Improved microbial fuel cell performance by encapsulating microbial cells with a nickel-coated sponge
Improved microbial fuel cell performance by encapsulating microbial cells with a nickel-coated sponge
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通过用镀镍海绵封装微生物细胞来提高微生物燃料电池的性能
DOI：
10.1016/j.bios.2012.08.014
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发表时间：
2013-03-15
影响因子：
12.6
通讯作者：
Ding, Yi
中科院分区：
文献类型：
--
作者：
Liu, Xueying;Du, Xiaoyu;Ding, Yi
开发能够促进微生物生物膜形成、底物转移和电子转移的新型阳极材料对于提高微生物燃料电池（MFC）的性能至关重要。在这项工作中，镍涂层海绵作为一种新颖且廉价的具有开放三维大孔结构的材料，被用作封装微生物细胞的阳极。与平面碳纸相比，镍涂层海绵不仅提供了高表面积以促进微生物细胞的附着和定植，而且由于多重且高导电性的途径而支持足够的底物转移和电子转移。正如预期的那样，所得的镍涂层海绵生物膜在发电过程中表现出优异的电化学活性和功率输出稳定性。与之前报道的结果相比，镍涂层海绵生物膜实现了更高的最大功率密度（996 mW m(-2)）和更长、更稳定的发电周期。值得注意的是，阳极室中的化学需氧量（COD）去除率达到90.3％，这表明镀镍海绵是一种非常有前途的阳极材料，也是一种用于制造MFC的有效固定方法。 (C) 2012 Elsevier B.V. 保留所有权利。
Development of novel anodic materials that could facilitate microbial biofilm formation, substrate transfer, and electron transfer is vital to enhance the performance of microbial fuel cells (MFCs). In this work, nickel-coated sponge, as a novel and inexpensive material with an open three-dimensional macro-porous structure, was employed as an anode to encapsulate microbial cells. Compared with planar carbon paper, the nickel-coated sponge did not only offer a high surface area to facilitate microbial cells attachment and colonization but also supported sufficient substrate transfer and electron transfer due to multiplexed and highly conductive pathways. As expected, the resulting nickel-coated sponge biofilm demonstrated excellent electrochemical activity and power output stability during electricity generation processes. A higher maximum power density of 996 mW m(-2) and a longer, more stable electricity generation period were achieved with the nickel-coated sponge biofilm than previously reported results. Notably, chemical oxygen demand (COD) removal reached 90.3% in the anode chamber, suggesting that the nickel-coated sponge is a highly promising anodic material and an efficient immobilization method for the fabrication of MFCs. (C) 2012 Elsevier B.V. All rights reserved.