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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 resources.hydrogen 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 environmentalfriendliness.However,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 reversibility.However,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 applications.Herein,the fundamental theories,recent advances,and practical applications of the nanostructured mg-based hydrogen storage materials are discussed.The 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 strategy.Through applying these strategies,near room temperature ab/de-sorption(6 wt%)has been achieved in nano mg/mgH_(2)systems.Some 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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Magnesium-based energy materials: Progress, challenges, and perspectives

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Journal of Magnesium and Alloys 2023年第11期11卷 3896-3925页

作者： Guang Han Yangfan Lu Hongxing Jia Zhao Ding Liang Wu Yue Shi Guoyu Wang Qun Luo Yu'an Chen Jingfeng Wang Guangsheng Huang Xiaoyuan Zhou Qian Li Fusheng Pan National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China College of materials Science and Engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China Chongqing Institute of New Energy storage materials and Equipment Chongqing 401135China State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China College of Physics Chongqing UniversityChongqing 401331China

Magnesium-based energy materials, which combine promising energy-related functional properties with low cost, environmental compatibility and high availability, have been regarded as fascinating candidates for sustainable energy conversion and storage. In this review,we provide a timely summary on the recent progress in three types of important mg-based energy materials, based on the fundamental strategies of composition and structure engineering. With regard to mg-based materials for batteries, we systematically review and analyze different material systems, structure regulation strategies as well as the relevant performance in mg-ion batteries(MIBs) and mg-air batteries(MABs), covering cathodes, electrolytes, anodes for MIBs, and anodes for MABs;as to mg-based hydrogen storage materials, we discuss how catalyst adding, composite, alloying and nanostructuring improve the kinetic and thermodynamic properties of de/hydrogenation reactions, and in particular, the impacts of composition and structure modification on hydrogen absorption/dissociation processes and free energy modification mechanism are focused;regarding mg-based thermoelectric materials, the relations between composition/structure and electrical/thermal transport properties of mg_(3)X_(2)(X = Sb, Bi), mg_(2)X(X = Si, Ge, Sn) and mg Ag Sb-based materials, together with the representative research progress of each material system, are summarized and discussed. Finally, by pointing out remaining challenges and providing possible solutions, this review aims to shed light on the directions and perspectives for practical applications of magnesium-based energy materials in the future.

关键词： mg-based battery materials mg-based hydrogen storage materials mg-based thermoelectric materials Composition regulation Structure engineering

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