He Shoucheng, Zhang Lanqing, Cai Jiantao, Wu Xingyu, Sun Hanxi, Du Tao
School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
Materials (Basel). 2022 Aug 25;15(17):5858. doi: 10.3390/ma15175858.
LaBaCoMoO (LBCM, = 0-0.08) cathodes synthesized by a sol-gel method were evaluated for intermediate-temperature solid oxide fuel cells. The limit of the solid solubility of Mo in LBCM was lower than 0.08. As the content of Mo increased gradually from 0 to 0.06, the thermal expansion coefficient decreased from 20.87 × 10 K to 18.47 × 10 K. The introduction of Mo could increase the conductivity of LBCM, which varied from 464 S cm to 621 S cm at 800 °C. The polarization resistance of the optimal cathode LBCM0.04 in air at 800 °C was 0.036 Ω cm, reduced by a factor of 1.67 when compared with the undoped Mo cathode. The corresponding maximum power density of a single cell based on a YSZ electrolyte improved from 165 mW cm to 248 mW cm at 800 °C.
通过溶胶-凝胶法合成的LaBaCoMoO（LBCM，= 0 - 0.08）阴极用于中温固体氧化物燃料电池的评估。Mo在LBCM中的固溶度极限低于0.08。随着Mo含量从0逐渐增加到0.06，热膨胀系数从20.87×10⁻⁶K降至18.47×10⁻⁶K。Mo的引入可提高LBCM的电导率，在800°C时电导率从464 S/cm变化到621 S/cm。最佳阴极LBCM0.04在800°C空气中的极化电阻为0.036Ω·cm²，与未掺杂Mo的阴极相比降低了1.67倍。基于YSZ电解质的单电池在800°C时相应的最大功率密度从165 mW/cm²提高到248 mW/cm²。
