Novel lanthanum and cerium coatings on (Ba, Sr)-ferrate cathodes for intermediate-temperature solid oxide fuel cells

被引：9

作者：

Wang, Yao-Ming ^{[1
]}

Chang, Chia-Ming ^{[1
]}

Shih, Jing-Shiang ^{[2
]}

Chang, Horng-Yi ^{[1
]}

机构：

[1] Natl Taiwan Ocean Univ, Dept Marine Engn, 2 Beining Rd, Keelung 20224, Taiwan

[2] MIRDC, Met Proc R&D Dept, 1001 Kaonan Highway, Kaohsiung, Taiwan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2016年 / 36卷 / 14期

关键词：

Solid oxide fuel cell; Ba0.5Sr0.5FeO3-delta; Ce coating; Triple-phase boundaries; IONIC-ELECTRONIC CONDUCTIVITY; OXYGEN STOICHIOMETRY; ELECTROCHEMICAL PROPERTIES; PEROVSKITE OXIDE; STABILITY; PERMEABILITY; REDUCTION; MECHANISM; SYSTEM;

D O I：

10.1016/j.jeurceramsoc.2016.05.018

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ba0.5Sr0.5FeO3-delta (BSF) and Nb-doped BSF (BSNF) particles were coated with single or combined La and Ce (LC) components by a novel semi-organic solution method. Ce-coated BSF (BSF-x Ce) presented a cubic structure after heat treatment. Sintering BSF-x Ce and BSNF-x LC at 1150 degrees C for 6 h reduced the grain sizes. Among the coated samples, 3.75 mol% LC-coated BSNF (BSNF-3.75 LC) presented the most significant conductivity increase. AC impedance data indicate that the LC coating decreased the ohmic and diffusion resistances in half-cells with a BSNF-x LC cathode and (La0.75Sr0.2Ba0.05)(0.175)Ce0.825O1.891 (LSBC) electrolyte. The power density of the BSNF-3.75 LC/LSBC/Pt half-cell at 650 degrees C far exceeds that of BSF/LSBC/Pt at 700 degrees C. The Ce coating on BSF and LC coating on BSNF provided lattice stability and better BSF cathode-LSBC electrolyte adhesion. LC coating enhanced the cell performance by increasing the triple-phase boundaries (TPBs) in the solid oxide fuel cell (SOFC). (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：3433 / 3440

页数：8

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