YSZ/Ni-YSZ双层中空纤维电解质层厚度控制及其影响

无机材料学报, 2013, 28(10): 1108-1114. doi: 10.3724/SP.J.1077.2013.12755

YSZ/Ni-YSZ双层中空纤维电解质层厚度控制及其影响

宫勋 ^1, , 孟秀霞 ^2, , 杨乃涛 ^3, , 谭小耀 ^4, , 尹屹梅 ^5, , 马紫峰 ^6,

1.山东理工大学化工学院,淄博,255049

2.山东理工大学化工学院,淄博255049;上海交通大学化学工程系,上海200240

3.山东理工大学化工学院,淄博,255049

4.山东理工大学化工学院,淄博255049;天津工业大学化学工程系,天津300160

5.上海交通大学化学工程系,上海,200240

6.上海交通大学化学工程系,上海,200240

基金项目: 山东省优秀中青年科学家科研奖励基金(2010BSB01011) Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province(2010BSB01011) National Natural Science Foundation of China(21176187,21076118,21173147) 国家自然科学基金(21176187,21076118,21173147)

关键词：双层中空纤维 , YSZ电解质膜 , 相转化法 , 微管式固体氧化物燃料电池 , 共纺丝-共烧结

Electrolyte Thickness Control and Its Effect on YSZ/Ni-YSZ Dual-layer Hollow Fibres

Keywords： dual-layer hollow fibre (DL-HF) , YSZ electrolyte membrane , phase-inversion method , micro tubular solid oxide fuel cells (MT-SOFCs) , co-spinning-sintering

本研究利用相转化共纺丝法一步制备出微管式固体氧化物燃料电池(MT-SOFC)用电解质/阳极(YSZ/NiO-YSZ)双层中空纤维膜,将制得的YSZ/NiO-YSZ双层中空纤维膜前驱体经1450℃烧结后,以纯H2在700℃下还原4h得到YSZ/Ni-YSZ双层中空纤维膜.电解质YSZ膜层厚度通过改变YSZ铸膜液挤出速率来调节.将La0.8Sr0.2MnO3-δ(LSM)阴极乳浆浸渍涂覆在烧结后的YSZ/NiO-YSZ双层中空纤维膜外,经1200℃烧结后形成微管式固体氧化物燃料电池.结果表明,当阳极铸膜液以10 mL/min速率挤出,而电解质铸膜液挤出速率为0.5、1、1.5、2 mL/min时,构造的YSZ/Ni-YSZ双层中空纤维膜电解质层厚度分别为6、13、18、28 μm,其机械强度、气密性均随着电解质层厚度增加而增大,但电导率与孔隙率受电解质层厚度的影响较小.YSZ膜厚度为28 μm的MT-SOFC,800℃时以20 mL/min氢气作为燃料,30 mL/min空气作为氧化剂,最大开路电压为1.01V,最大输出功率只有75 mW/cm2.但同样测试条件下,YSZ膜厚度为6μm的MToSOFC,开路电压为0.92 V,最大输出功率升至329 mW/cm2.

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