Objective The safe and efficient of hydrogen storage is of great significance to the development of clean energy industrialization. Aquifer, which is widely distributed and has huge storage potential, is a potential body for safe and efficient underground storage of hydrogen. The feasibility of hydrogen storage in underground aquifers is analyzed.

Methods By investigating domestic and foreign literature on hydrogen storage of aquifer, on the basis of clarifying the influence of hydrogen physical and chemical properties on aquifers, the existing cases of underground hydrogen storage are analyzed, and the influences of various factors on hydrogen storage of aquifer are explored.

Results The sandstone with low carbonate and sulfate cement content and the geological conditions with no calcite in the caprock are more suitable for underground hydrogen storage, and it is advantageous to store hydrogen in the reservoir rich in clay minerals; The influence of microorganisms should be considered for underground hydrogen storage; Both carbon dioxide and nitrogen can be used as cushion gases. At the moment when China is making a major strategic decision on the "dual carbon" goal, the research on carbon dioxide as a cushion gas should be emphasized.

Conclusions At present, there are no examples of pure hydrogen storage in underground aquifers, but the related numerical simulation researches and influence factors analysis demonstrate the feasibility of hydrogen storage in aquifers.