Y2Mo3O12–Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode catalyst for proton-conducting solid oxide fuel cells
(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
- Lin, Peiyi ; Xu, Xi ; Yu, Shoufu ; Yin, Yanru ; Andersson, Martin LU and Bi, Lei
- organization
- publishing date
- 2022-12
- 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}}, }