TY - JOUR
TI - A hierarchical hybrid electrode for rapid oxygen reduction reaction below 800°C
AU - Li Fushao
AU - Xu Yingxian
AU - Xia Shubiao
AU - Liu Jianjun
AU - Yan Yuxing
AU - Jiang Long
AU - Cheng Feixiang
JN - Thermal Science
PY - 2020
VL - 24
IS - 4
SP - 2455
EP - 2462
PT - Article
AB - The 3-D backbones with ionic conductivity are first built by sintering  Ce0.8Sm0.2O1.9 silks, then Ca3Co2O6 nanoparticles as electrocatalyst are  filled in by infiltrating ionic solution, as a result, a hybrid electrode  with hierarchical structure is constructed as the cathode of solid oxide  fuel cells. Compared with the single-phase Ca3Co2O6 bulk cathode and common  Ca3Co2O6-Ce0.8Sm0.2O1.9 composite one, this hybrid electrode is very active  for oxygen reduction reaction. At 800°C, area specific resistance with this  cathode is reduced to 0.062 Ωcm2, and power density peak with the  electrolyte-supported single-cell is promoted to 760 mW/cm2. The superior  catalytical activity is attributed to the enlarged area for surface oxygen  exchange kinetics and enhanced ionic transport behaviour.