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Journal of Physical Studies 24(4), Article 4705 [7 pages] (2020)
DOI: https://doi.org/10.30970/jps.24.4705 HYDROGENATION PROPERTIES OF Gd1-xTixNi (0<x<1)
K. Kluziak{1}, V. Pavlyuk{1,2}
{1}Institute of Chemistry, Jan Długosz University in Częstochowa,
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Rare-earth based alloys are the most popular combinations for creating electrode materials for nickel-metal-hydride (NiMH) batteries. This paper presents the results of electrochemical hydrogenation of $AB$ type alloys Gd$ _{1-x} $Ti$ _{x} $Ni $(0<x<1)$. Good hydrogen storage properties of rare-earth metals are known, thanks to the insertion of the third component in the form of titanium the kinetics of hydrogen sorption/desorption have been improved and corrosion resistance has been increased. The synthesized of Gd$ _{1-x} $Ti$ _{x}$Ni $(0<x<1)$ alloys were studied by various experimental techniques, such as XRD, SEM, EPMA, gas and electrochemical hydrogenations. The insertion of Ti had a significant impact on improving the stability of charge/discharge cycles, corrosion protection, and reducing production costs by reducing the amount of rare earth metals. As an element capable of absorbing hydrogen titanium tends to form a passive oxide in 6M KOH electrolyte, which prevents corrosion of the anode.
Key words: alloys, electrochemical hydrogenation, hydrides, NiMH batteries, electrode materials, corrosion
