Akademik Veri Yönetim Sistemi
Journal of Electroanalytical Chemistry, cilt.970, 2024 (SCI-Expanded)
Supercapacitors have attracted attention due to their high-power density, exceptional cycle stability and cost-effectiveness, which are superior to other electrochemical energy storage materials. In this study, the preparation of mesoporous CuCo2O4@rGO nanomaterials was achieved using a step-wise method that includes the temperature annealing of the CoCu-LDH@rGO precursors derived from ZIF-67@GO. At 4.1 % graphene concentration, the composite named CuCo2O4@40-rGO exhibited the best performance among the CuCo2O4@rGO composites. A specific capacity of 762 F/g (381 C/g) was recorded at a current density of 0.5 A/g, an excellent rate performance of 71.6 %, revealing excellent capacitive performance and reversibility. Moreover, the electrochemical performance of CuCo2O4@40-rGO was evaluated as a cathodic electrode and biomass derived activated carbon (AC) as a negative electrode. The hybrid supercapacitor device showed an energy density of 20.7 Wh/kg at a power density of 0.43 kW/kg with a working potential window of 0–1.7 V, as well as 98.8 % capacity preservation over 10,000 cycles. The step-wise synthetic approach proves to be both convenient and economically efficient, offering potential applicability to producing bimetallic oxides and their corresponding graphene composites, which exhibit excellent electrochemical properties.