Synthesis of novel graphene/Co3O4/polypyrrole ternary nanocomposites as electrochemically enhanced supercapacitor electrodes

Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

“…There are several transition metal oxides (NiO [22,25,26], CuO [27], FeVO 4 [28], Fe 2 O 3 [29], Co 3 O 4 [30], Mn 3 O 4 [31], etc. ), and their nanocomposites have been fabricated by co-precipitation method for supercapacitor applications.…”

“…The significant 382.83 C g -1 at 1 A g -1 in 2M KOH electrolyte is due to the incorporation of highly-conductive Co-Fe double hydroxide layer and high specific area of PPy/GO [18]. Moreover, Khalaj et al [30] synthesized a co-precipitated Gr/Co 3 O 4 /PPy ternary nanocomposite with the specific capacity of 422 F g -1 at 10 mV s -1 in 6M KOH. This nanocomposite also exhibited the energy density of 13.4 Wh kg -1 owing to the synergic effect of its three components.…”

In situ hydrothermal synthesis of nickel cobalt sulfide nanoparticles embedded on nitrogen and sulfur dual doped graphene for a high performance supercapacitor electrode

“…The comparison of electrochemical NCS/NS-G electrode sample with other reports are also illustrated in Table 3 . These results suggest a high sufficient performance of NCS/NS-G electrode and its performance outperform many previous reports of nickel/cobalt-based materials such as cobalt sulfide/graphitic carbon nitride (18.5 W h kg −1 at power density of 99.8 W kg −1 ), 59 Co 3 O 4 thin film (6.4 W h kg −1 at power density of 0.4 kW kg −1 ), 60 beta phase Co(OH) 2 nanowires (13.6 W h kg −1 at power density of 153 W kg −1 ), 61 graphene/Co 3 O 4 /polypyrrole (13.4 W h kg −1 at power density of 250 W kg −1 ), 62 and nickel cobalt sulfide nanosheets on Ni nanowire film (18.4 mW h cm −3 at power density of 254.5 mW cm −3 ). 63 …”

Preparation of rGO@Fe3O4 nanocomposite and its application to enhance the thermal conductivity of epoxy resin

“…This is because a large number of Fe 3 O 4 nanoparticles are adsorbed on the surface of graphene, which effectively impedes the interlamellar accumulation of graphene and makes it difficult to form a graphene-like layered accumulation structure, resulting in an unobtrusive diffraction peak. 37 …”