Development of Preparation Methods of Metallic Hydrogen Storage Materials

Metal hydrogen storage materials can be divided into AB₂（Laves phase alloy, such as Ti-Mn-based alloy）, A₂B（magnesium-nickel alloy）, AB₅ rare earth mixed alloy, AB titanium alloy, vanadium-based solid solution, magnesium-based hydrogen storage alloy and so on. The preparation methods of metal hydrogen storage materials are roughly divided into two categories, one is that the material synthesis methods, mainly including vacuum arc melting method, vacuum medium frequency induction method, etc.; and the other is that the secondary processing methods, mainly including mechanical alloying method,gas atomization method and so on. Different preparation methods have different effects on the microstructure and hydrogen storage properties of metal hydrogen storage materials. The preparation methods of various metal hydrogen storage materials and their advantages and disadvantages are described. The effects of various preparation methods of metal hydrogen storage materials on the microstructure and hydrogen storage properties of hydrogen storage alloys were reviewed.