陽極支撐三層一體化結構電池的制備及性能研究
2016-05-30 00:36:07韓敏芳楊志賓鄭紫微
科技創新導報 2016年10期
韓敏芳 楊志賓 鄭紫微
摘 要：采用流延工藝制備了NiO-8%Y2O3/ZrO2（YSZ）陽極支撐三層一體化結構單電池，在此基礎上采用浸漬工藝在多孔YSZ 基體上低溫制備了高活性陰極La0.6Sr0.4Co0.2Fe0.8O3–δ（LSCF）。研究發現：降低電極制備溫度可以得到微觀形貌可控、分布均勻的納米電極，并且避免了電極與基體間的反應；通過控制浸漬次數，制備了不同LSCF含量的電池；隨著浸漬量的增加，電極的極化電阻顯著下降；在800 ℃時，LSCF質量分數為45%的電池的功率密度高達1090 mW/cm2，同時電池穩定運行90 h，表現出了很好的穩定性。
關鍵詞：固體氧化物燃料電池 三層一體化 陽極支撐 浸漬工藝
Abstract：Tri-layer composite NiO-8%Y2O3/ZrO2（YSZ） anode supported single cell for solid oxide fuel cell （SOFC） was fabricated via tape-casting， and high performance cathode La0.6Sr0.4Co0.2Fe0.8O3–δ（LSCF） was fabricated at a low temperature via infiltration inporous YSZ. The morphology-controlled and uniformly-distributed nano-electrode was obtained， and the reaction between the elec-trode and substrate was avoided as the cathode fabrication temperature was decreased. The single cells with different contents of LSCF were fabricated via the change of the infiltration time. The polarization resistance of the electrode decreased with increasing the infiltration content. The maximum output power density was 1 090 mW/cm2 at 800 ℃ and the cathode infiltration content of 45%（mass fraction）. In addition， the cell could operate stably for 90 h， showing the excellent stability.
Key Words：Solid oxide fuel cell； tri-layer composite； anode supported； infiltration process
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