Novel solid oxide cells with SrCo0.8Fe0.1Ga0.1O3-δ oxygen electrode for flexible power generation and hydrogen production

Meng, Xiuxia, Shen, Yichi, Xie, Menghan, Yin, Yimei, Yang, Naitao, Ma, Zi-Feng, Diniz Da Costa, Joao C. and Liu, Shaomin (2016) Novel solid oxide cells with SrCo0.8Fe0.1Ga0.1O3-δ oxygen electrode for flexible power generation and hydrogen production. Journal of Power Sources, 306 9: 226-232. doi:10.1016/j.jpowsour.2015.12.019


Author Meng, Xiuxia
Shen, Yichi
Xie, Menghan
Yin, Yimei
Yang, Naitao
Ma, Zi-Feng
Diniz Da Costa, Joao C.
Liu, Shaomin
Title Novel solid oxide cells with SrCo0.8Fe0.1Ga0.1O3-δ oxygen electrode for flexible power generation and hydrogen production
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2016-02-29
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2015.12.019
Open Access Status Not Open Access
Volume 306
Issue 9
Start page 226
End page 232
Total pages 7
Place of publication Amsterdam, NX, Netherlands
Publisher Elsevier
Language eng
Subject 2105 Renewable Energy, Sustainability and the Environment
2102 Energy Engineering and Power Technology
1606 Physical and Theoretical Chemistry
2208 Electrical and Electronic Engineering
Abstract This work investigates the performance of solid oxide cells as fuel cells (SOFCs) for power production and also as electrolysis cells (SOECs) for hydrogen production. In order to deliver this dual mode flexible operation system, a novel perovskite oxide based on Ga doped SrCoFeGaO (SCFG) is synthesized via a sol-gel method. Its performance for oxygen electrode catalyst was then evaluated. Single solid oxide cell in the configuration of Ni-YSZ|YSZ|GDC|SCFG is assembled and tested in SOFC or SOEC modes from 550 to 850 °C with hydrogen as the fuel or as the product, respectively. GDC is used to avoid the reaction between the electrolyte YSZ and the cobalt-based electrode. Under SOFC mode, a maximum power density of 1044 mW cm is obtained at 750 °C. Further, the cell delivers a stable power output of 650 mW cm up to 125 h at 0.7 V. In the electrolysis mode, when the applied voltage is controlled at 2 V, the electrolysis current density reaches 3.33 A cm at 850 °C with the hydrogen production rate up to 22.9 mL min cm (STP). These results reveal that SCFG is a very promising oxygen electrode material for application in both SOFC and SOEC.
Formatted abstract
This work investigates the performance of solid oxide cells as fuel cells (SOFCs) for power production and also as electrolysis cells (SOECs) for hydrogen production. In order to deliver this dual mode flexible operation system, a novel perovskite oxide based on Ga3+ doped SrCo0.8Fe0.1Ga0.1O3−δ (SCFG) is synthesized via a sol–gel method. Its performance for oxygen electrode catalyst was then evaluated. Single solid oxide cell in the configuration of Ni-YSZ|YSZ|GDC|SCFG is assembled and tested in SOFC or SOEC modes from 550 to 850 °C with hydrogen as the fuel or as the product, respectively. GDC is used to avoid the reaction between the electrolyte YSZ and the cobalt-based electrode. Under SOFC mode, a maximum power density of 1044 mW cm−2 is obtained at 750 °C. Further, the cell delivers a stable power output of 650 mW cm−2 up to 125 h at 0.7 V. In the electrolysis mode, when the applied voltage is controlled at 2 V, the electrolysis current density reaches 3.33 A cm−2 at 850 °C with the hydrogen production rate up to 22.9 mL min−1 cm−2 (STP). These results reveal that SCFG is a very promising oxygen electrode material for application in both SOFC and SOEC.
Keyword Electrolysis
Hydrogen production
Oxygen electrode
Perovskite
Solid oxide cell
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 21176146
21376143
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
 
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