Chemical Routes to Graphene-Based Flexible Electrodes for Electrochemical Energy Storage - Low-cost Nanomaterials: Toward Greener and More Efficient Energy Applications - page 428

Fig. 9 Digital images (a, b), SEM images (c, d) and TEM images (e-g) of folded structured
graphene paper. h XRD pattern and i structure illustration of folded structured graphene paper
subsequent thermal reduction. As shown in Fig. 9 a and b, this new type of
graphene paper is freestanding and highly flexible. SEM images of the graphene
paper in Fig. 9 c show flat surface, which is similar with graphene paper fabricated
by vacuum filtration method, and assembled graphene nanosheets can be observed
in the entire paper sample. The SEM image taken from the cross section in Fig. 9 d
revealed many close edges of graphene nanosheets instead of open edges in
graphene paper obtained by vacuum filtration, and TEM images in Fig. 9 e-g
indicated that besides layer stacking, the folding of graphene layers is also a
common structure feature in the graphene paper. The X-ray diffraction pattern in