成果報告書詳細
管理番号20130000000232
タイトル*平成22年度中間年報 新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(燃料電池・蓄電池) 高効率リバーシブル燃料電池(SORC)の開発
公開日2013/6/22
報告書年度2010 - 2010
委託先名株式会社デンケン 国立大学法人九州大学 国立大学法人横浜国立大学
プロジェクト番号P10020
部署名技術開発推進部
和文要約
英文要約Title:New Energy Technology Research Development/ New Energy Venture Business Technology Innovation Program (Fuel Cells and Batteries)/The development of the high efficiency reversible fuel cell (SORC)(FY2010-FY2011)FY2010 Annual report

I)The development of the electrode materials of the reversible cell (a)The optimization of materials in the reversible operation Objective of this part is to develop a new active catalyst in fuel cell and electrolyzer mode. The aimed values are overpotential for fuel and air electrode smaller than 130 mV and 70 mV at 100 mA/cm2. In the previous study, we generally used Ni-Fe metal for anode, and in this study, we examined the several Ni-Fe/oxide ion conducting composite oxide for electrode. It was found that Ni-Fe/SDC show the small overpotential for SOFC anode as well as SOEC cathode at 600-800℃. Therefore, among the examined composite anode, Ni-Fe/SDC seems to be the most active and suitable for SORC system. On the other hand, in case of air electrode, we examined the several oxides and oxide composites and it was found that Ba(La)CoO3 shows the smallest overpotential that is smaller than 60 mV at 100 mA/cm2 for SOFC and SOEC. Therefore, we achieved the objective value. (b)The performance evaluation of the reversible cell and operating condition optimization The objective of this part is to achieve 50 cycles reversible operation. Since we developed Ni-Fe/SDC, highly active for SOFC and SOEC, cycle operation of SOFC and SOEC was studied and it was found that cell stably operated over 50 cycles. (c)A design of the reversible cell structure and trial manufacture In order to show the concept of SORC, we aimed to develop a 100 W class small stack of SORC. For the first step, we developed single cell equipped in the stack container and at 800 ℃, the cell develop shows the almost theoretical OCV and 0.6 W/cm2 in SOFC mode. This result suggests that reasonable tight gas seal and high power density is achieved. On the other hand, for SOEC mode, we observed the H2 formation rate which is corresponded to the Faradays' law. II)The development of the thermoelectric material for heat recovery from SORC. In order to increase the energy conversion efficiency, we will apply the thermoelectric device with the developed SORC cell, however, conversion efficiency of the current thermoelectric device is low. In this study, by controlling the metallurgical structure, the thermoelectric materials with high dimensionless figure-of-merit (ZT) will be developed. We mainly focuse SiGe system for intermediate temperature theomoelectric device and SiGe with dendrite structure was studied. By using the electromagnetic levitation method, p-Si0.2Ge0.8 with dendrite structure was successfully prepared and the obtained the SiGe sample showed ZT value was 0.77 at 1000K, although the maximum ZT was 0.5 in the previous report. n-Si0.7Ge0.3 with dendrite structure was successfully prepared by unidirectional solidification in microgravity and the ZT at 1000K of the sample was 1.627 at 1000K, although the maximum ZT was 0.75 in the previous report. III)Trial manufacture and the evaluation of the bench model system Objective of this study is to manufacture the stack of the 100W class for fuel cell output and achieve 0.1W/cm2(SOFC) and hydrogen production rate of 100μmol・min-1・cm-2 (SOEC). Making a small size stack is now under study and the results will be obtained soon. Since we have already developed the single cell structure, stacking will be completed soon. IV)The setting of the business plan Objective : Concrete business plan for the industrialization. We surveyed customers and met technicians in several companies which show interest on our SORC technology. In particularly, we exchange idea and opinion with company on SORC.
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