Facile Fabrication of Hierarchically Porous CuFe₂O₄ Nanospheres with Enhanced Capacitance Property

Abstract

In this work, CuFe2O4 nanospheres with hierarchically porous structure have been synthesized via a facile solvothermal procedure. The superstructures consist of the textured aggregations of nanocrystals with high specific surface area, pore volume, and uniform pore size distribution.To figure out the formation mechanism, we discussed in detail the effects of a series of experimental parameters, including the concentrations of the precipitation agent, stabilizer agent, and reaction temperature and time on the size and morphology of the resulting products. Furthermore, the electrochemical properties of CuFe2O4 nanospheres were evaluated by cyclic voltammetry and galvanostatic charge-dischrge studies. The results demonstrate that the as-prepared CuFe2O4 nanospheres are excellent electrode material in supercapacitor with high specific capacitance and good retention. The hierarchically CuFe2O4 nanospheres show the highest capacitance of 334F/g, and 88% of which can still be maintained after 600 charge-discharge cycles.

Nanoflower-like CuO/Cu(OH)2 hybrid thin films: Synthesis and electrochemical supercapacitive properties

“…The BET specific surface area of the product was found to be 59.7 m 2 g À1 , which is nearly twice as large as that reported by Fu et al [20]. The special high BET surface area and mesoporous structure of the thin flowerlike nanostructures provide the possibility of efficient transport of electrons and ions in supercapacitors, which will lead to high electrochemical capacity [21].…”

Hierarchical 3D-flower-like CuO nanostructure on copper foil for supercapacitors

“…3b). These nanopetals are interconnected with each other, which provides a high volumetric specific surface area and good mass transport property [19] and generate pores and crevices which allow large surface area for easy diffusion of the electrolyte onto the nanopetals surface [20]. Fig.…”

Highly sensitive acetone gas sensor based on porous ZnFe2O4 nanospheres

“…Therefore, research on the novel sensing materials for further improving the performances of sensors is a hot topic. Spinel ferrites (AFe 2 O 4 , A=Zn, Ni, Cu, Cd, Co), in which the transition metal cation A 2+ is incorporated into the lattice of the parent structure of (Fe 2+ Fe 2 3+ O 4 ) [16], are already A c c e p t e d M a n u s c r i p t 4 widely applied in a variety of fields [17][18][19][20][21][22][23], which attributes to their environmental friendliness, low …”