▎ 摘　　要

NOVELTY - Lithiation-induced porous palladium/nitrogen-doped graphene aerogel composite comprises a nitrogen-doped porous carbonaceous structure and a porous metal nanoparticle, where the porous carbonaceous structure and the porous metal nanoparticle have pores. USE - Lithiation-induced porous palladium/nitrogen-doped graphene aerogel composite for highly reversible hydrogen storage. ADVANTAGE - The loss of metal nanoparticle can be reduced during repeated hydrogen storage and desorption, and, thus, the hydrogen storage life can be increased, hydrogen can be easily diffused in the porous carbonaceous structure. The composite may have reversibility by which the hydrogen capacity can be maintained during repeated absorption and desorption. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a method for preparing a lithiation-induced porous palladium/nitrogen-doped graphene aerogel composite for highly reversible hydrogen storage , which involves oxidizing a nitrogen-doped carbonaceous structure-metal nanoparticle composite and forming pores by performing a lithiation process and a lithium removal process to the oxidized nitrogen-doped carbonaceous structure-metal nanoparticle composite to obtain the composite for hydrogen storage; and 2. a hydrogen carrier, which comprises composite for hydrogen storage.