Long-term oxidation and electrical behavior of Nb-doped Ti3SiC2 as solid oxide fuel cell interconnects

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	Long-term oxidation and electrical behavior of Nb-doped Ti3SiC2 as solid oxide fuel cell interconnects
	Zheng, Li-Li ; Li, Xi-Chao ; Hua, Qing-Song ; Dai, Zuo-Qiang ; Zhang, Tie-Zhu ; Qian, Yu-Hai ; Xu, Jing-Jun ; Li, Mei-Shuan
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2017-07-01
卷号	100 期号:7 页码:3155-3164
关键词	area-specific resistance interconnect Nb doping oxidation Ti3SiC2
ISSN号	0002-7820
通讯作者	Zheng, LL (reprint author), Qingdao Univ, Power & Energy Storage Syst Res Ctr, Qingdao, Peoples R China. ; Zheng, LL (reprint author), Qingdao Univ, Coll Mech & Elect Engn, Qingdao, Peoples R China. ; Li, MS (reprint author), Chinese Acad Sci, High Performance Ceram Div, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China.
中文摘要	Nb-doped Ti3SiC2 compounds ((Ti1-xNbx)(3)SiC2, x=0%, 2%, 5%, 7%, and 10%) as novel interconnect materials of intermediate temperature solid oxide fuel cell (IT-SOFC) were studied in the simulated cathode atmosphere. The long-term oxidation behaviors and area-specific resistance (ASR) of these compounds have been investigated at 800 degrees C up to 700hours. Among these compounds, (Ti0.95Nb0.05)(3)SiC2 shows the best oxidation resistance and lowest postoxidation ASR (5.6mcm(2) after exposure at 800 degrees C in air for 700hours), endowing it a great promising material in the application as interconnect of IT-SOFC. After oxidation, Nb is mainly doped uniformly into the lattice of rutile-TiO2 (r-TiO2) grains formed on the tested compounds. Nb doping could decrease the concentrations of both oxygen vacancies and titanium interstitials in r-TiO2. As a result, the oxidation rate of (Ti,Nb)(3)SiC2 decreases remarkably, the structure of the oxide scale changes from a duplex layer of TiO2 outer layer and TiO2+SiO2 mixture inner layer to a single mixture layer. Nb doping also increases the amount of semifree electrons, causing the significant reduce of the postoxidation ASR of (Ti,Nb)(3)SiC2.
学科主题	Materials Science, Ceramics
收录类别	SCI
资助信息	National Science Foundation of China [51271191, 51571205]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78060]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Zheng, Li-Li,Li, Xi-Chao,Hua, Qing-Song,et al. Long-term oxidation and electrical behavior of Nb-doped Ti3SiC2 as solid oxide fuel cell interconnects[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2017,100(7):3155-3164.
APA	Zheng, Li-Li.,Li, Xi-Chao.,Hua, Qing-Song.,Dai, Zuo-Qiang.,Zhang, Tie-Zhu.,...&Li, Mei-Shuan.(2017).Long-term oxidation and electrical behavior of Nb-doped Ti3SiC2 as solid oxide fuel cell interconnects.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,100(7),3155-3164.
MLA	Zheng, Li-Li,et al."Long-term oxidation and electrical behavior of Nb-doped Ti3SiC2 as solid oxide fuel cell interconnects".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 100.7(2017):3155-3164.