Hydrogen sorption and electrochemical properties of intermetallic compounds La2MgNi9 and La1.9Mg1.1Ni9
- Authors: Son V.B.1, Volodin A.A.1, Denys R.V.2, Yartys V.A.2, Tarasov B.P.1
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Affiliations:
- Institute of Problems of Chemical Physics, Russian Academy of Sciences
- Institute for Energy Technology
- Issue: Vol 65, No 8 (2016)
- Pages: 1971-1976
- Section: Full Articles
- URL: https://journals.rcsi.science/1066-5285/article/view/238711
- DOI: https://doi.org/10.1007/s11172-016-1538-1
- ID: 238711
Cite item
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.
About the authors
V. B. Son
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Email: tarasov@icp.ac.ru
Russian Federation, 1 prosp. Akad. Semenova, Chernogolovka, Moscow Region, 142432
A. A. Volodin
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Email: tarasov@icp.ac.ru
Russian Federation, 1 prosp. Akad. Semenova, Chernogolovka, Moscow Region, 142432
R. V. Denys
Institute for Energy Technology
Email: tarasov@icp.ac.ru
Norway, 18 Instituttveien, Kjeller, NO-2027
V. A. Yartys
Institute for Energy Technology
Email: tarasov@icp.ac.ru
Norway, 18 Instituttveien, Kjeller, NO-2027
B. P. Tarasov
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Author for correspondence.
Email: tarasov@icp.ac.ru
Russian Federation, 1 prosp. Akad. Semenova, Chernogolovka, Moscow Region, 142432