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La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ電極應用于YSZ基對稱SOFC性能研究
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中國礦業(yè)大學(北京),中國礦業(yè)大學(北京),中國礦業(yè)大學(北京),中國礦業(yè)大學(北京)

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國家重點基礎研究發(fā)展計劃(973計劃);國家自然科學基金項目(面上項目,重點項目,重大項目)


La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ Electrodes for YSZ-based Symmetrical SOFC
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China University of Mining &Technology, Beijing,China University of Mining &Technology, Beijing,China University of Mining &Technology, Beijing,China University of Mining &Technology,Beijing

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    摘要:

    采用固相法合成了鈣鈦礦型氧化物La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ(LSCFN),并采用流延-絲印法制備了以8mol%Y2O3穩(wěn)定ZrO2(YSZ)為電解質(zhì)、Gd0.1Ce0.9O2-δ(GDC)為隔離層、LSCFN同時做陰極和陽極的對稱固體氧化物燃料電池。利用X射線衍射對電極材料進行了物相及化學相容性分析,用掃描電鏡表征了對稱電池的微觀形貌。分別以濕H2(3%H2O)和濕CH4(3%H2O)為燃料氣,空氣為氧化氣測試了單電池的電化學性能,并在850℃濕CH4下進行了電池的穩(wěn)定性測試。結(jié)果表明:LSCFN與GDC具有良好的化學相容性。以濕H2和濕CH4為燃料氣的單電池在850℃時最大功率密度分別為254 mW cm-2,105 mW cm-2。在100 h的CH4穩(wěn)定性測試中性能無明顯衰減,具有良好的穩(wěn)定性。因此LSCFN是很有前景的可應用于YSZ電解質(zhì)的對稱電極材料。

    Abstract:

    La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ(LSCFN),a perovskite oxide materials, have been synthesized by the solid state reaction method .The electrolyte-supported symmetrical solid oxide fuel cells were fabricated by tape-casting and screen-printing procedure using YSZ as electrolyte, GDC as interlayer and LSCFN as both anode and cathode. The crystal structure and chemical stability were examined by X-ray diffraction (XRD) and microstructure was inspected by scanning electron microscopy (SEM). The electrical properties of single cell were tested by using humidified 3% H2 and CH4 as fuel respectively, ambient air as oxidant and tested the stability in humidified 3% CH4 at 850℃.The results show that LSCFN appeared to be chemically compatible with GDC to at least 1400℃. The maximum power density was 254 mW cm-2 and 105 mW cm-2 in humidified H2 and CH4 at 850℃, respectively. Stable performance was sustained for at least for 100 h operating in humidified CH4. These results suggest that the LSCFN can potentially serve as an electrode for symmetrical SOFCs with YSZ electrolyte.

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牛玉霜,楊志賓,鄭紫微,韓敏芳. La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ電極應用于YSZ基對稱SOFC性能研究[J].稀有金屬材料與工程,2017,46(1):262~265.[Niu Yushuang, yangzhibin, Zheng Ziwei, Han Minfang. La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ Electrodes for YSZ-based Symmetrical SOFC[J]. Rare Metal Materials and Engineering,2017,46(1):262~265.]
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  • 收稿日期:2014-10-10
  • 最后修改日期:2014-10-31
  • 錄用日期:2014-12-03
  • 在線發(fā)布日期: 2017-03-16
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