Fabrication and electrochemical properties of activated CNF/Cu x Mn 1−x Fe 2 O 4 composite nanostructures

摘要: This work reports the fabrication and electrochemical properties of activated carbon nanofibers composited with copper manganese ferrite (ACNF/Cu x Mn1−xFe2O4: x = 0.0, 0.2, 0.4, 0.6, 0.8) nanostructures. The obtained samples were characterized by means X-ray diffraction, field emission scanning electron microscopy, Brunauer–Emmett–Teller analyzer, thermal gravimetric analysis, photoemission spectroscopy, absorption spectroscopy. supercapacitive behavior electrodes is tested using cyclic voltammetery, galvanostatic charge–discharge impedance By varying ‘x’, highest specific capacitance 384 F/g at 2 mV/s CV 314 F/g 2 A/g GCD are for x = 0.2 electrode. second one 235 F/g 172 F/g observed x = 0.8 corresponding energy densities 74 41 Wh/kg, respectively. It that stability prepared strongly depend on amount carbon, while was enhanced sample nearly proportional between CuMnFe2O4. Such results may arise from synergetic effect CuMnFe2O4 ACNF.