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Hydrogen storage is critical to realize the so-called hydrogen economy in which fuel cells vehicle(FCV)is the engine room.The most recently commercialized FCVs such as Mirai(Toyota,Japan)and Clarity(Honda,Japan)use the high pressure hydrogen gases(70Mpa)as hydrogen storage.The capacity of hydrogen can reach a weight percentage of 5.7%,which exceeds the Department of Energy(DoE)of USA in 2017.However,this method of hydrogen storage still have some concerns,e.g.the safety issue and the energy consumption when presses the gas.