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?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F20%3A00519067" target="_blank" >RIV/68081723:_____/20:00519067 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/20:PU139349
Result on the web
<a href="https://doi.org/10.1016/j.renene.2019.12.107" target="_blank" >https://doi.org/10.1016/j.renene.2019.12.107</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.renene.2019.12.107" target="_blank" >10.1016/j.renene.2019.12.107</a>

Result language
angličtina
Original language name
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?
Original language description
Hydrogen storage (HS) performance of Mg-In-CB alloys (CB – amorphous carbon) is studied. Indium concentration covers primary solid solution (Mg), two phase area (Mg) + β1 and also alloys containing ordered β structures. Seven Mg-In-CB alloys are prepared by ball-milling in hydrogen atmosphere. Kinetic curves and PCT isotherms are measured in the temperature interval from 200 °C to 375 °C. Hydrogen sorption experiments are done by the Sieverts method under the hydrogen gas pressure ranging from 0.1 MPa to 2.5 MPa. X-ray diffraction spectroscopy is used for structure investigation. Alloy with β’’ structure shows reversible amorphization during temperature cycling between about 100 °C and 350 °C. It is found that hydrogen sorption capacity varies between about 6 wt % H2 for (Mg) and 0.6 wt % H2 for β’’ structure. Hydride decomposition enthalpy calculated from desorption PCT experiments decreases to 54 ± 3 kJ × (mol H2)−1 and 57 ± 3 kJ × (mol H2)−1 for ordered alloys in the interval from 69 to 71 wt % In, and even down to 51.5 kJ × (mol H2)−1 for amorphous β’’ structure. Activation energy of desorption kinetics is also lowered in the ordered structure.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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