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Y2Mo3O12–Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode catalyst for proton-conducting solid oxide fuel cells

Lin, Peiyi ; Xu, Xi ; Yu, Shoufu ; Yin, Yanru ; Andersson, Martin LU and Bi, Lei (2022) In Journal of Power Sources 551.
Abstract

The mismatch of the coefficients of thermal expansion between cathode and electrolyte is one of the thorniest problems for high-performance proton-conducting solid oxide fuel cells (H–SOFCs). Here one strategy is applied by introducing the negative thermal expansion component, Y2Mo3O12 (YMO), on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) cathode to overcome this difficulty. As a result, not only the electrolyte-cathode connection but also the cell performance is improved. The maximum power density of the cell using a composite cathode reaches 1010.9 mW cm−2 at 700 °C. The YMO softens the stress on the contact layer that keeps the cathode from... (More)

The mismatch of the coefficients of thermal expansion between cathode and electrolyte is one of the thorniest problems for high-performance proton-conducting solid oxide fuel cells (H–SOFCs). Here one strategy is applied by introducing the negative thermal expansion component, Y2Mo3O12 (YMO), on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) cathode to overcome this difficulty. As a result, not only the electrolyte-cathode connection but also the cell performance is improved. The maximum power density of the cell using a composite cathode reaches 1010.9 mW cm−2 at 700 °C. The YMO softens the stress on the contact layer that keeps the cathode from delamination, which is confirmed by simulation studies and experiments. Furthermore, the A-site defect on BSCF created by the reaction between YMO and BSCF also plays a positive role in the oxygen reduction reaction (ORR) activity. This study provided a new way to study and improve the thermo-mechanical stability and cell performance of H–SOFCs.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
BaSrCoFeO, Cathode catalyst, Proton-conductor, SOFC, Thermal expansion
in
Journal of Power Sources
volume
551
article number
232073
publisher
Elsevier
external identifiers
  • scopus:85139826009
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2022.232073
language
English
LU publication?
yes
id
82e60098-1248-46ac-9b59-0671a98f7ba8
date added to LUP
2022-12-06 11:44:17
date last changed
2023-11-07 00:04:37
@article{82e60098-1248-46ac-9b59-0671a98f7ba8,
  abstract     = {{<p>The mismatch of the coefficients of thermal expansion between cathode and electrolyte is one of the thorniest problems for high-performance proton-conducting solid oxide fuel cells (H–SOFCs). Here one strategy is applied by introducing the negative thermal expansion component, Y<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub> (YMO), on Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3-δ</sub> (BSCF) cathode to overcome this difficulty. As a result, not only the electrolyte-cathode connection but also the cell performance is improved. The maximum power density of the cell using a composite cathode reaches 1010.9 mW cm<sup>−2</sup> at 700 °C. The YMO softens the stress on the contact layer that keeps the cathode from delamination, which is confirmed by simulation studies and experiments. Furthermore, the A-site defect on BSCF created by the reaction between YMO and BSCF also plays a positive role in the oxygen reduction reaction (ORR) activity. This study provided a new way to study and improve the thermo-mechanical stability and cell performance of H–SOFCs.</p>}},
  author       = {{Lin, Peiyi and Xu, Xi and Yu, Shoufu and Yin, Yanru and Andersson, Martin and Bi, Lei}},
  issn         = {{0378-7753}},
  keywords     = {{BaSrCoFeO; Cathode catalyst; Proton-conductor; SOFC; Thermal expansion}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Power Sources}},
  title        = {{Y<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>–Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3-δ</sub> cathode catalyst for proton-conducting solid oxide fuel cells}},
  url          = {{http://dx.doi.org/10.1016/j.jpowsour.2022.232073}},
  doi          = {{10.1016/j.jpowsour.2022.232073}},
  volume       = {{551}},
  year         = {{2022}},
}