An Efficient Electron-Blocking Interlayer Induced by Metal Ion Diffusion for SOFC Based on Y-Doped Ceria Electrolyte

Jiafeng Cao; Yi Liu; Xianshan Huang; Yuexia Ji

doi:10.1021/acsami.7b18924

An Efficient Electron-Blocking Interlayer Induced by Metal Ion Diffusion for SOFC Based on Y-Doped Ceria Electrolyte

ACS Appl Mater Interfaces. 2018 Mar 28;10(12):10528-10535. doi: 10.1021/acsami.7b18924. Epub 2018 Mar 13.

Authors

Jiafeng Cao¹, Yi Liu¹, Xianshan Huang¹, Yuexia Ji¹

Affiliation

¹ School of Mathematics and Physics , Anhui University of Technology , Maanshan 243032 , P. R. China.

PMID: 29493208
DOI: 10.1021/acsami.7b18924

Abstract

To suppress the internal electronic leakage at ceria-based electrolyte, a novel electron-blocking layer consisting of doped BaCe_0.8Y_0.2O_3-δ was fabricated in situ at the interface of Ba-containing anode and Y-doped ceria electrolyte. The anode-supported full cell based on Y_0.2Ce_0.8O_1.9 (YDC20) electrolyte presents a remarkable peak power density of 814 mW/cm² as well as an open-circuit voltage of 1.0 V at 650 °C, which are much higher than those of the cells with Gd_0.1Ce_0.9O_1.95 (GDC10) electrolyte (453 mW/cm² at 650 °C) and BaCe_0.8Y_0.2O_3-δ|Y_0.2Ce_0.8O_1.9 (BCY|YDC20) bilayered electrolyte (419 mW/cm² at 650 °C). The efficient promotion of the electron-blocking interlayer with high oxygen ionic conductivity is considered as the main reason for the improved performance of YDC20-based solid oxide fuel cell. The composition and the microstructure of the electron-blocking interlayer are further analyzed by scanning electron microscope and transmission electron microscope characterizations.

Keywords: Y-doped ceria; electron-blocking layer; in situ reaction; internal electronic leakage; solid oxide fuel cells.