本文对以100 Ω外阻启动完成后的微生物燃料电池施加18 mA的反极电流,考察不同施加时长的反极电流条件下电池的性能响应.实验结果表明:随着施加反极电流时间的增加,MFC最大功率密度呈逐渐减小的趋势.当反极电流施加时间大于12 h时,电池最大功率密度接近零.当电池恢复运行6天后,反极电流时间为10 min的MFC性能可以恢复至未施加反极电流前的水平.而对于施加反极电流大于1h的MFC,其性能仅能恢复至原性能的85％.循环伏安和生物膜干重测量结果显示,造成上述现象的原因主要是由于当施加的反极电流时间大于1h时,阳极生物膜活性略下降且生物膜干重减少所致.
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