The influences of polyethylene glycol and ethylene glycol on both specific capacitance and weight loss of the aluminum foil in the area enlarging corrosion procedure are investigated by the electrochemical technique and the weight loss measurement. The effect of temperature on this process is also studied. It is discovered that the optimal concentration of both additives in the etching solution is 0.4 g/L for polyethylene glycol and 0.8 g/L for ethylene glycol, and the specific capacitance of the obtained aluminum foils is corresponding to 372, 334 μF/cm2， respectively. Further experimental result shows that the most proper temperature is 25 ℃ for the capacitance expansion of aluminum foil with 0.4 g/L polyet hylene glycol or 0.8 g/L ethylene glycol, which can offer higher specific capacitance of 449, 489 μF/cm2, respectively.