Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films

Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the preparation of anisotropy 3D graphene aerogel films (GAFs) made from tightly packed graphene films using a thermal expansion method. GAFs with different thicknesses and an ultimate low density of 4.19 mg cm−3 were obtained. GAFs show high anisotropy on average cross-plane thermal conductivity (K⊥) and average in-plane thermal conductivity (K||). Additionally, uniaxially compressed GAFs performed a large elongation of 11.76% due to the Z-shape folding of graphene layers. Our results reveal the ultralight, ultraflexible, highly thermally conductive, anisotropy GAFs, as well as the fundamental evolution of macroscopic assembled graphene materials at elevated temperature.

Electrokinetic effect and H2O2 boosting in synthetic graphene/α-FeOOH aerogel films for the generation of electricity

Novel catalytic α-FeOOH/graphene aerogel films for high performance hydrovoltaic power generation devices have been developed with an exceptionally high power density of 47 mW m−2 upon the addition of H2O2 to the saline solution.

Mo2C-embedded biomass-derived honeycomb-like nitrogen-doped carbon nanosheet/graphene aerogel films for highly efficient electrocatalytic hydrogen evolution

Honeycomb-like Mo2C@nitrogen-doped carbon nanosheet/graphene aerogel films were synthesized successfully by solid-state reaction between (NH4)6Mo7O24 and regenerated chitin/graphene oxide aerogel.