High performance g-C3N4 @NiMoO4/CoMoO4 electrode for supercapacitors

Facile-Synthesized Ni-Metal–Organic Framework/Nano Carbon Electrode Material for High-Performance Supercapacitors

“…The peaks at 862.25 and 880.05 eV are assigned to the two shake-up satellite peaks. In addition, the existence of Ni 2+ is proved by the binding energy difference of 17.77 eV between Ni 2p 1/2 and Ni 2p 2/3 . In the C 1s spectra (Figure c), the peak at 284.81 eV belongs to sp 3 C–C and 288.72 eV represents CO band. , In Figure d (the O 1 s spectra), the Ni–O band is revealed by the peak at 531.79 eV and the peak at 532.80 eV is originated from O element in PTA .…”

“…As shown in Figure c, the contribution of the diffusion-controlled process is weakened at a high scan rate due to the shortened time for ions to diffuse into the material . At the same time, the CV curve area and potential difference between the redox peaks get increased due to the polarization of the electrode Figure d shows that Ni-MOF/NC-10 possesses longer discharging time (496.4 s) than other samples [329.6 s (Ni-MOF/NC-0), 384.2 s (Ni-MOF/NC-5), and 372.4 s (Ni-MOF/NC-15)].…”

Preparation of porous CoMoO4+ NiMoO4nanosheets with high capacitance by a sol–gel method and freezing method

“…Under the current density of 5 A g À1 , the device was cycled 10 000 times, the specific capacitance reduced from 218 F g À1 to 213 F g À1 , and the specific capacitance retention rate was 97.7%. Finally, we compared the fabricated device with reference ones, [36][37][38][39] as shown in Fig. 11(f).…”

Mesoporous β-Ag2MoO4 nanopotatoes as supercapacitor electrodes

“…Electroanalytical techniques like cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) were adopted to investigate the supercapacitive behaviour of the prepared material in 2 M KOH solutions. The specific capacity of the silver molybdate electrodes was estimated from the CV and GCD test with the following equations 8 and 9, respectively, 50,68,74 𝑄 𝑠 = ∫ 𝐼𝑑𝑉 2𝑚 𝑒𝑙 𝑣 (7) 𝑄 𝑠 = 2𝐼 ∫ 𝑉𝑑𝑡 𝑚 𝑒𝑙 𝑉 (8) where QS is the specific capacity (C g -1 ); ∫ 𝐼 𝑑𝑉 is the area under the CV curve (A V); mel is the mass of the electroactive material loaded (g); V, potential window (V); ν, scan rate (mV s -1 ); I, specific current (A g -1 ) and∫ 𝑉 𝑑𝑡, area of the discharge curve (V s).…”

“…6 One of the key components to achieving outstanding charge storage performance in any energy storage device is electrode materials (both positive and negative). 7,8 Excellent electrode materials for energy storage devices are electroactive with efficient surface architectures, compatible electrochemical interaction with electrolyte, allowing binder-free fabrication of electrodes, high specific surface area, strong adherence to a current collector, and a good degree of porosity that facilitates the electron transport kinetics. As a result, a lot of research efforts have been directed to identify the materials, specifically for the negative electrodes, with the qualities mentioned above.…”