Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys
To enhance the hydrogen storage performance of Mg-Ni system alloys, multi-elemental alloys incorporating Y element, namely Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0.3), were synthesized through ball milling and sintering. The microstructures of Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/acf0a1 |
| _version_ | 1797737154224324608 |
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| author | Defa Li Feng Huang Wei Zhang Yanzhou Li Binjun Zhou |
| author_facet | Defa Li Feng Huang Wei Zhang Yanzhou Li Binjun Zhou |
| author_sort | Defa Li |
| collection | DOAJ |
| description | To enhance the hydrogen storage performance of Mg-Ni system alloys, multi-elemental alloys incorporating Y element, namely Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0.3), were synthesized through ball milling and sintering. The microstructures of Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0.3) alloys were characterized using XRD and SEM/EDS techniques, and the hydrogen storage properties of Mg _2 Ni _0.9 Co _0.1 and Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloys were evaluated via the Sieverts method. At a sintering temperature of 500 °C, the Y element existed in the form of Y/Y _2 O _3 phases and displayed no reactivity with other alloy constituents. The addition of Y enhanced the activation performance of Mg-Ni system alloys, because it takes 2 times for Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloy to complete activation, while Mg _2 Ni _0.9 Co _0.1 needs 3, albeit causing a slight reduction from 3.6 wt% to 3.2 wt% in the hydrogen storage capacity when Y replaced Mg. The enthalpy of hydrogen desorption of Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloy was 57.4 kJ mol ^−1 H _2 , which was significantly lower than that of Mg _2 Ni _0.9 Co _0.1 (68.0 kJ mol ^−1 H _2 ) and Mg _2 Ni alloy (64.4 kJ mol ^−1 H _2 ), indicating improved thermodynamic properties. Moreover, the apparent activation energy of Mg _2 Ni _0.9 Co _0.1 (71.48 kJ mol ^−1 H _2 ) was lower than that of Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 (83.62 kJ mol ^−1 H _2 ), implying that the addition of Y reduced the kinetic properties. |
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| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T13:24:18Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-728e4a8f1f864e16bce130a9750db3222023-08-25T09:49:52ZengIOP PublishingMaterials Research Express2053-15912023-01-0110808550410.1088/2053-1591/acf0a1Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloysDefa Li0https://orcid.org/0009-0007-8883-8439Feng Huang1Wei Zhang2Yanzhou Li3Binjun Zhou4School of Mechanical and Vehicle Engineering, West Anhui University , Luan 237012, Anhui, People’s Republic of ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology , 430070, People’s Republic of China; School of Materials Science and Engineering, Harbin Institute of Technology , 150001, People’s Republic of ChinaSchool of Mechanical and Vehicle Engineering, West Anhui University , Luan 237012, Anhui, People’s Republic of ChinaSchool of Mechanical and Vehicle Engineering, West Anhui University , Luan 237012, Anhui, People’s Republic of ChinaSchool of Mechanical and Vehicle Engineering, West Anhui University , Luan 237012, Anhui, People’s Republic of ChinaTo enhance the hydrogen storage performance of Mg-Ni system alloys, multi-elemental alloys incorporating Y element, namely Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0.3), were synthesized through ball milling and sintering. The microstructures of Mg _2-x Y _x Ni _0.9 Co _0.1 (x = 0, 0.1, 0.2, 0.3) alloys were characterized using XRD and SEM/EDS techniques, and the hydrogen storage properties of Mg _2 Ni _0.9 Co _0.1 and Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloys were evaluated via the Sieverts method. At a sintering temperature of 500 °C, the Y element existed in the form of Y/Y _2 O _3 phases and displayed no reactivity with other alloy constituents. The addition of Y enhanced the activation performance of Mg-Ni system alloys, because it takes 2 times for Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloy to complete activation, while Mg _2 Ni _0.9 Co _0.1 needs 3, albeit causing a slight reduction from 3.6 wt% to 3.2 wt% in the hydrogen storage capacity when Y replaced Mg. The enthalpy of hydrogen desorption of Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 alloy was 57.4 kJ mol ^−1 H _2 , which was significantly lower than that of Mg _2 Ni _0.9 Co _0.1 (68.0 kJ mol ^−1 H _2 ) and Mg _2 Ni alloy (64.4 kJ mol ^−1 H _2 ), indicating improved thermodynamic properties. Moreover, the apparent activation energy of Mg _2 Ni _0.9 Co _0.1 (71.48 kJ mol ^−1 H _2 ) was lower than that of Mg _1.7 Y _0.3 Ni _0.9 Co _0.1 (83.62 kJ mol ^−1 H _2 ), implying that the addition of Y reduced the kinetic properties.https://doi.org/10.1088/2053-1591/acf0a1Mg-based hydrogen storage alloysmicrostructurehydrogen storage propertiesproperties |
| spellingShingle | Defa Li Feng Huang Wei Zhang Yanzhou Li Binjun Zhou Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys Materials Research Express Mg-based hydrogen storage alloys microstructure hydrogen storage properties properties |
| title | Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys |
| title_full | Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys |
| title_fullStr | Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys |
| title_full_unstemmed | Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys |
| title_short | Microstructure and properties study of Mg2-xYxNi0.9Co0.1 (x = 0, 0.1, 0.2, 0.3) hydrogen storage alloys |
| title_sort | microstructure and properties study of mg2 xyxni0 9co0 1 x 0 0 1 0 2 0 3 hydrogen storage alloys |
| topic | Mg-based hydrogen storage alloys microstructure hydrogen storage properties properties |
| url | https://doi.org/10.1088/2053-1591/acf0a1 |
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