Study of the Factors that Effect on the Power Storage and Generation of a Nano-Biomimetic Membrane Electrode-Assembling (NBMEA) for Battery/Fuel Cell Dual Applications

摘要

This report presents a study for factors that effect on the performance of the newly developed nanobiomimetic direct methanol fuel cell (NBDMFC). Membrane thickness and cell temperature effect on the Membrane Electrode Assembling (MEA) performance were studied. Results from six 0.5 cm2 single DMFC cells were presented. The cells measured a steady-state (s-s) discharge of 50 mA for 12 hrs at 25°C, 55°C and -20°C, respectively with the highest nominal voltage of 6.7V at 20°C. The highest power density at room temperature is 2.43 kW/kg with the energy density of 24 kWh/kg. All cell current density is 100 mA/cm~2 regardless of the change of temperature. The charge vs. discharge efficiency results are above 90%.