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学科主题: 物理化学
题名: High-efficiency intermediate temperature solid oxide electrolyzer cells for the conversion of carbon dioxide to fuels
作者: Yan, Jingbo1, 2;  Chen, Hao3;  Dogdibegovic, Emir3;  Stevenson, Jeffry W.4;  Cheng, Mojie1;  Zhou, Xiao-Dong3
通讯作者: 程谟杰
关键词: High temperature electrolysis ;  CO2 reduction ;  Distribution of relaxation times analysis ;  Carbon deposition
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-04-15
DOI: 10.1016/j.jpowsour.2013.11.047
卷: 252, 期:1, 页:79-84
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: Electrochemical reduction of carbon dioxide in the intermediate temperature region was investigated by utilizing a reversible solid oxide electrolysis cell (SOEC). The current potential (i-V) curve exhibited a nonlinear characteristic at low current density. Differentiation of i-V curves revealed that the cell area specific resistance (ASR) was current-dependent and had its maximum in electrolysis mode and minimum in fuel cell mode. Impedance measurements were performed under different current densities and gas compositions, and the results were analyzed by calculating the distribution of relaxation times. The ASR variation resulted from the difference in electrochemical reactions occurring on the Ni-YSZ electrode, i.e., Ni-YSZ is a better electrode for CO oxidation than for CO2 reduction. Coke formation on Ni-YSZ played a crucial role in affecting its electrolysis performance in the intermediate temperature region. The ASR apex was associated with a decrease in cell temperature during electrolysis due to the endothermic nature of CO2 reduction reaction. It was postulated that such a decrease in temperature and rise in CO concentration led to coke formation. As a consequence, higher temperature (>700 degrees C), higher CO2 concentration (>50%), and the presence of hydrogen or steam are recommended for efficient CO2 reduction in solid oxide electrochemical cells. (C) 2013 Elsevier B.V. All rights reserved.
关键词[WOS]: ELECTROCHEMICAL PERFORMANCE ;  IMPEDANCE SPECTRA ;  OXYGEN ELECTRODES ;  NUCLEAR-ENERGY ;  GAS-TRANSPORT ;  COELECTROLYSIS ;  DEGRADATION ;  CATHODE ;  ANODES ;  STEAM
语种: 英语
WOS记录号: WOS:000347369600012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143994
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Fuel Cells, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ S Carolina, Dept Chem Engn, Columbia, SC 29028 USA
4.Pacific NW Natl Lab, Richland, WA 99352 USA

Recommended Citation:
Yan, Jingbo,Chen, Hao,Dogdibegovic, Emir,et al. High-efficiency intermediate temperature solid oxide electrolyzer cells for the conversion of carbon dioxide to fuels[J]. JOURNAL OF POWER SOURCES,2014,252(1):79-84.
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