Controlled fabrication of anode microstructures in solid oxide fuel cells

固体氧化物燃料电池的阳极中的常规微结构由于路径随机地定位，因此在其边界处的物质转移或化学反应的观点中没有必要进行优化。在本研究中，我们的目标是沿着沿着厚度方向排列YSZ、Ni和孔，其中氧离子、电子和气体分别有效地传输。磁场使Ni颗粒定向排列，最大功率提高到常规电池的1.6倍。利用纤维束扫描电镜（FIB SEM）和电化学反应计算对微结构进行了重构，结果表明，弯曲度由7提高到3左右。在Zr基体上沉积Al膜，通过阳极氧化形成贯通的氧化铝纳米孔，再以孔为模板进行二次阳极氧化，成功地合成了氧化锆柱。

Conventional microstructures in anode of solid-oxide fuel cells has not been necessarily optimized in a view point of the transfer of matters or chemical reactions at their boundaries because the paths are located randomly. In this study, we aimed for alignment of YSZ, Ni and pore along the thickness direction, in which the oxygen ions, electrons and gases are effectively transferred respectively. Ni particles were aligned by magnetic field and the maximum power improved to 1.6 times as the conventional cell. The reconstruction of the microstructure with FIB-SEM and electrochemical reaction calculation indicated that the tortuosity was improved to about 3 from 7. Furthermore, Al film was deposited on a Zr substrate and alumina through nanoholes were formed by anodic oxidation, and then the zirconia pillars were successfully synthesized by reanodization using the nanoholes as a mold.