کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7718458 | 1497483 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical performance of continuously gradient composite cathode fabricated by electro-static slurry spray deposition
ترجمه فارسی عنوان
عملکرد الکتروشیمیایی کاتد کامپوزیت به طور مداوم گرادیان ساخته شده توسط رسوب اسپری دوغاب الکترواستاتیک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
The cobalt-based cathode, LSCF, BSCF and SSC, have high thermal expansion coefficients, which cause poor thermal compatibility with electrolytes and limited cell performance. In this work, a continuously gradient Sm0.5Sr0.5CoO3âδ (SSC) - BaCe0.7Zr0.2Y0.1O3âδ (BCZY) composite cathode was developed for BCZY electrolyte based fuel cells by electrostatic spray slurry deposition (ESSD). In the deposited cathode the content of BCZY gradually decreased and that of SSC gradually increased in the direction away from the electrolyte-cathode interface. The single cell, consisting of a BCZY-NiO anode substrate, a BCZY electrolyte and a compositionally gradient SSC-BCZY cathode layer, was assembled and tested from 550 to 700 °C under humidified hydrogen atmosphere (â¼3% H2O) and static air as an oxidant. The cross-sectional morphology of the cathode was examined by energy dispersive X-ray (EDX) analysis. The comparison of electrochemical performances between various cathode configurations was conducted to demonstrate the effect of gradient cathode. The power density and impedance spectra indicate that the optimized cathode structure greatly improves the polarization resistance and ohmic resistance. The results suggest that the migration of protons to triple phase boundaries (TPBs) and the surface diffusion of Oâ might be enhanced in the gradient SSC-BCZY composite cathodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 26, 3 September 2014, Pages 14322-14327
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 26, 3 September 2014, Pages 14322-14327
نویسندگان
Hunhyeong Lee, Jinyi Choi, Inyu Park, Dongwook Shin,