成果報告書詳細
管理番号20120000000645
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 定置用燃料電池システムの低コスト化のためのMEA高性能化
公開日2012/7/19
報告書年度2011 - 2011
委託先名パナソニック株式会社 東芝燃料電池システム株式会社 株式会社ENEOSセルテック JX日鉱日石エネルギー株式会社 東京瓦斯株式会社 旭化成イーマテリアルズ株式会社 旭硝子株式会社 日本ゴア株式会社 JSR株式会社 住友化学株式会社 東レ株式会社 学校法人大同学園 国立大学法人東京工業大学 国立大学法人山梨大学 国立大学法人北海道大学 国立大学法人筑波大学 独立行政法人産業技術総合研究所 出光興産株式会社 日揮ユニバーサル株式会社 国立大学法人東京大学 学校法人成蹊学園
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:
1.1 本プロジェクトの概要
平成27年頃以降の普及期に対応すべく最優先しなければならないシステムのコスト低減と性能、耐久性を主とする商品性を両立する革新的技術開発を目的とし、以下に示す4つのサブテーマに取り組む。各サブテーマを推進するに当たっては、サブテーマ毎にワーキンググループ(以下、WGと記載)を設定した。
英文要約Title: Strategic Development of PEFC Technologies for Practical Application/ Development of Fundamental Technology/ Performance Improvement of Membrane Electrode Assembly (MEA) of PEFC for Cost Reduction of Stationary Co-generation Systems (FY2010-FY2012)/ FY2011 Annual Report
Significant cost reduction is required for the full-fledged commercialization of residential PEFC co-generation systems. The objectives of this project are to develop the reliable and robust MEA components and sub-systems, which contribute to simplify the whole system with reduced cost. The final targets are: 1) To develop the polymer electrolytes which contribute to maintain 750mV under the conditions of high temperature (Tcell = 80-90°C) and low relative humidity (anode dew point Tda = 60°C with supplying dry air to the cathode) as that under the conventional conditions employed so far (Tcell = 80°C, Tda = Tdc = 65°C). 2) To develop highly CO-tolerant anode catalysts and the optimized operation conditions, resulting in the voltage loss < 20 mV operated with reformate containing 500 ppm CO. 3) To develop durable catalysts for the water-gas-shift reaction and the selective methanation of CO which can reduce the CO concentration below 500 ppm at the exit of the reformer to simplify the fuel processing system. 4) To develop the evaluation techniques for the prediction of the effects of impurities in the fuel or air on the cell voltages.
We have achieved the following results.
1) Electrolyte material suppliers have made notable progress in developing new polymer electrolytes, which can be operated at high temperature and low humidity conditions. We have also revised the test protocols for these electrolytes.
2) The catalyst development group has succeeded to produce new anode catalysts (Pt-Ru and Pt-Ru with rhodium porphyrin) having higher CO-tolerance than the conventional commercial one. The group has also analyzed CO-tolerant mechanism. MEAs prepared with these developed catalysts have been examined in long-term operation tests by the system makers. It was found that these MEAs exhibited lower voltage loss and higher durability.
3) We have prepared a reformer by using new catalysts for water-gas-shift reaction and selective methanation of CO. The reformer showed the target performance (CO concentration below 500 ppm at the exit of the reformer) under the condition from 35% to 100% load at the initial activity of the developed catalysts.
4) In order to develop evaluation techniques to predict influences of impurities on the cell voltage, we have conducted various operation tests. A numerical simulation model to predict a temporal degradation of cell performance due to impurities in air was developed, successfully showing good agreement with experimental results. The relationship between the surface coverage of impurities and catalytic activities toward the ORR was investigated quantitatively based on hydrodynamic voltammetry. It was revealed that the higher the coverage, the more sluggish the ORR kinetics, resulting in dominant two-electron reaction.
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