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    High-efficiency catalyst for water splitting and supercapacitor applications: the promising role of Ni/PMAc-g-CNT
    (Springer Heidelberg, 2023) Caglar, Aykut; Kaya, Sefika; Avci Hansu, Tuelin; Akdemir, Murat; Demir Kivrak, Hilal; Horoz, Sabit; Kaya, Mustafa
    In this study, we investigated the use of electrocatalysts, PMAc, PMAc-g-CNT, Ni/PMAc, and Ni/PMAc-g-CNT for water splitting and supercapacitor applications. Our results showed that the Ni/PMAc-g-CNT catalyst exhibited superior properties in terms of electrochemical activity, stability, and energy storage capacity. The Tafel slope for OER was found to be 471.25 mV dec(-1), which was lower than other catalysts studied. The capacitance value of the Ni/PMAc-g-CNT catalyst was 35.23 F/g at 0.5 A/g current density, which was higher than the Ni/PMAc catalyst. These findings provide a novel and detailed insight into the performance of these catalysts and suggest that the Ni/PMAc-g-CNT catalyst is a promising material for both water splitting and supercapacitor applications.
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    Öğe
    Investigation of a New Supercapacitor Electrode Material from Prunus Spinosa Biomass
    (Springer, 2023) Avci Hansu, Tuelin; Hansu, Fevzi; Akdemir, Murat
    The systems like portable electronic devices, electric vehicles, and uninterrupted power applications demonstrate the necessity of energy storage recently. Thus the interest in supercapacitor technology, which is thought to be an alternative solution to traditional energy storage devices and provides great advantages in terms of preventing environmental pollution, is increasing day by day. In this study, Prunus spinosa seed waste biomass (PS) was converted to supercapacitor active material for the first time through the different activation processes. The surface characterizations of the obtained materials were performed by using Scanning Electron Microscopy with Energy-Dispersive X-Ray (SEM-EDX), BET, X-Ray Diffraction Analysis (XRD) and Fourier-Transform Infrared Spectroscopy (FTIR) analysis methods. Three different supercapacitor cells were designed in the scoops of the study. When activation with KOH was used in addition to carbonization, there was an increase in the surface area and pore volume of the material, and the capacitance value of the electrodes increased from 15.75 F/g to 48.63 F/g at 1.0 A/g. When the pure material activated with H2SO4, the capacitance increased to 39.92 F/g and a high energy density of 7.05 Wh/kg was obtained as the potential operating range of the electrodes increased. As the electrodes were charged or discharged, their coulombic efficiency increased and the PS-H2SO4 electrode presented an excellent coulombic efficiency. It is tought that the created electrodes promise great potential for the energy storage in terms of cost, efficiency, capacity, and stability.