Energy Material Advances / 2021 / Article / Fig 4

Research Article

Graphene-Based Coronal Hybrids for Enhanced Energy Storage

Figure 4

(a) HR-TEM micrograph showing GO-encapsulated SiO2. Bottom right inset shows the SAED pattern obtained from the surface indicated with a red arrow pointing towards the left. (b) HR-TEM image of 3D porous graphene obtained via hydrogel formation during a self-sacrificial process. Top right inset shows the SAED pattern obtained from the thin surface indicated with a red arrow pointing towards the right. (c) Raman spectrum of a 3D porous graphene structure. (d) FE-SEM image of the 3D porous structure of graphene extracted from the GO/SiO2 core. (e) Comparison of the N2 adsorption/desorption isotherms of a pristine Ni-Co LDH and a coronal nanohybrid of Ni-Co LDH @3D-PG. (f) Comparison of the pore size distribution of a pristine Ni-Co LDH and a coronal nanohybrid of Ni-Co LDH @3D-PG.