Abstract

The electrogenic properties of plant–microbial fuel cells (P-MFCs) assembled into a battery are studied. The operation of a single cell is studied experimentally in comparison with parallel and series connections of cells, which are two options for connection in an electrical circuit. A potential difference of ~70 mV, which gradually vanishes, is registered in a P-MFC that does not include a plant organism. We hypothesize that the root system, with involvement of electrogenic chemoorganotrophic microorganisms, gives rise to diffusional electromotive force. We show that in series connection of three fuel cells the bioelectric potential generated by an individual cell, which is 170 mV, increases only by a factor of 1.5. In parallel connection of three cells, the current produced under a load increases, but also only by a factor of 1.5, and this takes place at later developmental stages of the plants, which is presumably caused by triggering certain compensatory mechanisms that diminish the electrogenic properties of the plants.

中文翻译：

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串联和并联连接的植物-微生物燃料电池的电发生

摘要

研究了组装成电池的植物微生物燃料电池（P-MFC）的电学特性。与电池的并联和串联连接相比较，对单个电池的操作进行了实验研究，这是电路中连接的两种选择。在不包含植物生物的P-MFC中记录了约70 mV的电位差，该电位差逐渐消失。我们假设根系，与电化化学有机营养微生物的参与，会引起扩散电动势。我们显示，在三个燃料电池的串联连接中，单个电池产生的生物电势为170 mV，仅增加了1.5倍。在并联连接三个电池时，负载下产生的电流增加，但也仅增加1.5倍，