A μL-scale micromachined microbial fuel cell having high power density
A μL-scale micromachined microbial fuel cell having high power density
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DOI：
10.1039/c0lc00494d
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发表时间：
2011-01-01
期刊：
影响因子：
6.1
通讯作者：
Chae, Junseok
中科院分区：
文献类型：
--
作者：
Choi, Seokheun;Lee, Hyung-Sool;Chae, Junseok
我们报道了一种基于MEMS（微机电系统）的微生物燃料电池（MFC），产生高功率密度。MFC的特点是4.5 μ L的阳极/阴极室由20 μ m厚的光可定义的聚二甲基硅氧烷（PDMS）薄膜。MFC使用富含地细菌的混合细菌培养物，阳极呼吸细菌（ARB），其产生导电生物膜基质。MEMS MFC产生16000 μ A cm（-3）（33 μ A cm（-2））的最大电流密度和2300 μ W cm（-3）（4.7 μ W cm（-2））的功率密度，这两者都显著大于先前的MEMS MFC所实现的。MEMS MFC的库仑效率至少为31%，是迄今为止报道的MEMS MFC中的最高值。性能的改善来自于使用高效的ARB，最大限度地减少了氧气侵入阳极室的影响，具有大的比表面积，从而降低了内阻。
We report a MEMS (Micro-Electro-Mechanical Systems)-based microbial fuel cell (MFC) that produces a high power density. The MFC features 4.5-mu L anode/cathode chambers defined by 20-mu m-thick photo-definable polydimethylsiloxane (PDMS) films. The MFC uses a Geobacter-enriched mixed bacterial culture, anode-respiring bacteria (ARB) that produces a conductive biofilm matrix. The MEMS MFC generated a maximum current density of 16 000 mu A cm(-3) (33 mu A cm(-2)) and power density of 2300 mu W cm(-3) (4.7 mu W cm(-2)), both of which are substantially greater than achieved by previous MEMS MFCs. The coulombic efficiency of the MEMS MFC was at least 31%, by far the highest value among reported MEMS MFCs. The performance improvements came from using highly efficient ARB, minimizing the impact of oxygen intrusion to the anode chamber, having a large specific surface area that led to low internal resistance.