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微波污泥上清液为燃料的微生物燃料电池内阻分布

Keywords: 微生物燃料电池,污泥,内阻,微波

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Abstract:

实验采用单室无膜悬浮阴极微生物燃料电池(MFC),考察了微波污泥上清液为燃料的MFC(MSMFC)的内阻组成。研究表明,当未投加氯化钠时,MSMFC内阻为486.13Ω。当投加100mmol/L的氯化钠时,内阻迅速下降为207.18Ω。而投加量进一步增加时,内阻变化不明显。当阳极面积从4cm2增加到8cm2时,MSMFC内阻从387.34Ω迅速下降到293.96Ω。而当阳极面积增加到24cm2时,MSMFC内阻变化不明显。但当阳极面积增加到60cm2时,MSMFC内阻下降了38.4%。当阴极面积从24.87cm2增加到49.74cm2时,MSMFC内阻减少了40.4%(从545.72Ω减少到220.56Ω)。MSMFC中阳极内阻占主要部分,其次为阴极内阻,电解液电阻最小。随着阴阳极面积比的增加,阴阳极电阻比例减少,说明控制阴阳极面积比可以调整系统内阻的分配。

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