可逆燃料电池—电解池氧电极复合改性研究
发布时间：2018-12-21 14:31
【摘要】：固体氧化物燃料电池是一种可以直接将燃料的化学能转化为电能的电化学装置，固体氧化物电解池是固体氧化物燃料电池的逆过程，能够高温电解水/二氧化碳制氢气/一氧化碳。可逆电池将二者的功能合二为一。本论文主要进行了可逆电池的氧电极的复合改性研究。采用LSM（(La0.8Sr0.2)0.95MnO3-δ），LSCF（La0.6Sr0.4Co0.2Fe0.8O3-δ）和SSC（Sm0.5Sr0.5CoO3-δ））氧电极材料。 采用丝网印刷工艺制备的LSM和LSCF氧电极材料用于高温电解池和可逆电池，长期运行后，LSM与电解质YSZ（氧化钇稳定的氧化锆）发生剥离，YSZ与GDC（Gd0.1Ce0.9O2-δ）阻挡层剥离，导致电池性能衰减。 浸渍工艺制备纳米LSM-YSZ，LSCF-YSZ和SSC-YSZ氧电极用于可逆电池，提高了氧电极的性能和催化活性。可逆循环测试或长期稳定性测试后，纳米离子发生团聚导致电池性能衰减。对SSC氧电极的研究发现氧电极SSC与YSZ分层，，以及长期电解后氢电极Ni的团聚也是导致电池性能衰减的主要原因之一。最后，将纳米LSCF-YSZ氧电极用于H2O/CO2共电解，研究了共电解的影响因素和反应过程。 综上，通过本论文研究为开发高活性和高稳定的氧电极材料奠定了基础。
[Abstract]:Solid oxide fuel cell (SOFC) is an electrochemical device which can directly convert the chemical energy of fuel into electric energy. Solid oxide electrolysis cell is the inverse process of SOFC. Can electrolyze water / carbon dioxide at high temperature to produce hydrogen / carbon monoxide. Reversible batteries combine the two functions. In this paper, the composite modification of oxygen electrode of reversible battery was studied. LSM (La0.8Sr0.2) 0.95MnO3- 未), LSCF (La0.6Sr0.4Co0.2Fe0.8O3- 未) and SSC (Sm0.5Sr0.5CoO3- 未) were used as oxygen electrode materials. LSM and LSCF oxygen electrode materials prepared by screen printing process were used in high temperature electrolytic cell and reversible battery. After long-term operation, LSM and YSZ (yttrium stabilized zirconia) were stripped off. YSZ and GDC (Gd0.1Ce0.9O2- 未) barrier layer peel off, resulting in cell performance attenuation. Nanocrystalline LSM-YSZ,LSCF-YSZ and SSC-YSZ oxygen electrodes were prepared by impregnation process for reversible batteries, which improved the performance and catalytic activity of oxygen electrodes. After reversible cycle test or long-term stability test, nano-ion agglomeration results in cell performance attenuation. The study of SSC oxygen electrode shows that the delamination of SSC and YSZ and the agglomeration of Ni of hydrogen electrode after long-term electrolysis are also one of the main causes of cell performance decay. Finally, nanometer LSCF-YSZ oxygen electrode was used in H2O/CO2 co-electrolysis. The influencing factors and reaction process of co-electrolysis were studied. In summary, this paper lays a foundation for the development of high active and stable oxygen electrode materials.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM911.4;TQ150.6
[Abstract]:Solid oxide fuel cell (SOFC) is an electrochemical device which can directly convert the chemical energy of fuel into electric energy. Solid oxide electrolysis cell is the inverse process of SOFC. Can electrolyze water / carbon dioxide at high temperature to produce hydrogen / carbon monoxide. Reversible batteries combine the two functions. In this paper, the composite modification of oxygen electrode of reversible battery was studied. LSM (La0.8Sr0.2) 0.95MnO3- 未), LSCF (La0.6Sr0.4Co0.2Fe0.8O3- 未) and SSC (Sm0.5Sr0.5CoO3- 未) were used as oxygen electrode materials. LSM and LSCF oxygen electrode materials prepared by screen printing process were used in high temperature electrolytic cell and reversible battery. After long-term operation, LSM and YSZ (yttrium stabilized zirconia) were stripped off. YSZ and GDC (Gd0.1Ce0.9O2- 未) barrier layer peel off, resulting in cell performance attenuation. Nanocrystalline LSM-YSZ,LSCF-YSZ and SSC-YSZ oxygen electrodes were prepared by impregnation process for reversible batteries, which improved the performance and catalytic activity of oxygen electrodes. After reversible cycle test or long-term stability test, nano-ion agglomeration results in cell performance attenuation. The study of SSC oxygen electrode shows that the delamination of SSC and YSZ and the agglomeration of Ni of hydrogen electrode after long-term electrolysis are also one of the main causes of cell performance decay. Finally, nanometer LSCF-YSZ oxygen electrode was used in H2O/CO2 co-electrolysis. The influencing factors and reaction process of co-electrolysis were studied. In summary, this paper lays a foundation for the development of high active and stable oxygen electrode materials.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM911.4;TQ150.6
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