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Title: Thermal and Electrical Stability of Sr 0.9Y0.1CoO2.5+δ as a Promising Cathode for Intermediate-Temperature Solid Oxide Fuel Cells

Abstract

Here, the present study reports thermal and electrical properties of Sr1-xYxCoO2.5+δ (x = 0–0.40) as a promising cathode for intermediatetemperature solid oxide fuel cells. The results show that x = 0.10 is the best composition possessing a single primitive cubic perovskite structure, stable conductivity and the lowest polarization resistance. Thermogravimetric analysis indicates an oxygen intake from RT to ~375°C, above which oxygen loss occurs. The oxygen gain-loss behavior corresponds well with the conductivity increase-decrease trending, reflecting that oxygen-nonstoichiometry controls the hole-concentration (or oxidation-state of Co-ions). Electrochemical impedance spectroscopy analysis further reveals that the overall ORR polarization consists of a faster charge-transfer and a slower surface oxygen exchange.

Authors:
 [1];  [2];  [2];  [2];  [1];  [2]
  1. Yangtze Univ., Jingzhou, Hubei (China). Applied Physics and Information Technology Research Center; Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering
  2. Univ. of South Carolina, Columbia, SC (United States). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); Yangtze University
OSTI Identifier:
1437588
Grant/Contract Number:  
AR0000492; FE0023317
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 163; Journal Issue: 5; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Jiang, Long, Wang, Jie, Xiong, Xiaolei, Jin, Xinfang, Pei, Qiming, and Huang, Kevin. Thermal and Electrical Stability of Sr 0.9Y0.1CoO2.5+δ as a Promising Cathode for Intermediate-Temperature Solid Oxide Fuel Cells. United States: N. p., 2016. Web. doi:10.1149/2.0361605jes.
Jiang, Long, Wang, Jie, Xiong, Xiaolei, Jin, Xinfang, Pei, Qiming, & Huang, Kevin. Thermal and Electrical Stability of Sr 0.9Y0.1CoO2.5+δ as a Promising Cathode for Intermediate-Temperature Solid Oxide Fuel Cells. United States. doi:10.1149/2.0361605jes.
Jiang, Long, Wang, Jie, Xiong, Xiaolei, Jin, Xinfang, Pei, Qiming, and Huang, Kevin. Thu . "Thermal and Electrical Stability of Sr 0.9Y0.1CoO2.5+δ as a Promising Cathode for Intermediate-Temperature Solid Oxide Fuel Cells". United States. doi:10.1149/2.0361605jes. https://www.osti.gov/servlets/purl/1437588.
@article{osti_1437588,
title = {Thermal and Electrical Stability of Sr 0.9Y0.1CoO2.5+δ as a Promising Cathode for Intermediate-Temperature Solid Oxide Fuel Cells},
author = {Jiang, Long and Wang, Jie and Xiong, Xiaolei and Jin, Xinfang and Pei, Qiming and Huang, Kevin},
abstractNote = {Here, the present study reports thermal and electrical properties of Sr1-xYxCoO2.5+δ (x = 0–0.40) as a promising cathode for intermediatetemperature solid oxide fuel cells. The results show that x = 0.10 is the best composition possessing a single primitive cubic perovskite structure, stable conductivity and the lowest polarization resistance. Thermogravimetric analysis indicates an oxygen intake from RT to ~375°C, above which oxygen loss occurs. The oxygen gain-loss behavior corresponds well with the conductivity increase-decrease trending, reflecting that oxygen-nonstoichiometry controls the hole-concentration (or oxidation-state of Co-ions). Electrochemical impedance spectroscopy analysis further reveals that the overall ORR polarization consists of a faster charge-transfer and a slower surface oxygen exchange.},
doi = {10.1149/2.0361605jes},
journal = {Journal of the Electrochemical Society},
number = 5,
volume = 163,
place = {United States},
year = {2016},
month = {1}
}

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