Ceria/Bismuth Oxide Bilayer Electrolyte based Low-Temperature SOFCs with Stable Electrochemical Performance. (30th May 2017)

• Record Type: Journal Article
• Authors: Jaiswal, Abhishek; Pesaran, Alireza; Omar, Shobit; Wachsman, Eric D.
• Is Part Of: ECS transactions. Volume 78:Number 1(2017)
• Page Start: 361
• Page End: 370
• Publication Date: 2017-05-30
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/07801.0361ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : In this work, we report on the fabrication and performance of anode supported cells based on gadolinium doped ceria (GDC) and stabilized bismuth oxide (xSB) bilayer electrolyte that can operate at low temperatures (450-650 °C). Thickness of GDC and xSB layers was varied between 23-70 μm and 0-25 μm, respectively. The results showed the addition of xSB layer was effective in blocking electronic conduction which increased the OCV compared to the baseline single layer GDC cell. Further, the relative and total thickness of the two layers showed a significant impact on the OCV of the cell at different temperatures with best performance obtained with cells with lower GDC thickness and higher xSB thickness. Long-term stability tests showed exceptionally low degradation rates for OCV of the bilayer GDC/xSB cells. At 650 o C, a GDC/xSB bilayer fuel cell showed a maximum power density and total area specific resistance (ASR) of 1.06 W/cm 2 and 0.17 Wcm 2, respectively.