On-line System Designing for Multi Function DMFCs

优先领域的研究项目D进行了几项与直接型燃料电池系统发展有关的研究。该小组还开发了各种测量系统和特殊分析方法，以支持其他研究项目，即与膜材料开发有关的研究项目A，与催化剂和电极材料研究有关的研究项目B，以及与膜和电极组装（MEA）优化研究有关的研究项目C。D项目的系统开发研究包括3个任务，即(1)开发乙醇燃料电池系统作为有毒的DMFC燃料系统的替代品，(2)使用碱性聚合物膜材料开发pefc，(3)使用微加工方法实现DMFC的小型化。(1)研究了一种直接乙醇燃料电池，研究了阳极反应的中间产物乙醛的行为。更多的分析有助于实现直接乙醇燃料电池（DEFCs）。(2)碱性燃料电池的优点是降低了阴极过电位，为不含贵金属的催化剂提供了适宜的条件。我们开发了一种碱性膜燃料电池。对电池进行了甲醇、乙醇、2-丙醇燃料的测试。电池的性能取决于燃料的pH值。改善碳颗粒的分散特性是碱性膜燃料电池的研究课题。(3)设计并制作了基于MEMS技术的新型微dmfc。采用选择性等离子体刻蚀法制备了电池内的气体通道。该技术减少了DMFC中组件的数量，降低了组装成本并减小了它们的尺寸。本课题组开发的利用聚焦离子束系统对MEA横截面进行TEM和SEM观察的方法，明确了MEA中电极与电解质膜之间的界面结构，有效地支持了优先领域的整个研究项目。少

The Research Project D in the Priority Area conducted several studies related to the system development of direct type fuel cells. This group also developed various measurement systems and special analytical methods, to support the other Research Projects, i.e., Research Project A relating to the development of membrane materials, Research Project B relating to the studies of catalyst and electrode materials, and Research Project C relating to the study on the optimization of membrane and electrode assembly (MEA).The system development studies in the Project D include 3 tasks, i.e., (1) development of an ethanol fuel cell system as an alternative to the toxic DMFC fuel system, (2) development of PEFCs using alkaline polymer membrane materials, and (3) miniaturization of DMFCs using micro fabrication method.(1) A direct ethanol fuel cell is studied and the behavior of the acetaldehyde which is an intermediate product in the anode reaction was investigated. The knowledge obtained in this … More analysis contributes to the realization of direct ethanol fuel cells (DEFCs).(2) Alkaline fuel cells have the advantages that they lower the cathode overpotential, and they provide conditions suitable for catalysts without precious metals. We developed a fuel cell with alkaline membrane. The cell was tested for methanol, ethanol, 2-propanol fuels. The performance of the cell depended on the pH of the fuels. The improvement of the dispersion characteristic of carbon particles was the issue of the alkaline membrane fuel cells.(3) Novel micro DMFCs based on MEMS technology were designed and fabricated. The selective plasma etching method was employed to fabricate the gas channels in the cell. This technology reduces the number of the components in a DMFC and reduces the assembly cost as well as reduces their sizes.The TEM and SEM observation method for the cross section of MEA using a focused ion beam system, which was developed in this group, clarified the structure of the interface between the electrode and electrolyte membrane in the MEAs, and effectively supported the whole research project in the Priority Area. Less