KOH活化活性炭提升辊压空气阴极微生物燃料电池性能  

Enhanced performance of rolling pressed activated carbon air cathode by KOH activation in microbial fuel cells

作　　者：李骏辉 王鑫[1] 周乐安 安敬昆 李田 武佳丽 钱亚薇 周启星[1] LI Junhui WANG Xin ZHOU Le＇an AN Jingkun LI Tian WU Jiali QIAN Yawei ZHOU Qixing(Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University,Tianjin 300350, Chin)

机构地区：[1]南开大学环境科学与工程学院环境污染过程与基准教育部重点实验室,天津300350

出　　处：《环境工程学报》2017年第10期5387-5392,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上项目(21577068)

摘　　要：目前阴极性能是限制微生物燃料电池(microbial fuel cell,MFC)输出功率的主要瓶颈。为进一步提高MFC的性能,利用固体KOH在400~800℃下对活性炭活化并将其制成辊压空气阴极。最终筛选出碱炭比1∶1,活化温度500℃样品AC-500为最佳处理条件。以乙酸钠为底物,MFC最高功率密度为1 894 mW·m^(-2),比未处理AC(1 481 mW·m^(-2))提高了28%。活性炭经过熔融KOH的刻蚀活化,孔径分布和表面元素发生变化可能促进了阴极内部的传质过程,提高了空气阴极的催化性能。The performance of the cathode is the main bottle neck limiting the power output of microbial fuel cells （MFCs）.To further improve the performance of MFCs,solid KOH powder was utilized to treat activated carbon powder at 400 to 800 ℃,and these treated activated carbon powders were further roll-pressed as different air-cathodes.Finally,the optimized KOH to carbon mass ratio was 1 ∶ 1,and the optimized treating temperature was 500 ℃ （AC-500）.The maximum power density reached 1 894 m W·m^-2 when acetate was used as the substrate,which was 28% higher than the untreated AC （1 481 mW·m^-2.Molten KOH etching changed both the pore size distribution and surface element of activated carbon,which may promote the cathode internal mass transfer and improve the power output.

关 键 词：氢氧化钾活化 辊压活性炭空气阴极 微生物燃料电池 

分 类 号：X382[环境科学与工程—环境工程]