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Hydrogen sorption and electrochemical properties of intermetallic compounds La2MgNi9 and La1.9Mg1.1Ni9

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Abstract

Intermetallic compounds La3–xMgxNi9 (x = 1.0, 1.1) were synthesized and their hydrogen sorption and electrochemical properties were studied. The maximum hydrogen storage capacities for La2MgNi9 and La1.9Mg1.1Ni9 were shown to be 1.6±0.1 and 1.5±0.1 wt.%, respectively, and the unit cell volume increased by 24% and 16%, respectively, upon the hydrogenation of the alloys. The maximum specific capacity of the electrodes with the La1.9Mg1.1Ni9 and La2MgNi9 alloys is 390 mA h g–1 at a discharge current density of 60 mA g–1, which is 24% higher as compared to the similar data for the LaNi5 alloy (315 mA h g–1). The electrodes demonstrate high specific capacity and performance at high current densities, as well as good cyclic stability.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Akad. Semenova, 142432, Chernogolovka, Moscow Region, Russian Federation

    V. B. Son, A. A. Volodin & B. P. Tarasov

  2. Institute for Energy Technology, 18 Instituttveien, P.O. Box 40, NO-2027, Kjeller, Norway

    R. V. Denys & V. A. Yartys

Authors
  1. V. B. Son
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  2. A. A. Volodin
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  3. R. V. Denys
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  4. V. A. Yartys
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  5. B. P. Tarasov
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Correspondence to B. P. Tarasov.

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Son, V.B., Volodin, A.A., Denys, R.V. et al. Hydrogen sorption and electrochemical properties of intermetallic compounds La2MgNi9 and La1.9Mg1.1Ni9 . Russ Chem Bull 65, 1971–1976 (2016). https://doi.org/10.1007/s11172-016-1538-1

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  • DOI: https://doi.org/10.1007/s11172-016-1538-1

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