Tuning the de/hydriding thermodynamics and kinetics of Mg by mechanical alloying with Sn and Zn |
| |
| Affiliation: | 1. Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen, 361024, China;2. School of Materials Science and Engineering, Xiamen University of Technology, Xiamen, 361024, China;1. Science and Technology Institute, Federal University of São Paulo, São José dos Campos, SP, Brazil;2. Department of Materials Engineering, Federal University of São Carlos, São Carlos, SP, Brazil;3. Grenoble Alpes University, CNRS, LEPMI, F-38000 Grenoble, France;1. School of Materials Science and Engineering, South China University of Technology, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou 510641, People''s Republic of China;2. School of Marine Engineering, Jimei University, Xiamen 361021, People''s Republic of China;3. Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Macau SAR, People''s Republic of China;1. CECS, Universidade Federal do ABC, Av. dos Estados 5001, CEP: 09210-580, Santo André, SP, Brazil;2. DEMA, UFSCar, Rod Washington Luis Km 235, CEP: 13565-905 São Carlos, SP, Brazil;3. IRH, Université du Québec à Trois-Rivières, 3351 boul. des Forges, CP 500, G9Y5H7 Trois-Rivières, QC, Canada;1. College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi''an, Shaanxi, 710021, PR China;2. Department of Mechanical Engineering & Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, USA;3. School of Aeronautics, Northwestern Polytechnical University, Xi''an, Shaanxi, 710072, PR China;1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. School of Materials Science and Engineering, Shanghai Institute of Technology, No. 120, Cao Bao Road, Shanghai 200235, China;3. China Iron & Steel Research Institute Group, Advanced Technology & Materials Co., Ltd, No. 76 Xueyuannanlu, Haidian District, Beijing 100081, China;1. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | Mg95Sn3Zn2 alloy was prepared by mechanical alloying. The phase constituents and phase transition were analyzed by X-ray diffraction (XRD) method. The microstructure was characterized by scanning electron microscope (SEM). The hydrogen storage properties were evaluated in detail by the measurements of isothermal hydrogen absorption and desorption, and pressure-composition isotherms (PCI) using the Sieverts method. The addition of Zn benefits to extend the solubility of Sn in the Mg lattice, as a result supersaturated Mg(Sn, Zn) ternary solid solution was synthesized by mechanical alloying, which decomposed to MgH2, Sn and MgZn2 in the hydrogenating process. The in situ formed nanostructure Mg2Sn and MgZn2 have positive effects on the hydrogen absorption and desorption of Mg. Mg95Sn3Zn2 alloy showed significantly improved kinetics with lowered hydrogen absorption and desorption activation energies of 38.1 kJ/mol and 86.6 kJ/mol respectively, and exhibited a reduced dehydriding enthalpy of 67.0 ± 1.9 kJ/(mol·H2). |
| |
| Keywords: | Mg Hydrogen storage materials Hydrogen desorption Kinetics Dehydriding enthalpy Mechanical alloying |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
