成果報告書詳細
管理番号20140000000143
タイトル*平成25年度中間年報 固体酸化物形燃料電池等実用化推進技術開発 固体酸化物形燃料電池の耐久性迅速評価方法に関する基礎研究
公開日2014/5/2
報告書年度2013 - 2013
委託先名独立行政法人産業技術総合研究所 一般財団法人電力中央研究所 TOTO株式会社 日本特殊陶業株式会社 日本ガイシ株式会社 株式会社村田製作所 国立大学法人九州大学 国立大学法人京都大学 国立大学法人東北大学 国立大学法人東京大学
プロジェクト番号P13001
部署名新エネルギー部
和文要約
英文要約Title: Technology development for SOFC commercialization promotion. Basic study on rapid evaluation method of SOFC durability (FY2013-FY2015) FY2013 Annual Report

In the first year of the three-year project on the durability of SOFC stacks, durability tests were made on three different stack groups. The first one consists of flatten tubular cells made by Kyocera and operated by Osaka gas and by JX Nippon Oil and Energy and also of segment-in-series cells made by MHPS (Mitsubishi Hitachi Power Systems; previously MHI until January 2014); new series of long-term operation (20,000 h) started, whereas detailed analyses have started on available cells already tested a long period of time. The second type is of small tubular cells made by TOTO; the long term durability test started in CRIEPI, while thermal cycle tests started in Tokyo gas and related mandatory degradation test started in Kyushu Univ. with a focus on the chromium poisoning. The third group consists of planar cells made by NGK Spark Plug, segment-in-series cells on flatten tubes made by NGK insulator, and co-fired cells made by Murata manufacturing. Those three stacks have recently joined the NEDO project on cooperation with fundamental institutes so that analyses were first made on those stacks operated for 1000-2000 h by their own efforts. This aims at extracting the degradation phenomena causing the initial loss in the order of several 1000 h. In addition to this, CRIEPI started to make detailed analyses on cell/stack performance by changing gaseous compositions in anode and cathode to establish the representation scheme for respective stacks. The initially degraded cell components were first examined with SIMS by AIST and then with S-TEM by Kyushu Univ. Kyoto Univ. and Univ. of Tokyo started the examination with FIB-SEM while Tohoku University made analyses on mechanical stability for respective stacks. Those analyses will be made to clarify the degradation mechanism in a rapid manner. To shorten a period of time necessary to identify the degradation sources, considerations will be made on plausible mechanisms on the basis of accumulated knowledge on stack behaviors associated with important aspects of stack technologies such as utilization of metal interconnect, sealing materials or adoption of burning of remaining fuels just outside cells etc. Simulation started on respective topics in Univ. of Tokyo, Kyoto Univ., Tohoku Univ. and AIST. Between AIST and Tohoku Univ., cooperation is under way on the derivation of oxygen potential distribution and its utilization. Those simulation work will provide bases of understanding sequential changes in degradation as a function of time or interactions among different degradation phenomena occurring within the same stacks.
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