LSM particle size effect on the overall performance of IT-SOFC
来源期刊：Journal of Rare Earths2012年第12期
论文作者：郑颖平 葛衫 周雪影 陈红 黄烁 王绍荣 孙岳明
文章页码：1240 - 1244
摘 要：In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 （LSM）/Ce0.8Sm0.2O1.9 （SDC） composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was found that the change in particle size of LSM nanoparticle from 40 to 90 nm resulted in an increase in the maximum power density from 132 to 228 mW/cm2 at 650 ℃ with H2 as fuel and O2 as oxidant. And the polarization resistance of the electrode decreased from 2.547 to 1.034 Ω·cm2. Concerning the particle size of electrode materials, a higher activity was anticipated with smaller particles because a large number of TPB or electrode surface sites along with a higher porosity could be developed. However, this study showed that the electrode prepared with particles of larger diameter had fine and uniform micro-structure resulting in higher power density and lower overpotential, where homogeneous distribution of particles and pores was beneficial for increasing the electrochemical active area and the electronic conductivity of the electrodes as well as the gas diffusion for the reactants.
郑颖平1，葛衫1，周雪影1，陈红1，黄烁1，王绍荣2，孙岳明1
1. School of Chemistry and Chemical Engineering,Southeast University2. Shanghai Institute of Ceramics,Chinese Academy of Sciences
摘 要：In this paper, we reported the fuel cell performance with La0.8Sr0.2MnO3 （LSM）/Ce0.8Sm0.2O1.9 （SDC） composite cathode prepared from LSM powders of different particle sizes via the silk-printing technique. It was found that the change in particle size of LSM nanoparticle from 40 to 90 nm resulted in an increase in the maximum power density from 132 to 228 mW/cm2 at 650 ℃ with H2 as fuel and O2 as oxidant. And the polarization resistance of the electrode decreased from 2.547 to 1.034 Ω·cm2. Concerning the particle size of electrode materials, a higher activity was anticipated with smaller particles because a large number of TPB or electrode surface sites along with a higher porosity could be developed. However, this study showed that the electrode prepared with particles of larger diameter had fine and uniform micro-structure resulting in higher power density and lower overpotential, where homogeneous distribution of particles and pores was beneficial for increasing the electrochemical active area and the electronic conductivity of the electrodes as well as the gas diffusion for the reactants.
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