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硬模板法制备固体氧化物燃料电池Ni0.5Cu0.5Ba0.05Ox包覆管状SDC立体阳极

Fabrication of Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x coated SDC stereoscopic anode by hard template method for solid oxide fuel cells
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摘要 为在固体氧化物燃料电池中有效利用干甲烷为燃料,需制作多孔立体阳极。采用硬模板法和浸渍法制备Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x包覆管状SDC阳极材料(Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x/SDC),为作对比,用溶胶凝胶法制备粉末状Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x,机械混合SDC粉末制备Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x-SDC。将这两种阳极材料分别制作电解质支撑的单电池Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x/SDC|YSZ|LSMYSZ与Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x-SDC|YSZ|LSM-YSZ,并进行发电性能测试以及长期稳定性实验。结果表明,800℃下,干甲烷环境中,Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x-SDC为阳极的单电池最大功率密度为324.99 m W/cm2,运行10 h后,电压下降5.60%;而以Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x/SDC为阳极的单电池最大功率密度达到384.54 m W/cm2,运行100 h后,电压未严重衰减。实验后阳极的SEM照片表明,Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x-SDC阳极内孔隙狭小,易被积炭堵塞;而Ni_(0.5)Cu_(0.5)Ba_(0.05)O_x/SDC阳极呈立体多孔结构,有利于燃料气体与反应后气体的扩散。催化剂颗粒均匀地包覆在SDC纤维管表面,有利于增加三相界面,提高电池的稳定性。 The fabrication of porous and stereoscopic anode is crucial for the effective use of dry methane as fuel in solid oxide fuel cells （SOFCs）. In this work, tubular SDC coated with Ni0.5Cu0.5Ba0.05Ox （Ni0.5Cu0.5Ba0.05Ox/SDC） was prepared by hard template method combined with wet impregnation method. For comparison, Ni0.5Cu0.5Ba0.05Ox powder was also prepared by sol-gel method and then mixed with SDC to get anode Ni0.5Cu0.5Ba0.05Ox-SDC. Corresponding electrolyte-supported unit cells Ni0.5Cu0.5Ba0.05Ox/SDC｜YSZ｜LSM-YSZ and Ni0.5Cu0.5Ba0.05Ox-SDC｜YSZ｜LSM-YSZ were then fabricated for the power generation performance and long-term stability test. Fueled with dry methane at 800℃ on a fuel cell with Ni0.5Cu0.5Ba0.05Ox-SDC as anode, the maximum power density is only 324.99 mW/cm^2 and the voltage drops 5.60% after 10 h operation; however, with Ni0.5Cu0.5Ba0.05Ox/SDC as the anode, the maximum power density reaches 384.54 mW/cm^2 and no degradation in voltage is observed for 100 h. As reveled by SEM, the narrow pores in Ni0.5Cu0.5Ba0.05Ox-SDC anode are prone to block by carbon deposition; in contrast, Ni0.5Cu0.5Ba0.05Ox/SDC has a three-dimensional porous structure for the diffusion of fuel and reactant gas. The surface of SDC fiber tube is coated by the catalyst particles, which can improve the three phase boundary and enhance the cell stability.
作者 由宏新 招聪 曲斌 刘润杰 官国清 徐立军 阿布里提
机构地区 大连理工大学化工机械与安全学院 日本弘前大学北日本新能源研究中心 新疆工程学院电气与信息工程系
出处 《燃料化学学报》 EI CAS CSCD 北大核心 2016年第10期1272-1280,共9页 Journal of Fuel Chemistry and Technology
基金 新疆维吾尔自治区国际科技合作计划项目(20156007)资助
关键词 固体氧化物燃料电池 阳极 硬模板 积炭 长期稳定性 solid oxide fuel cell anode hard template carbon deposition long term stability
分类号 TM911.4 [电气工程—电力电子与电力传动]
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燃料化学学报
2016年 第10期

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