Crystal structure and electrochemical hydrogenation of HoNiIn1-xAlx (x = 0-1) solid solution

G. Nychyporuk; V. Kordan; M. Horiacha; B. Halyatovskii; O. Hudzo; V. Zaremba; V. Pavlyuk

doi:10.15330/pcss.24.3.578-583

Authors

G. Nychyporuk Ivan Franko National University of Lviv, Lviv, Ukraine
V. Kordan Ivan Franko National University of Lviv, Lviv, Ukraine
M. Horiacha Ivan Franko National University of Lviv, Lviv, Ukraine
B. Halyatovskii Ivan Franko National University of Lviv, Lviv, Ukraine
O. Hudzo Ivan Franko National University of Lviv, Lviv, Ukraine
V. Zaremba Ivan Franko National University of Lviv, Lviv, Ukraine
V. Pavlyuk Jan Długosz University of Czestochowa, Czestochowa, Poland; Ivan Franko National University of Lviv, Lviv, Ukraine

DOI:

https://doi.org/10.15330/pcss.24.3.578-583

Keywords:

powder data, solid solution, electrochemical hydrogenation

Abstract

The influence of the substitution of indium by aluminum in HoNiIn compound at 873 K was investigated in the full concentration range by means of powder X-ray diffraction and EDX analysis. The formation of continuous solid solution was determined and changes of the unit cell parameters were calculated:
HoNiIn_1.0–0Al_0–1.0 (ZrNiAl-type structure, space group P-62m, a = 0.74343(4)–0.69959(6) nm and c = 0.37472(3)–0.38289(4) nm, V = 0.17936(2)–0.16229(3) mn³). The best discharge capacity after electrochemical hydrogenation studies of HoNiIn_1-xAl_x solid solution is observed for battery prototypes with HoNiIn_0.2Al_0.8- and HoNiIn_0.4Al_0.6-based electrodes.

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