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Keywords:

  • adsorption;
  • capacitors;
  • graphene;
  • oxygen reduction reaction;
  • ultralight materials
Thumbnail image of graphical abstract

Graphene lite: A density of (2.1±0.3) mg cm−3, the lowest to date for a graphene framework architecture, is achieved by preparing an ultralight, N-doped, 3D graphene framework (see photo of a block of the material balancing on a dandelion). Its adsorption capacity for oils and organic solvents is much higher than that of the best carbonaceous sorbents, and it is a promising electrode material for supercapacitors (484 F g−1) and as a metal-free catalyst for the oxygen reduction reaction.