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通过向PEMFC阳极添加3种浓度(即50、200、500 mg/L)金属钙离子溶液,研究金属钙离子浓度对PEMFC性能的影响.实验结果表明,随着Ca2+浓度增加,燃料电池电压不断降低.在电流密度为500 mA/cm2,相同的污染时间9h的条件下,经50、200、500 mg/L Ca2+污染后的电池电压相对于未污染的电池电压分别降低了14％、29％、64％;燃料电池的最大功率密度随着金属Ca2+浓度的增加而降低,经50、200、500 mg/L Ca2+污染9h后的电池最大功率密度相对于未污染的电池最大功率密度分别降低了24％、33％、43％.电池经500 mg/L Ca2+污染6h,在500 mA/cm2电流密度下恒电流放电2h后,电池电压降低了58％.这些结果表明,Ca2+及其浓度对PEMFC的电化学性能有显著的影响.“,”The effect of the metallic calcium ion concentrations on the PEMFC performance was studied by adding the metallic calcium ion solutions with three kinds of concentrations (i.e.50,200 and 500 mg/L) into the anode of the PEMFC.The test results show that the voltage of PEMFC decreases gradually with the increase of Ca2+ concentration.Compared with voltage of the PEMFC without Ca2+ solution,under the identical current density of 500 rnA/cm2,the voltage of the PEMFC decrease 14％,29％ and 64％ for the Ca2+ contaminations with the corresponding calcium ion concentrations of 50,200 and 500 mg/L after the operating time of 9 hours,respectively.In addition,the maximum power density of the PEMFC decreases with the increase of Ca2+ concentration.Also compared with maximum power density of the PEMFC without Ca2+ solution,the maximum power density of PEMFC decrease 24％,33％ and 43％ for the Ca2+ contaminations with the corresponding calcium ion concentrations of 50 mg/L,200 mg/L and 500 mg/L after the operating time of 9 hours,respectively.After the solution with calcium ion concentration of 500 mg/L poured continuously into the anode for 6 hours,the voltage decreases 58％ under the constant discharging current density of 500 mA/cm2 for 2 hours.These results show that calcium ion and its concentration have a significant effect on the PEMFC performance.