成果報告書詳細
管理番号20160000000165
タイトル*平成27年度中間年報 固体高分子形燃料電池利用高度化技術開発事業 普及拡大化基盤技術開発 セルスタックに関わる材料コンセプト創出(高出力・高耐久・高効率燃料電池材料のコンセプト創出)
公開日2016/12/23
報告書年度2015 - 2015
委託先名国立大学法人山梨大学 国立大学法人岩手大学 国立大学法人信州大学 国立大学法人東北大学 田中貴金属工業株式会社 株式会社カネカ パナソニック株式会社 株式会社日産アーク
プロジェクト番号P15001
部署名新エネルギー部
和文要約 
英文要約Title: Superlative, Stable, and Scalable Fuel Cell Project (FY2015-FY2017) FY2015 Annual Report

1) New concept of cathode catalysts ・ Contrary to the common view, Pt2 nm/C with uniform in Pt size were found to be quite durable, maintaining high ORR activity. ・ New Pt alloy catalysts with a stable Pt skin layer supported on carbon, Pt2AL-Pt-M/C (M = Fe, Co, Ni) exhibited both high ORR activity and high durability for accelerated tests simulating load changes at 65 °C. The Pt2AL-PtCo/C was found to exhibit very high tolerance to H2SO4 (a typical decomposition product from polymer electrolytes) at temperatures >70°C because the adsorption of sulfate anions was weakened. ・ We have succeeded in establishing the preparation methods of Pt2AL-PtCo/C catalysts with 15 g scale. ・ To increase the mass activity, we have succeeded in dispersing PtXCo alloys on Ta-SnO2 support with an aggregate structure. ・ To demonstrate the cathode catalyst concept with the catalyst layer of ultimate effectiveness, we have analyzed the microstructure and ionomer-coverage at several carbon-supported catalysts. 2) Development of new concept for ionomer materials ・ Novel hydrocarbon ionomers have been designed and synthesized. Aromatic polymer membranes composed of quinquephenylene as hydrophobic component and sulfonated phenylene as hydrophilic component exhibited high proton conductivity, low gas permeability, outstanding chemical stability, and good fuel cell performance. ・ The novel hydrocarbon ionomer membranes survived 5000 cycles in DOE humidity cycling test. Reinforcement with tailor-made glass fibers further improved the mechanical properties of the membranes. ・ The novel hydrocarbon ionomers were synthesized in a larger scale (> 10g). Good reproducibility was confirmed in the yield, purity, and properties of the membranes. ・ The novel hydrocarbon ionomers exhibited high mobility in organic solution, which might be beneficial for preparing well-dispersed catalyst ink.3) New concept of anode catalysts highly tolerant to impurities ・We, for the first time, found that the Pt2AL-PtCo/C exhibited superlative mass activity for the CO-tolerant hydrogen oxidation reaction (HOR) at 70 to 90°C, together with high robustness with respect to air exposure. A significant decrease in the adsorption energy of CO, as well as NH3, at Pt2AL-PtCo was demonstrated by a first-principle calculation. ・ Pt2Ru3 nanoparticles supported on mesoporous carbon, which was developed by the previous NEDO project, was analyzed by EXAFS at NEDO beam line in SPring-8. We found that the Pt2Ru3 was well-alloyed compared with a commercial catalyst. It was suggested that CO adsorption could accelerate the rearrangement of surface atoms. ・ We, for the first time, found that a new catalyst consisting of Ru nanosheets with 1.5-monolayers of Pt exhibited high mass activity for the CO-tolerant HOR together with high durability against potential step cycling in CO-containing solution.
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