Cathodic electrochemical deposition: a new strategy to enhance the activity and stability of silver cathodes for thin-film solid oxide fuel cells

Cited 1 time in webofscience Cited 0 time in scopus
  • Hit : 42
  • Download : 0
Thin-film-based solid oxide fuel cells with reduced electrolyte thickness have been developed in an effort to lower the operating temperatures and increase the cost competitiveness and lifetime of the devices. Although silver has gained a considerable amount of attention as a cathode material with excellent oxygen reduction activity at lower temperatures, thermal instability due to agglomeration is a major disadvantage associated with the use of silver. Many oxide coating methods have been suggested to overcome this problem, but the results remain unsatisfactory. Here, we propose cathodic electrochemical deposition (CELD) as a new strategy to improve the activity and stability of silver electrodes. Pr-doped ceria is coated onto a nanoporous silver film by CELD and analyzed by electron microscopy, mass spectrometry, and X-ray diffraction. AC impedance spectroscopy of symmetric cells (electrode vertical bar electrolyte vertical bar electrode) reveals that only a few minutes of CELD increases the electrode activity by approximately 33 times and achieves outstanding durability with no degradation, even at 550 degrees C for 50 hours. Electrolyte-supported single cells are also fabricated to demonstrate the enhanced performance of the Ag electrode created via the ceria overcoats.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-08
Language
English
Article Type
Article
Citation

JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.29, pp.14491 - 14497

ISSN
2050-7488
DOI
10.1039/d0ta02439b
URI
http://hdl.handle.net/10203/275863
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 1 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0