无机材料学报2024，Vol.39Issue(3)：337-344,中插11-中插12,10.DOI:10.15541/jim20230428
双钙钛矿Sr2CoFeO5+δ阴极材料的制备及其中温固体氧化物燃料电池性能研究
Double Perovskite Sr2CoFeO5+δ:Preparation and Performance as Cathode Material for Intermediate-temperature Solid Oxide Fuel Cells
摘要
Abstract
Intermediate-temperature solid oxide fuel cells(IT-SOFCs),as the operating temperature decreases,require cathode materials with high catalytic activity.In this study,double perovskite Sr2CoFeO5+δ(SCF)was synthesized by Sol-Gel method,and effect of SCF cathode compounded with 20%(molar fraction)Sm2O3 doped CeO2(SDC)at different ratios on the electrode performance was elucidated.The SOFC single-cell performance was improved by optimized chemical expansion and area-specific resistance(ASR)from composite electrodes.Results show that,SCF cathode after annealing at 950℃for 10 h exhibits good chemical compatibility with common electrolytes.For the composite of SCF and SDC at a mass ratio of 1:1,the average thermal expansion coefficient(TEC)can be significantly reduced from 2.44×10-5 K-1 of pure SCF to 1.54×10-5 K-1.ASR of SCF-x SDC(x=20,30,40,50,x:mass percentage)composite cathodes are as low as 0.036,0.034,0.028 and 0.092 Ω·cm2 at 800℃,respectively.The SCF-40SDC composite cathode displays the lowest ASR value among SCF-x SDC in the whole temperature range.Based on the 0.3 mm-thick La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM)electrolyte,the maximum power density of SOFC using SCF-40SDC(757 mW·cm-2)as a cathode is higher than that of pure SCF(684 mW·cm-2).These results demonstrate that the SCF-40SDC composite cathode is a promising candidate for application in IT-SOFCs.关键词
固体氧化物燃料电池/双钙钛矿/阴极/Sr2CoFeO5+δ/复合电极/电化学性能Key words
solid oxide fuel cell/double perovskite/cathode/Sr2CoFeO5+δ/composite electrode/electrochemical performance分类
化学化工引用本文复制引用
陈正鹏,李晓伟,凌意瀚,金芳军,李明飞,董江波,许仁辞,徐韩昭,熊凯,饶睦敏,陈创庭..双钙钛矿Sr2CoFeO5+δ阴极材料的制备及其中温固体氧化物燃料电池性能研究[J].无机材料学报,2024,39(3):337-344,中插11-中插12,10.基金项目
The Key-Area Research and Development Program of Guangdong Province(2022B0111130004) （2022B0111130004）
National Natural Science Foundation of China(52272257) （52272257）
Innovation Team of Jiangsu Province(JSSCTD202241) （JSSCTD202241）
