Co3O4 thin film prepared by a chemical bath deposition for electrochemical capacitors

Effect of surfactant on the morphology and capacitive performance of porous NiCo2O4

“…The semicircle results from the charge transfer resistance (R ct ) caused by faradaic reactions and a constant phase element one (CPE) [28]. In the lowfrequency range, the straight sloping line represents the electrolyte diffusion process (W) and the diffusion of OH − ion in host materials [29]. The observed combinational resistance values of different samples are all close to 0.8 Ω, which can be obtained from the intercept of the plots on the real axis.…”

Synthesis of hierarchically porous MnO2/rice husks derived carbon composite as high-performance electrode material for supercapacitors

“…Typical triangular shape and highly symmetric feature reveal its good capacitive behavior and superior reversibility. Non-linear variation of potential versus time is caused by pseudocapacitive reactions occured at the interface between active material and electrolyte [48]. According to Eq.…”

Synthesis of Co3O4 nanosheets via electrodeposition followed by ozone treatment and their application to high-performance supercapacitors

“…6(a) and (b), respectively. After estimating the mass of the film from the charge of the electrodeposition process, the specific capacitance was calculated, by using the following equation [2,8,9],…”

“…In order to obtain a high specific capacitance for a Co 3 O 4 thin film in a pseudocapacitor, various Co 3 O 4 nanostructures, e.g., nanotubes [3], nanowires [2], nanoparticles [8], and nanosheets [1] have been investigated. Recently, Qing et al synthesized a film of Co 3 O 4 nanoflowers on a Ni foam substrate by solvothermal method, and achieved a remarkably high specific capacitance of 1936.7 F g À1 [9] for its capacitor.…”