INFLUENCE OF METAL SUBSTITUTE ON ELECTROCHEMICAL AND SORPTION CHARACTERISTICS OF LaNi5 BASED ALLOYS

  • L. G. Shcherbakova
  • Yu. M. Solonin
  • Ye. N. Severyanina
Conference paper
Part of the NATO Science for Peace and Security Series C: Environmental Security book series (NAPSC)

Abstract

A systematic investigation of the substituting components' influence on kinetic, sorption characteristics and the equilibrium hydrides formation potential in the LaNi5 system alloys in alkaline electrolyte has been conducted. It was ascertained that increasing a substituting component radius and thus growth of an elementary cell volume results in increasing enthalpy of hydrides formation and anode shift of hydrides formation equilibrium potential. This shift increases with substituting component amount increasing. It was shown that the dependence between value of the hydrides formation enthalpy and hydrides formation (decomposition) equilibrium potential is linear. Inserting ??, Mn, Al into LaNi5 leads to the growth of surface catalytic activity relative to hydrogen exchange reaction. In consequence of this the absorption of hydrogen by the alloy become easier that allows to receive on no activated electrodes high discharge capacity (280–320 mA.h/g) even at the initial charge/discharge cycles

Keywords

photoelectrochemical cell hydrides kinetics equilibrium potential 

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References

  1. 1.
    1. Sakai T., Oguro R., Miyambra H., J. Less-Common Met., 1990; 161(2): 193–202CrossRefGoogle Scholar
  2. 2.
    2. Willems J.Buschow K.H., J. Less-Common Met., 1987; 129(1): 13–30CrossRefGoogle Scholar
  3. 3.
    3. Meli F., Schlapbach L., J. Less-Common Met., 1991; 172–174(1–2): 1252–1259CrossRefGoogle Scholar
  4. 4.
    4. Sacai T., Hasama T., Miyamura H., J. Less-Common Met., 1991; 171–174: 1175–1184CrossRefGoogle Scholar
  5. 5.
    5. Shcherbakova L.G., Dan'ko D.B., V.B. Muratov V.B., Solonin Yu.M., Kolbasov G.Ya., Rusetskii I.A. Metal hydride use for solar energy accumulation. In: Hydrogen Materials Science and Chemistry of Metal Hydrides, NATO Science Series, Netherlands, Springer, 2007, p. 699–706Google Scholar
  6. 6.
    6. Kolachev B.A., Shalin A.A., Ilyin R.E. Alloys. Hydrogen Accumulators (Moscow: Metallurgy, 1991), p. 352 (in Russian)Google Scholar

Copyright information

© Springer Science + Business Media B.V. 2008

Authors and Affiliations

  • L. G. Shcherbakova
    • 1
  • Yu. M. Solonin
    • 1
  • Ye. N. Severyanina
    • 1
  1. 1.Frantsevich Institute for Problems of Material Sciences of NASUKievUkraine

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