Enhanced Hydrogen Storage in Graphene Oxide‐MWCNTs Composite at Room Temperature

Abstract High hydrogen capacity (up to 2.6 wt%) is reported for highly aligned structures of Graphene oxide‐Multiwalled carbon nanotubes composite at room temperature. It is demonstrated that the scalable liquid crystal route can be employed as a new method to prepare unique 3‐D framework of graphene oxide layers with proper interlayer spacing as building blocks for cost‐effective high‐capacity hydrogen storage media. The strong synergistic effect of the intercalation of MWCNTs as 1‐D spacers within graphene oxide frameworks resulted in unrivalled high hydrogen capacity at ambient temperature. The mechanisms involved in the intercalation procedure are fully discussed. The main concept behind intercalating one‐dimensional spacers in between giant GO sheets represents a versatile and highly scalable route to fabricate devices with superior hydrogen uptake.