公开(公告)号：US12034168B2

公开(公告)日：2024-07-09

申请号：US17666402

申请日：2022-02-07

申请人： NANJING TECH UNIVERSITY

发明人： Wei Zhou ,  Yuan Zhang ,  Chuan Zhou ,  Guangming Yang ,  Zongping Shao

IPC分类号： H01M4/90 ,  C04B35/495 ,  C04B35/626 ,  C04B35/64 ,  H01M4/86 ,  H01M8/12 ,  H01M8/1246

CPC分类号： H01M4/9033 ,  C04B35/495 ,  C04B35/6261 ,  C04B35/62645 ,  C04B35/64 ,  H01M8/1246 ,  C04B2235/326 ,  C04B2235/3275 ,  C04B2235/6567 ,  C04B2235/768 ,  C04B2235/9607 ,  H01M2004/8689 ,  H01M2008/1293 ,  H01M2300/0074

摘要： The present invention relates to a composite of a cobalt-based perovskite material with a negative thermal expansion material, and a preparation method of the same, and a solid oxide fuel cell (SOFC) comprising the same, and belongs to the technical field of fuel cells. In the present invention, a negative thermal expansion material is introduced into a cobalt-based perovskite oxide to successfully prepare an SOFC cathode material with excellent electrochemical performance and low thermal expansivity. The composite electrode achieves prominent mechanical tolerance in SOFC, which can moderate a volume change during the whole calcination process and enable a smooth transition to a high-temperature stage. The composite electrode has a thermal expansion coefficient (TEC) only of 12.9×10−6 K−1, which is perfectly matched with that of an SDC electrolyte. In addition, the composite shows excellent oxygen reduction reaction (ORR) activity, high TEC, and extremely-excellent anti-CO2 poisoning performance.