成果報告書詳細
管理番号20130000000554
タイトル*平成24年度中間年報 固体高分子形燃料電池実用化推進技術開発 基盤技術開発 MEA材料の構造・反応・物質移動解析
公開日2014/5/9
報告書年度2012 - 2012
委託先名技術研究組合FCーCubic 大学共同利用機関法人自然科学研究機構分子科学研究所 国立大学法人電気通信大学 国立大学法人北海道大学 国立大学法人北陸先端科学技術大学院大学 国立大学法人京都大学 国立大学法人東京工業大学 国立大学法人東北大学流体科学研究所 国立大学法人東京大学 学校法人上智学院 独立行政法人日本原子力研究開発機構
プロジェクト番号P1000
部署名新エネルギー部
和文要約
英文要約Title: Analysis of Morphology, Reaction Mechanism, and Mass Transfer Phenomena for MEA Materials (FY2010-FY2015) FY2012 Annual Report.

The objective of this project is to clarify the rate determining parameters for reactions and mass transfer phenomena in MEA which contribute the development of new materials and simplifications of fuel cell system. The target is to develop the analytical and measurement methods about the morphologies and properties of materials in MEA of PEFC.   
1) Research field of "electrolytes";
The analysis and measurement methods for mobility of water, configuration of water molecule and proton conduction pass through the electrolyte material were progressed. The main tools are such as numerical simulation, NMR, IR, SANS etc. It is clarified that the connectivity of water cluster is the most important factor to control the proton conductivity. Development for degradation analysis tool by utilizing numerical simulation was also progressed. The model ionomer, which has a superior reproducibility and the world’s highest level proton conductivity under dry condition, was successfully developed.
2) Research field of "electrode-reaction";
A new bean-line of measurement XAFS specialized for PEFC analysis at SPring-8 was constructed and the world’s highest performance was partly confirmed. Laminography XAFS, total reflection XAFS, HAXPES and PEEM were developed. The numerical simulation method to clarify electron transfer process and reaction intermediate under controlled potential and analytical method for time resolved reaction process based on vibration spectroscopy have been developed. By utilizing these technologies, the effects of surface pit and adsorption of ionomer on electrochemical reaction were analyzed. It is also clarified that the surface modification on Pt particles makes a positive impact on ORR.
3) Research field of "materials transportation in the catalyst layer";
The experimental measurement methods for resistance of oxygen and proton transport, water distribution and thermal/electrical resistivity were progressed.
Especially, the development for X-ray radiography achieved micro-meter level of space resolution, and the quantitative evaluation of liquid water distribution in MEA became possible. By utilizing these technologies, it is identified that in case of lower Pt loading, oxygen permeation in catalyst layer is the most important factor. Meanwhile, based on the development of numerical simulation, the clarification for the various phenomena such as oxygen permeation through meso porous structure and phase change of water in nano pore of catalyst support was succeeded. In addition, a good prospect is now seen in an integrated modeling considering thermal/electrical conduction.
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