固体氧化物电池Ni-YSZ燃料电极长期稳定性研究进展

Research Progress on the Long-term Stability of Ni-YSZ Fuel Electrodes in Solid Oxide Cells

在碳中和背景下,固体氧化物电池(SOCs, Solid Oxide Cells)是一种极具前途的能量转换技术。在SOCs中,尽管在开发混合离子电子导体复合电极和钙钛矿燃料电极方面取得了令人瞩目的进展,但Ni-YSZ由于同时具有SOFC模式下氢氧化反应(HOR)和SOEC模式下析氢反应(HER)的优异催化活性,仍然是商业化燃料电极的最佳选择。然而,Ni-YSZ电极的衰减是制约SOCs发展的重要问题。简单介绍了Ni-YSZ电极材料,并总结了SOFC和SOEC模式下有关Ni-YSZ电极衰减的典型现象,重点关注了Ni-YSZ电极衰减的原因,并基于衰减机理提出了改进方案和思路。最后,对Ni-YSZ电极长期稳定性的优化策略提出了展望。

Solid oxide cells(SOCs) are promising energy conversion technology for carbon-neutral direction. Although impressive progress has been made in developing mixed ionic and electronic conductor(MIEC) composite electrodes and perovskite fuel electrodes, Ni-YSZ is the best option for commercial application, because of its excellent catalytic effect for both hydrogen oxidation reaction(HOR) in SOFC and hydrogen evolution reaction(HER) in SOEC. However, the degradation of Ni-YSZ electrodes is still an important issue restricting the development of SOCs. Ni-YSZ electrode materials are briefly introduced and the typical phenomena related to Ni-YSZ electrode degradation in SOFC and SOEC are summarized. Also, the reason of degradation of the Ni-YSZ electrode is examined, based on which improvement strategies are proposed. Finally, an outlook on the optimization for the long-term stability of Ni-YSZ electrodes is presented.