Effects of Li4Ti5O12 Anode Electrode Thickness on the Cell Balancing of Hybrid Super Capacitor

The hybrid super capacitor was prepared by controlling the anode electrode thickness to optimize cell balancing. With an increasing anode electrode thickness, the internal resistance increased, while the capacitance was not changed remarkably. The potential of the cathode increased and that of the anode was decreased with the working voltage. However, the potential variation of the cathode was larger than that of the anode due to the difference in the reaction mechanism of the cathode and anode. The discharge capacity retention as a function of the current rates increased and the cycle performance was improved with an increasing anode electrode thickness. The effects of the anode electrode thickness on the electrode potential are also discussed.