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首页> 外文期刊>Journal of Micromechanics and Microengineering >An autonomous CO2 discharge and electrolyte agitation scheme for portable microbial fuel cells
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An autonomous CO2 discharge and electrolyte agitation scheme for portable microbial fuel cells

机译：便携式微生物燃料电池的自主CO2排放和电解质搅拌方案

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摘要

We have successfully demonstrated a passive scheme that employs interfacial tensions to discharge a CO2 by-product out of portable microbial fuel cells (MFCs). The MFCs consume glucose to generate electricity and CO2 gas in a reaction catalyzed by encapsulated microorganisms. The bio-catalysts, fuels and electrolytes are sealed inside two liquid-impermeable compartments, which are separated by a proton exchange membrane. The discharge of unwanted CO2 bubbles from a closed anode compartment could result in desired agitation, which significantly facilitates the electron transport to the anode electrode. In our experiment, a MFC with a projected electrode area of 1 cm(2) and an overall size of 30 x 15 x 5 mm(3) was built. It was demonstrated that an open-circuit voltage of roughly 0.37 V per unit and a 1 h average power output up to 32 mu W cm(-2), which is five times a regular-sized MFC, were achieved by the proposed discharge and agitation mechanism. With 40 mg of glucose fuels, the miniature MFC continuously operated for up to 4 h. Furthermore, a fuel-cell plate of six units, which had an overall open-circuit voltage over 2 V, was built and successfully powered a light-emitting diode. As such, the proposed discharge and agitation mechanism could self-regulate the electricity harvesting inside a MFC and produce steady voltage and current outputs for portable applications.
机译：我们已经成功地证明了一种被动方案，该方案利用界面张力将CO2副产物从便携式微生物燃料电池（MFC）中排出。在被封装的微生物催化下，MFC消耗葡萄糖以产生电能和CO2气体。生物催化剂，燃料和电解质被密封在两个不透液的隔室中，该隔室由质子交换膜隔开。从封闭的阳极室中排出不需要的CO2气泡可能会导致所需的搅拌，从而显着促进电子向阳极的传输。在我们的实验中，构建了一个MFC，其投影电极面积为1 cm（2），总尺寸为30 x 15 x 5 mm（3）。结果表明，通过建议的放电和放电，可以实现大约0.37 V的开路电压和高达32μW cm（-2）的1 h平均功率输出，这是常规尺寸MFC的五倍。搅拌机制。使用40 mg葡萄糖燃料，微型MFC连续运行长达4小时。此外，制造了六个单元的燃料电池板，其总开路电压超过2 V，并成功地为发光二极管供电。因此，提出的放电和搅拌机制可以自我调节MFC内部的电能收集，并为便携式应用产生稳定的电压和电流输出。

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