Treatment of carbon fiber brush anodes for improving power generation in air-cathode microbial fuel cells
Treatment of carbon fiber brush anodes for improving power generation in air-cathode microbial fuel cells
复制标题
处理碳纤维刷阳极以提高空气阴极微生物燃料电池的发电能力
DOI：
10.1016/j.jpowsour.2009.10.030
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发表时间：
2010-04-02
影响因子：
9.2
通讯作者：
Logan, Bruce E.
中科院分区：
文献类型：
--
作者：
Feng, Yujie;Yang, Qiao;Logan, Bruce E.
碳刷电极已被用于为微生物燃料电池（MFC）中的细菌生长提供高表面积和高功率密度。高温氨气处理已被用于提高发电，但在实践中需要较少的能量密集型方法来处理这些电极。三种不同的处理方法，以提高发电的碳纤维刷：酸浸泡（CF-A）。加热（CF-H）和两种方法的组合（CF-AH）。组合的热和酸处理将功率产生提高到1370 mW m（-2），这比未处理的对照（CF-C，1020 mW m（-2））大34%。该功率密度比仅使用酸处理（1100 mW m（-2））高25%，比仅使用热处理（1280 mW m（-2））高7%。XPS分析的处理和未处理的阳极材料表明，功率的增加与较高的N1s/C1 s比和较低的C-O组成。这些发现证明了使用石墨纤维刷提高发电效率的有效和简单的方法，并提供了提高性能的原因，这可能有助于通过其他石墨纤维改性进一步提高功率。(C)2009 Elsevier B. V.保留所有权利。
Carbon brush electrodes have been used to provide high surface areas for bacterial growth and high power densities in microbial fuel cells (MFCs). A high-temperature ammonia gas treatment has been used to enhance power generation, but less energy-intensive methods are needed for treating these electrodes in practice. Three different treatment methods are examined here for enhancing power generation of carbon fiber brushes: acid soaking (CF-A). heating (CF-H), and a combination of both processes (CF-AH). The combined heat and acid treatment improve power production to 1370 mW m(-2), which is 34% larger than the untreated control (CF-C, 1020 mWm(-2)). This power density is 25% higher than using only acid treatment (1100 mWm(-2)) and 7% higher than that using only heat treatment (1280 mW m(-2)). XPS analysis of the treated and untreated anode materials indicates that power increases are related to higher N1s/C1s ratios and a lower C-O composition. These findings demonstrate efficient and simple methods for improving power generation using graphite fiber brushes, and provide insight into reasons for improving performance that may help to further increase power through other graphite fiber modifications. (C) 2009 Elsevier B.V. All rights reserved.