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稳恒磁场作用下微生物燃料电池的产电特性和电化学阻抗谱分析

Keywords: 微生物燃料电池,内阻,产电特性,稳恒磁场,电化学阻抗谱

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Abstract:

对混合菌接种的双室微生物燃料电池加载磁场强度为175mT的稳恒磁场,利用电化学交流阻抗等电化学分析方法,考察了在磁场作用下微生物燃料电池(MFC)产电性能的变化,分析了磁场对MFC各部分内阻的影响。加载磁场使已启动完成的MFC的产电明显增强,开路电压提高了10%。加载磁场后最大功率密度为2.08W/m2,大于加载前的1.58W/m2,表观内阻由170Ω降至80Ω。电化学阻抗谱分析确定了阳极、阴极和全电池的等效电路模型,拟合结果发现阳极极化内阻约为5Ω。加载磁场使MFC的阴极极化内阻由74.98Ω降至56.73Ω。

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