کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7708736 1497323 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Degradation kinetics of LSM-YSZ cathode materials for SOFC
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Degradation kinetics of LSM-YSZ cathode materials for SOFC
چکیده انگلیسی
Solid oxide fuel cells are perspective electrochemical devices for hydrogen energy applications and require long time performance. The paper studies the influence of the processes of particles coarsening and cation interdiffusion on the degradation kinetics of the LSM-YSZ cathode material catalytic activity as related to the interaction processes with oxygen from the gas phase. The exchange kinetics with the gas phase oxygen was studied by the oxygen isotope exchange method with the gas phase equilibration at the temperature of 850 °С and Po2 = 10−2 atm. The samples were exposed for 1000 h. The coefficient of gas phase and surface oxygen exchange was found to decrease at the exposure. The paper discusses the physical reasons, which lead to the oxygen surface exchange coefficient decrease in LSM-YSZ electrodes and degradation of the polarization conductivity measured by electrochemical impedance spectroscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 2, 11 January 2018, Pages 951-959
نویسندگان
, , , ,