基于木薯秸秆制备三维多孔碳及其在微生物燃料电池中的应用

发布时间：2018-01-19 07:19

  本文关键词： 三维 多孔 碳材料 阳极 微生物燃料电池　出处：《化工进展》2017年10期 　论文类型：期刊论文

【摘要】：微生物燃料电池是一种可以从污水中直接回收能量的新型装置。然而,相对低的输出功率密度严重限制了它的应用。阳极材料对于提高其功率密度和能量转换效率至关重要。本文利用一步碳化法基于农业废弃物木薯秸秆制备了先进的三维多孔碳阳极,用扫描电子显微镜观察了所制备的材料的形貌,发现其内部呈现天然筛管式大孔结构,可有利于增大阳极生物负载量和优化传质作用。利用交流阻抗谱、循环伏安技术以及双室微生物燃料电池结构研究了材料的电化学性能,结果发现,800℃下碳化得到的三维多孔碳具有最优的电化学活性和最佳功率输出,其最大功率密度高达73.0W/m~3,是商业碳纸的3.7倍。此研究为构筑高效生物化学体系电极材料提供了新思路和新方法。
[Abstract]:Microbial fuel cells are a new type of device that can recover energy directly from sewage. The relatively low output power density seriously limits its application. Anode material is very important to improve its power density and energy conversion efficiency. In this paper, a one-step carbonization method was used to prepare cassava straw from agricultural waste. Three dimensional porous carbon anode. The morphology of the prepared materials was observed by scanning electron microscope (SEM). It was found that the internal structure of the material was natural sieve tube macroporous structure, which could increase the amount of biological load of anode and optimize mass transfer. The electrochemical properties of the materials were studied by cyclic voltammetry and two-chamber microbial fuel cell structure. The results showed that the three-dimensional porous carbon obtained by carbonization at 800 鈩，

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