物理化学学报 >> 2010, Vol. 26 >> Issue (03): 583-588.doi: 10.3866/PKU.WHXB20100323

电化学 上一篇    下一篇

Cu-CeO2基阳极直接甲烷SOFC的制备及其性能

雷泽, 朱庆山, 韩敏芳   

  1. 中国矿业大学(北京)化学与环境工程学院, 煤气化燃料电池研究中心, 北京 100083; 中国科学院过程工程研究所, 多相复杂系统国家重点实验室,北京 100190
  • 收稿日期:2009-12-23 修回日期:2010-01-07 发布日期:2010-03-03
  • 通讯作者: 雷泽 E-mail:zelei@home.ipe.ac.cn

Fabrication and Performance of Direct Methane SOFC with a Cu-CeO2-Based Anode

LEI Ze, ZHU Qing-Shan, HAN Min-Fang   

  1. Research Center of Fuel Cell on Coal Gasification, School of Chemical and Environmental Engineering, China University of Mining &Technology, Beijing 100083, P. R. China; State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2009-12-23 Revised:2010-01-07 Published:2010-03-03
  • Contact: LEI Ze E-mail:zelei@home.ipe.ac.cn

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摘要：

采用干压法制备了NiO-YSZ(氧化钇稳定氧化锆)/(ZrO2)0.89(Sc2O3)0.1(CeO2)0.01(10ScSZ-1CeO2)半电池, 经还原-酸溶法除去NiO制备了多孔YSZ负载致密10ScSZ-1CeO2双层结构, 通过浸渍法在多孔YSZ阳极基体中引入Ce、Cu的硝酸盐制备Cu-CeO2-YSZ复合阳极, 结合La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)阴极构建了Cu-CeO2-YSZ/10ScSZ-1CeO2/LSCF单元电池. 通过X射线衍射(XRD)和场发射扫描电镜(FESEM)等手段对电池单元的物相、微观结构进行表征. 结果表明: 还原-酸溶法制备的YSZ/10ScSZ-1CeO2双层结构的YSZ基体具有孔隙率高(>64%)、孔洞连通性好的微观结构, 有助于采用浸渍法引入Ce、Cu硝酸盐; 10ScSZ-1CeO2电解质薄膜致密无缺陷, 厚约30 μm. 电性能测试表明所构建单元固体氧化物燃料电池(SOFC)具有良好的电性能输出, 在650 ℃以湿H2和CH4为燃料时的最大功率密度分别为0.29和0.09 W·cm-2; 在700 ℃以湿H2和CH4为燃料时的最大功率密度分别达到0.48 和0.21 W·cm-2. 优良的电性能主要归功于小的电解质内阻和阴极极化电阻以及良好的阳极微观结构.

关键词: 固体氧化物燃料电池, 甲烷, Cu-CeO2, 阳极, 浸渍

Abstract:

Highly porous yttria stabilized zirconia (YSZ) supported dense (ZrO2)0.89(Sc2O3)0.1(CeO2)0.01 (10ScSZ-1CeO2) bilayers were fabricated by removing NiO with a reduction-acid leaching method using NiO-YSZ/10ScSZ-1CeO2 half cells that were prepared by dry-pressing. By allowing Ce and Cu nitrate solutions to infiltrate the porous YSZ matrix, single cells of Cu-CeO2-YSZ/10ScSZ-1CeO2/LSCF (LSCF: La0.6Sr0.4Co0.2Fe0.8O3-δ) were fabricated. The cell's structure was characterized by X-ray diffractometry (XRD) and field-emission scanning electron microscopy (FESEM). Results showed that the porous YSZ matrix of the YSZ/10ScSZ-1CeO2 bilayers prepared by the reduction-acid leaching method was of high porosity (more than 64%) and it was highly connected, which was beneficial for the introduction of Ce and Cu nitrate by infiltration. The 10ScSZ-1CeO2 electrolyte filmwith a thickness of 30 μm was dense and pinhole-free. A single cell composed of Cu-CeO2-YSZ/10ScSZ-1CeO2/LSCF showed excellent generation performance with maximum power densities of 0.29 and 0.09 W·cm-2 at 650 ℃, as well as 0.48 and 0.21 W·cm-2 at 700 ℃using moist hydrogen and methane as fuel, respectively. This excellent performance is attributed to the electrolyte's small ohmic resistance, small cathode polarization resistance, and favorable anode microstructure.

Key words: Solid oxide fuel cell, Methane, Cu-CeO2, Anode, Infiltration