成果報告書詳細
管理番号20130000000230
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) 中温作動型全固体燃料電池の技術開発
公開日2013/6/22
報告書年度2010 - 2010
委託先名株式会社ナノメンブレン
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 Venture Business Technology Innovation Program/ New Energy Venture Business Technology Innovation Program (Fuel Cells and Batteries)/ Technical Development of Intermediate-Temperature, All-Solid Fuel Cell (FY2010-FY2011) FY2010 Annual Report

1. Object Currently-commercialized models of polymer electrolyte FC (PEFC) and solid oxide FC (SOFC) cannot be relieved with technical problems derived from their operation temperatures. All-solid, intermediate-temperature (200-400degrees Celsius) FC's should be effective for solving these problems. In this project, we employ proton-conducting solid-acid nanometer-thick membranes (NM) in combination with precise electrodes to obtain novel intermediate-temperature FC. 2. Results 1. Method of MEA Fabrication A nanoMEA fabrication process was developed to provide integration of thin-film electrode and NM (5 cm×cm ). For this purpose, precursor mixtures of aluminosilicate and zirconium phosphate were applied to the surface of Pd foil and nano-carbon films to obtain uniform, defect-free NM of ca. 100-nm thickness. The electrochemical impedance spectroscopy (EIS) at 200-400degrees Celsius indicated that electrode and electrolyte membrane were tightly bound. Larger-area NM (25 cm×cm, 5 cm × 5 cm) was similarly fabricated to give uniform, defect-free electrolyte membrane with satisfactory electrical connection with solid electrode. 2. Durability of Electrolyte Nano-membrane and Characterization of NanoMEA Long-term stability of the NM (5 cm×cm) at 300degrees Celsius for 400 hr was confirmed. Repeated EIS measurement gave a constant area-specific resistance. The identical morphology before and after the thermal treatment was confirmed. FC single cells were constructed from nanoMEA's of thin films of Pd or carbon materials, and electricity generation was tested at intermediate temperature by using hydrogen gas. The resulting open circuit voltage was close to the theoretical value of ca. 1.0 V, showing the absence of cross-over of fuel gas and oxygen gas. However, the porous alumina support of nanoMEA tend to break readily during the test, and we could not confirm the target capacity of 0.1 W/(cm×cm). Other porous supports are in hand, and the experiments are being continued. 3. Examination of FC Components Currently-available components for PEFC and SOFC were examined for their use in the nanoMEA. Gas sealing in the FC set-up was satisfactory with a vermiculite seal that is being used for SOFC. Physically stable assembly of these components and nanoMEA was possible. 4. Construction of FC Test Apparatuses Single-cell test apparatus was improved by adopting a new set-up. Based on such experience, we designed FC apparatus for larger nanoMEA (25 cm×cm), and is currently testing. 5. Business Plan In order to evaluate the advantage of our system, we analyzed market information and related literatures, and concluded that this type of FC would find wide applications. As a focused product, a preliminary design of 1-kW portable power supply with methanol fuel was conducted. Its commercial feasibility and technical advantage of the designed FC were evaluated. We formulate our plans for technical development and business operation.
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