▎ 摘　　要

NOVELTY - The hydrogen storage material consists of graphite intercalation compound having graphene interlayer in which insertion atom (2) is arranged, and which occludes hydrogen to graphene interlayer. The ratio (DO/RO) of minimum (DO) of potential (D) (kJ/mol) of hydrogen molecule and graphene (1), and distance (RO) (nm) of molecule and graphene when potential (D) is 0, is 3-10 derived from Renard-Johnes relation. USE - For fuel cell electric vehicle (claimed). ADVANTAGE - The hydrogen storage material has favorable hydrogen storage ability. Hydrogen supply is reliably enabled from the hydrogen storage system, and fluctuation of fuel supply amount by change of load of fuel cell is controlled. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) hydrogen storage tank; (2) hydrogen storage system; and (3) fuel cell electric vehicle. DESCRIPTION OF DRAWING(S) - The figure shows the outline structure of the hydrogen storage material. (Drawing includes non-English language text). graphene (1) insertion atom (2)