摘要
Mg-based materials have been intensively studied for hydrogen storage applications due to their high energy density up to 2600 Wh/kg or 3700 Wh/L.However,the Mg-based materials with poor kinetics and the necessity for a high temperature to achieve 0.1 MPa hydrogen equilibrium pressure limit the applications in the onboard storage in Fuel cell vehicles(FCVs).Over the past decades,many methods have been applied to improve the hydriding/dehydriding(H/D)kinetics of Mg/MgH 2 by forming amorphous or nanosized particles,adding catalysts and employing external energy field,etc.However,which method is more effective and the intrinsic mechanism they work are widely differing versions.The hydrogenation and dehydrogenation behaviors of Mg-based alloys analyzing by kinetic models is an efficient way to reveal the H/D kinetic mechanism.However,some recently proposed models with physical meaning and simple analysis method are not known intimately by researchers.Therefore,this review focuses on the enhancement method of kinetics in Mg-based hydrogen storage materials and introduces the new kinetic models.
基金
H.Shao acknowledges the Macao Science and Technol-ogy Development Fund(FDCT)for funding(project no.118/2016/A3 and 0062/2018/A2)
and this work was also par-tially supported by a Start-Up Research Fund from the Uni-versity of Macao(SRG2016-00088-FST)
Q.Li also thanks the financial support from the National Natural Science Foun-dation of China(51671118)
Young Elite Scientists Sponsor-ship Program by CAST(2017QNRC001)
the“Chenguang”Program from the Shanghai Municipal Education Commission(17CG42)
Science and Technology Committee of Shanghai(16520721800)
the Program for Professor of Special Ap-pointment(Eastern Scholar)by Shanghai Municipal Educa-tion Commission(No.TP2015040).
。
