Mesoporous Co3O4 sheets/3D graphene networks nanohybrids for high-performance sodium-ion battery anode

Fe2O3-reduced graphene oxide composites synthesized via microwave-assisted method for sodium ion batteries

“…S2 in ESIy), showing a decrease in the average size of the sp 2 domains upon the reduction of GO to RGO [46]. The results indicate that the introduction of RGO can increase the specific surface area of Fe 2 O 3 , which may enhance the sodium storage capacity [32,33].…”

“…Graphene (normally obtained by chemical reduction of graphene oxide (GO) and called as reduced graphene oxide (RGO) with a unique twodimensional conjugated chemical structure should also be considered as an ideal matrix in the SIBs because of its large specific surface area, excellent electrical conductivity and superior chemical stability [30,31]. RGO-based composites have been demonstrated with the excellent electrochemical performances [32][33][34][35][36][37][38]. Therefore, development of composite material based on Fe 2 O 3 and RGO should be a promising method to enhance the electrochemical performance of Fe 2 O 3 .…”

Ethanol-assisted solvothermal synthesis of porous nanostructured cobalt oxides (CoO/Co3O4) for high-performance supercapacitors

“…In the Co 2p spectrum of Fig. 4b, two major peaks located at 796.6 and 781 eV can be detected, corresponding to the Co 2p 1/2 and Co 2p 3/2 peaks, respectively, with a spin-energy separation of 15.6 eV [29,30]. For CoO spheres, two prominent shake-up satellite peaks (labeled with the letter 'S') with BE values at 787.2 and 803.5 eV, distinctly verify the presence of the CoO phase.…”

Scalable synthesis and superior performance of TiO2-reduced graphene oxide composite anode for sodium-ion batteries

“…TiO 2 -RGO composite displays a surface area of 190 m 2 g −1 and possesses mesopores with a mean diameter of 5.47 nm. The results indicate that the introduction of RGO can increase the specific surface area of TiO 2 and decrease the mean pore diameter, which can shorten the transport length for sodium ions, offer large electrode/electrolyte interface for the charge-transfer reaction and thus enhance the sodium storage capacity [22,42]. Figure 5 shows the TGA curve of TiO 2 and TiO 2 -RGO composite in a temperature range of 20 to 800°C at 10°C min −1 heating rate in air.…”

“…Among various nanostructured carbon materials, graphene is widely accepted as an ideal matrix for composite because of its superior electrical conductivity, high specific surface area, structural flexibility, and chemical stability. Graphene-based composites have demonstrated excellent electrochemical performances in a variety of applications [22,[36][37][38]. Therefore, it is expected that the incorporation of graphene into TiO 2 should be a promising method to enhance its electrochemical performance for SIBs.…”