(546b) Inorganic-Organic Composite Electrodes for Supercapacitor Application
AIChE Annual Meeting
Friday, November 20, 2020 - 8:15am to 8:30am
Nickel cobaltite composite electrodes were fabricated by a fast, scalable, and cost-effective electrophoretic deposition for supercapacitor applications. NiCo2O4/PANI/rGO composite electrode went through heat treatment under nitrogen to carbonize PANI after electrophoretic deposition. NiCo2O4 platelets, distributed on carbonized polyanilineârGO network, were active in charge storage with high capacitance, excellent rate capability (1235 F gâ1 at 60 A gâ1), and acceptable cycling stability (3000 cycles at 10 A gâ1) in a three-electrode assembly. The practical application of the composite electrode was investigated by an all-solid-state asymmetric supercapacitor cell using NiCo2O4/C-PANI/rGO as the cathode and activated carbon as the anode with specific capacitance of 262.5 F gâ1 at 1 A gâ1 and a good capacitance retention of 78% after 3500 cycles at an expanded working potential of 1.5 V. This work shows the importance of the composite assembly process that governs the microstructure of the composite. In addition, the effect of oxide pore tuning on charge storage is investigated.