance spectra. Moreover, changes in the (i0. aa) parameter, that is, the exchange current density and active area, respectively display a maximum value. The larger grade of fracture observed in AB5M1 can be due to the higher material's fragility as a consequence of molybdenum incorporation. XRD analysis on the three alloys confirms this hypothesis as shown in the paper. Copyright © 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys
Autor:Díaz, V.; Humana, R.; Teliz, E.; Ruiz, F.; Castro, E.; Faccio, R.; Zinola, F.
Filiación:Universidad de la República, Facultad de Ingeniería, Instituto de Ingeniería Química, J.Herrera y Reissig 565, Montevideo, Uruguay
Universidad Nacional de la Plata, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, CCT La Plata-CONICET, CC 16, Suc. 4, La Plata, Argentina
Universidad Nacional de Catamarca, Facultad de Ciencias Exactas y Naturales, Av. Belgrano N 300, Catamarca, Argentina
Universidad de la República, Facultad de Ciencias, Laboratorio de Electroquímica Fundamental, Igua 4225, Montevideo, Uruguay
Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Av. Rivadavia 1917, Ciudad de Buenos Aires, Argentina
Centro Atómico Bariloche, Comisión Nacional de Energía Atómica (CAB-CNEA), Av. Bustillo 9500, S.C. de Bariloche, RN, Argentina
Universidad de la República, Crystallography, Solid State and Materials Laboratory (Cryssmat-Lab), Facultad de Química, Montevideo, Uruguay
Palabras clave:Batteries; Diffraction patterns; Hydrogen; Metal hydrides; Molybdenum; Alloys; Charge transfer; Diffraction patterns; Diffusion; Dynamic response; Electric discharges; Electrodes; Hydrides; Hydrogen; Hydrogen storage; Manganese; Molybdenum; Nickel metal hydride batteries; Solar cells; Spectroscopy; Spectrum analysis; X ray diffraction; Anode active materials; Charge transfer resistance; Concentration levels; Exchange current densities; Hydrogen diffusion coefficients; Impedance spectrum; Metal hydrides; Physicochemical model; Electrochemical impedance spectroscopy
Año:2015
Volumen:40
Número:20
Página de inicio:6639
Página de fin:6646
DOI: http://dx.doi.org/10.1016/j.ijhydene.2015.03.112
Título revista:International Journal of Hydrogen Energy
Título revista abreviado:Int J Hydrogen Energy
ISSN:03603199
CODEN:IJHED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03603199_v40_n20_p6639_Diaz

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Citas:

---------- APA ----------
Díaz, V., Humana, R., Teliz, E., Ruiz, F., Castro, E., Faccio, R. & Zinola, F. (2015) . New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys. International Journal of Hydrogen Energy, 40(20), 6639-6646.
http://dx.doi.org/10.1016/j.ijhydene.2015.03.112
---------- CHICAGO ----------
Díaz, V., Humana, R., Teliz, E., Ruiz, F., Castro, E., Faccio, R., et al. "New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys" . International Journal of Hydrogen Energy 40, no. 20 (2015) : 6639-6646.
http://dx.doi.org/10.1016/j.ijhydene.2015.03.112
---------- MLA ----------
Díaz, V., Humana, R., Teliz, E., Ruiz, F., Castro, E., Faccio, R., et al. "New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys" . International Journal of Hydrogen Energy, vol. 40, no. 20, 2015, pp. 6639-6646.
http://dx.doi.org/10.1016/j.ijhydene.2015.03.112
---------- VANCOUVER ----------
Díaz, V., Humana, R., Teliz, E., Ruiz, F., Castro, E., Faccio, R., et al. New response in electrochemical impedance spectroscopy due to the presence of molybdenum on AB5-type alloys. Int J Hydrogen Energy. 2015;40(20):6639-6646.
http://dx.doi.org/10.1016/j.ijhydene.2015.03.112