Microstructure and hydrogen storage properties of Mg1.8Y0.2Ni1−yCoy (y = 0, 0.05, 0.1, 0.15, 0.2) alloys
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Published:2023-11-01
Issue:11
Volume:10
Page:115502
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ISSN:2053-1591
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Container-title:Materials Research Express
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language:
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Short-container-title:Mater. Res. Express
Author:
Defa LiORCID,
Huang Feng,
Ren Bingzhi,
Wang Shujie,
Zhang Wei,
Zhu Liming
Abstract
Abstract
The Mg1.8Y0.2Ni1−yCoy (y = 0, 0.05, 0.1, 0.15, 0.2) hydrogen storage alloys were prepared following the principles of metallurgy, the phase composition and microstructure of the alloys were studied using XRD and SEM/EDS techniques, and the hydrogen absorption and desorption properties of the alloys were studied using PCT and DSC techniques. The results showed that the addition of Co did not affect the phase composition of Mg1.8Y0.2Ni1−yCoy alloys in the as-cast state and after hydrogen absorption. The Co addition could help refine the microstructure of the alloys to a certain extent. The de-/hydrogenation kinetics of Mg1.8Y0.2Ni1−yCoy (y = 0, 0.1, and 0.2) alloys were improved by adding Co, and the best results were obtained at y = 0.1. The onset decomposition temperature of Mg1.8Y0.2Ni1−yCoy (y = 0, 0.1, and 0.2) alloys were recorded to be 180 °C, 156 °C, and 210 °C, respectively, which were significantly lower than that of Mg2Ni (253 °C). The results revealed that the addition Co could improve the thermodynamic performance of the dehydrogenation process.
Funder
West Anhui University
National Natural Science Foundation of China
Natural Science Foundation of Chongqing, China
Scientific Research Foundation of Education Department of Anhui Province of China
Chongqing Education Commission of China
Subject
Metals and Alloys,Polymers and Plastics,Surfaces, Coatings and Films,Biomaterials,Electronic, Optical and Magnetic Materials
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