Facile synthesis and capacitive performance of Cu@Cu2O/graphene nanocomposites

Preparation of binder-free CuO/Cu2O/Cu composites: a novel electrode material for supercapacitor applications

“…As seen in Table 1, the common preparation technique for Cu 2 O electrodes is to rstly synthesise pure Cu 2 O 30 or Cu 2 O and carbonous material composites [31][32][33][34] and then smear the electrochemically active materials with a conductive agent and binder onto the current collector. Compared to the above synthesis method, active materials directly grown on conductive substrates are more benecial to improving supercapacitor performance, because the design of active materials directly grown on a three-dimensional current collector could efficiently facilitate the transport of electrons and ions, improving the utilization of active materials and substantially enhancing the energy density and power density.…”

Facile fabrication of hierarchical porous carbon for a high-performance electrochemical capacitor

“…It may be owing to the good conductivity and well developed hierarchical porosity, in which the interconnected macropores serve as electrolyte reservoirs to reduce the diffusion distances of charges; while the small mesopores allow the fast ions transfer at high current density. 37 Cyclic stability of the electrode is one of the most important factors in determining the supercapacitors for practical applications. Fig.…”

“…It is accepted that the semicircle reects the electrochemical reaction impedance of the electrode and a bigger semicircle means a large charge-transfer resistance. 37 It can be calculated that the HPCs have the low R s values (0.71, 0.60 and 0.75 U for HPC-1,2,3, respectively), and HPC-1 has the smaller R ct value (0.09 U) than that for HPC-2 (0.27 U) and HPC-3 (0.45 U), which suggest that the HPC-1 has a low charge transfer resistance at high frequency ranges. The straight line indicates the diffusion of the electroactive species and a higher slope signies lower diffusion rate.…”

Electrochemical biosensor based on Cu/Cu2O nanocrystals and reduced graphene oxide nanocomposite for sensitively detecting ractopamine

“…Exfoliated GO (10 mL of 1 mg mL −1 ) was added into the reaction system. In the reaction system, the exfoliated porous GO was reduced to porous rGO by glucose as the reduction agent, whereas Cu(II) in Cu(CH3COO)2 was reduced to Cu(0) or Cu(I) [33]. The resultant solution was filtered with a Bush funnel and dried in vacuum at 60 ℃.…”

“…After stirring for 30 min, the resultant solution was filtered with a Bush funnel and then dried in vacuum at 60 ℃. Finally, Cu2O nanospheres were obtained [32].…”