(1. GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China) (2. National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, GRINM Group Co., Ltd., Beijing 100088, China) (3. General Research Institute for Nonferrous Metals, Beijing 100088, China）
Rare earth hydrogen storage materials have the advantages of easy activation, flat hydrogen absorption and desorption platforms, moderate pressure, small differential pressure, good resistance to impurity gas poisoning, and room temperature operation ability. They are widely used as electrode materials for Ni/MH secondary batteries, and play an increasingly important role in the field of hydrogen fuel cells as safe and efficient hydrogen storage materials. In this paper, the main research progress of LaNi5 type and superlattice type rare earth hydrogen storage materials in recent years is reviewed, from three aspects of composition optimization, structure control and properties attenuation mechanism. Finally, the challenges faced by the application of rare earth hydrogen storage materials and the future development direction are discussed. Our country is rich in rare earth resources, to vigorously expand the application of rare earth hydrogen storage materials in hydrogen energy and secondary battery industries, it is of great strategic significance for the comprehensive utilization of rare earth resources in China.