Fig. 2
The proposed formation mechanism of CNFIG: a the directional freezing leads to the creation of ice pillars, the parallel alignment of graphene sheets, and the aligned channels for CNFs. b the mechanism of the perpendicular alignment of the CNFs by the parallel alignment of graphene sheets. SEM images of the CNFIG: c CNFIG and carbon aerogels prepared from raw materials of d pure PAA matrix, e GO@PAA, f GO@CNF, g PAA@CNF, h GO@PAA@short CNF. (Scale bars: c 10āĪ¼m, d 30āĪ¼m, e 10āĪ¼m, f 4āĪ¼m, g. 5āĪ¼m, h 5āĪ¼m)
