成果報告書詳細
管理番号20120000000649
タイトル*平成23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2012/7/26
報告書年度2011 - 2011
委託先名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 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
プロジェクト番号P10001
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
(1)研究開発の目的
固体高分子形燃料電池(以下燃料電池)の市場化において、定置型燃料電池システム(エネファーム)については既に販売が始められており、その販売数量は順調に伸びている。燃料電池自動車についても2015年に上市開始が予定されている。一方、これからの本格的普及には燃料電池システムの大幅なコスト低減が大きな課題となっている。
燃料電池システムを大幅に低コスト化するためには、量産効果に加えて新規材料や新規膜電極接合体(以下MEA)構造等の技術開発が必要である。しかしながら、現状ではMEA内部の構造の特異性から、形態・機能の特性を的確に計量する手段は少なく、MEA内部での反応や劣化等のメカニズム理解が不足しているため、新規材料や新規MEA構造等の開発が困難となっている。
本事業においては、MEA内部の形態・機能の特性を的確に計測・解析する手法を開発するとともに、MEA材料の構造・反応・物質移動現象解明を通じて、反応現象、移動現象の主要支配因子を明らかにすることにより、燃料電池の本格普及に向けて産業界の技術開発加速に資する材料および構造の設計指針を提案することを目的とし、課題である分極等の計測・解析に係る技術の開発を進めている。
英文要約Title: Analysis of Morphology, Reaction Mechanism, and Mass Transfer Phenomena for MEA Materials (FY2010-FY2012) FY2011 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"; Micro and meso-scale observation methods of morphologies and measurement methods of gas permeation and proton conduction thorough the electrolyte materials were progressed. Especially, by utilizing the AFM, NMR, IR, etc. it is clarified that the microstructure of electrolyte in catalyst layer is strongly affected by the substrate material and the thickness of the electrolyte. It is also clarified that the proton conduction mainly depends on the network of the channel under dry condition. In addition, by utilizing simulation technology, morphology of water in dry condition was clarified and water diffusion constants were quantitatively calculated. 2) Research field of "electrode-reaction"; The behavior of OH group and several anion adsorptions on cathode catalysts were analyzed by using numerical simulation under controlled potentials. For experimental verification of this method, the surface enhanced IR spectroscopy has been developed and some behaviors are clarified. For analysis of fine structure and electronic state of electrode-catalyst in real time observation, Time- and Space-resolved XAFS system has been developing. A new beam-line named as "Advanced Beam Line for Real Time Measurement Catalyst Structure and Reaction Dynamics" at SPring-8. The construction process is on going as planed. Also by utilizing current XAFS technology, some of the oxygen reduction reaction parameters on Pt alloy were analyzed and local and micro-structure were clarified. The development of in-situ PEEM was progressed and 300nm resolution was realized. As model materials, it is newly observed that surface modified catalysts shows better ORR performance. 3) Research field of "materials transportation in the catalyst layer"; By multi-scale MD simulation, oxygen permeation process thorough ionomer film on Pt particle was analyzed and the mechanism of this property was proposed. The resistance of water movement in nano-pore was also analyzed. Effective thermal conductivity of the catalyst layer has been measured and the oxygen reduction reaction has been analyzed. Liquid water behavior in catalyst layer was investigated by using soft X-ray radiograph for mesoscopic scale and water morphology by small angle neutron scattering method for microscopic scale. The reproducibility of parameter-controlled MEA was improved and the MEAs have been started to deliver to the other groups.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る