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Nanostructuring of Mg-Based hydrogen storage Materials:Recent Advances for Promoting Key Applications

Nano-Micro Letters 2023年第7期15卷 30-56页

作者： Li Ren Yinghui Li Ning Zhang Zi Li Xi Lin Wen Zhu Chong Lu Wenjiang Ding Jianxin Zou National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composites Shanghai Engineering Research Center of Mg Materials and Applications and School of Materials Science and EngineeringCenter of Hydrogen ScienceShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Instrumental Analysis Center of SJTU Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

With the depletion of fossil fuels and global warming,there is an urgent demand to seek green,low-cost,and high-efficiency energy *** has been considered as a potential candidate to replace fossil fuels,due to its high gravimetric energy density(142 MJ kg^(-1)),high abundance(H_(2)O),and ***,due to its low volume density,effective and safe hydrogen storage techniques are now becoming the bottleneck for the"hydrogen economy".Under such a circumstance,Mg-based hydrogen storage materials garnered tremendous interests due to their high hydrogen storage capacity(~7.6 wt%for MgH_(2)),low cost,and excellent ***,the high thermodynamic stability(ΔH=-74.7 kJ mol^(-1)H_(2))and sluggish kinetics result in a relatively high desorption temperature(>300℃),which severely restricts widespread applications of MgH_(2).Nano-structuring has been proven to be an effective strategy that can simultaneously enhance the ab/de-sorption thermodynamic and kinetic properties of MgH_(2),possibly meeting the demand for rapid hydrogen desorption,economic viability,and effective thermal management in practical ***,the fundamental theories,recent advances,and practical applications of the nanostructured Mg-based hydrogen storage materials are *** synthetic strategies are classified into four categories:free-standing nano-sized Mg/MgH_(2)through electrochemical/vapor-transport/ultrasonic methods,nanostructured Mg-based composites via mechanical milling methods,construction of core-shell nano-structured Mg-based composites by chemical reduction approaches,and multi-dimensional nano-sized Mg-based heterostructure by nanoconfinement *** applying these strategies,near room temperature ab/de-sorption(6 wt%)has been achieved in nano Mg/MgH_(2)*** perspectives on the future research and development of nanostructured hydrogen storage materials are also provided.

关键词： Mg-based hydrogen storage materials Nanostructure hydrogen storage Thermodynamics Kinetics on-board hydrogen storage

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