Institute of Physics of Materials AS CR, v. v. i. > Projects > Kinetics of hydrogen storage in new complex hydrides of (Mg-Ni-M-S)-H type

Kinetics of hydrogen storage in new complex hydrides of (Mg-Ni-M-S)-H type

InvestigatorRNDr. Jiří Čermák, CSc., DSc.
Number of Project17-21683S
AgencyGrantová agentura České republiky
Duration2016-12-31 - 2019-12-30

Anotace
New types of hydrogen storage alloys with high sorption kinetics and high capacity are the keys to promote the applications in the area of clean power generation. Among the many candidates for hydrogen storage alloys, Mg and Mg-based alloys steadily attract attention due to the Mg abundance, low density and high hydrogen storage capacity. High stability of hydrides in these alloys, sluggish sorption kinetics and high operation temperature are the main obstacles impeding their wide application in clean power generation, storage and transport. Targets of this project are to find stable intermetallics Mg-X (9candidate elements of the 13th and 14th group) and powdered amorphous alloys N (candidate alloys: Fe-Ni-B a Co-Fe) that would act as effective gates for easy hydrogen sorption and that preserve storage capacity of the base Mg-Ni-C. The principal preparation technique is ball-milling of Mg-Ni-C base with Mg-X and/or with N that would catalyze the hydrogen sorption, enable fine milling and suppress the oxidation of the composition. Main experimental techniques: PCT, SEM, XDR, DSC. Measured sorption characteristics: kinetic constants, cycling durability, sorption capacity, activation enthalpy and entropy of sorption, TPS spectra. Theoretical calculations Mg-X will be also conducted.


2021

Káňa T., Čermák J., Král L.: Substitution of nickel in Mg2Ni and its hydride with elements from groups XIII and XIV: An ab initio study. Int. J. Hydrogen Energy 46 (2021) 15691-15701



2020

Čermák J., Král L., Roupcová P.: Significantly decreased stability of MgH2 in the Mg-In-C alloy system: Long-period-stacking-ordering as a new way how to improve performance of hydrogen storage alloys?. Renewable Energy 150 (2020) 204-212

Čermák J., Král L., Roupcová P.: Significant decrease of hydride decomposition enthalpy in ordered Mg-In alloys induced by growing hydrogen concentration. Kovové materiály 58 (2020) 161-167



2019

Král L., Čermák J.: Improvement of hydrogen storage properties of Mg by catalytic effect of Al-containing phases in Mg-Al-Ti-Zr-C powders. Int. J. Hydrogen Energy 44 (2019) 13561-13568

Čermák J., Král L., Roupcová P.: Improved hydrogen sorption kinetics in Mg modified by chosen catalysts. Int. J. Hydrogen Energy 44 (2019) 8315-8324



2018

Čermák J., Král L.: Hydrogen storage behavior of Mg@Mg2Si and Mg@Mg17Al12 alloys with additions of carbon allotropes and talc. J. Alloys Comp. 744 (2018) 252-259

Čermák J., Král L.: Hydrogen absorption in carbon allotropes and talc. Kovové materiály 56 (2018) 75-80