A micro-sized microbial solar cell

The 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS) Pub Date : 2014-04-13 DOI:10.1109/NEMS.2014.6908805

Sanghyeon Yoon, Hankeun Lee, A. Fraiwan, C. Dai, Seokheun Choi

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Abstract

We report a micro-sized microbial solar cell (MSC) that can produce sustainable energy through photosynthetic reactions of cyanobacteria, Synechocystis PCC 6803 in the anode. The MSC has 57-μL anode/cathode chambers defined by laser-machined poly(methyl methacrylate) (PMMA) substrates. We obtained a maximum power density of 7.09 nW/cm2 which is one hundred seventy times more power than previously reported MEMS MSCs. The importance of the light intensity was demonstrated by the higher values of generated current during daytimes than those through the nights, indicating light-dependent photosynthetic processes. Considering that sunlight offers an unlimited source of energy, development of self-sustainable MSCs that rely on light as an energy source will become an increasingly important area of research in the future. In accordance with the MSC, we developed a photosynthetic cathode-based microbial fuel cell (MFC) showing that the use of cyanobacteria can be useful as well as efficient and sustainable catalysts for the cathode since they act as oxygenators.

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微型微生物太阳能电池

我们报道了一种微型微生物太阳能电池(MSC)，它可以通过蓝藻的光合作用产生可持续的能量，synnechocystis PCC 6803在阳极。MSC具有57 μ l的阳极/阴极腔，由激光加工的聚甲基丙烯酸甲酯(PMMA)衬底定义。我们获得的最大功率密度为7.09 nW/cm2，是先前报道的MEMS MSCs功率的170倍。光强的重要性体现在白天产生的电流比夜晚产生的电流高，表明光合作用过程依赖于光。考虑到阳光提供了无限的能源，开发以光为能源的自我可持续的间充质干细胞将成为未来越来越重要的研究领域。根据MSC，我们开发了一种基于光合作用阴极的微生物燃料电池(MFC)，表明蓝藻可以作为阴极的有效和可持续的催化剂，因为它们可以作为氧合器。

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The 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

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