Novel Gas Diffusion Cloth Bioanodes for High-Performance Methane-Powered Microbial Fuel Cells
Novel Gas Diffusion Cloth Bioanodes for High-Performance Methane-Powered Microbial Fuel Cells
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用于高性能甲烷驱动微生物燃料电池的新型气体扩散布生物阳极
DOI：
10.1021/acs.est.8b04311
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发表时间：
2019
影响因子：
11.4
通讯作者：
Zhou Shungui
中科院分区：
文献类型：
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作者：
Yu Linpeng;Yang Zujie;He Quxiang;Zeng Raymond J;Bai Yanan;Zhou Shungui
微生物燃料电池是一种将化学能转化为电能的新型技术。然而，到目前为止，只有少数MFC由气体燃料（例如甲烷）提供动力，并且它们有限的性能仍然受到气体的低溶解度和生物利用度的挑战。在这里，我们开发了一种气体扩散布（GDC）阳极，以显着提高甲烷为动力的MFC的性能。GDC阳极通过在防水GORE-TEX布上简单地一步涂覆导电碳布来构造。生物膜富集后，GDC阳极获得了甲烷依赖的电流高达1130.2 mA m-2，这是165.2倍高于传统的碳布（CC）阳极。此外，配备GDC阳极的MFC产生的最大功率密度为419.5 mW m-2。Illumina高通量测序结果显示，GDC阳极生物膜中主要由Geolecules构成，而甲烷菌在厌氧细胞中含量最高。假设甲烷细菌通过将电子转移到阳极来逆转甲烷生成过程，而地细菌通过中间体（例如，乙酸盐）的厌氧甲烷氧化。总体而言，这项工作提供了一个有效的路线，在制备简便和成本效益高的阳极，高性能甲烷MFC。
Microbial fuel cells (MFCs) are a promising technology that converts chemical energy into electricity. However, up to now only few MFCs have been powered by gas fuels, such as methane, and their limited performance is still challenged by the low solubility and bioavailability of gases. Here, we developed a gas diffusion cloth (GDC) anode to significantly enhance the performance of methane-powered MFCs. The GDC anode was constructed by simply coating waterproof GORE-TEX cloth with conductive carbon cloth in one step. After biofilm enrichment, the GDC anodes obtained a methane-dependent current up to 1130.2 mA m–2, which was 165.2 times higher than conventional carbon cloth (CC) anodes. Moreover, MFCs equipped with GDC anodes generated a maximum power density of 419.5 mW m–2. Illumina high-throughput sequencing revealed that the GDC anode biofilm was dominated mainly byGeobacter, in contrast with the most abundantMethanobacteriumin planktonic cells. It is hypothesized thatMethanobacteriumreversed the methanogenesis process by transferring electrons to the anodes, andGeobactergenerated electricity via the intermediates (e.g., acetate) of anaerobic methane oxidation. Overall, this work provides an effective route in preparing facile and cost-effective anodes for high-performance methane MFCs.