The type-B is helpful to the form of reticular structure, and make sure the TPB is validity.Compared with the type-A, the type-B was more significant to decrease polarization.

• B型结构更有利于形成两相的网状结构，保证了所形成TPB的有效性，使阴极内部产生的氧离子顺利地传输至电解质表面，与A型复合阴极相比更加显著地降低了阴极极化。