Hierarchical Graphene-Based Material for Over 4.0 Wt % Physisorption Hydrogen Storage Capacity

A hierarchical graphene material composed of micropore (∼0.8 nm), mesopore (∼4 nm), and macropore (>50 nm) and with a specific surface area up to 1305 m 2 g –1 is fabricated for physisorption hydrogen storage at atmospheric air pressure, showing a capacity over 4.0 wt %, which is significantly higher than reported graphene materials and all other kinds of carbon materials.