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Title: Regulation of Cathode Mass and Charge Transfer by Structural 3D Engineering for Protonic Ceramic Fuel Cell at 400 °C

Journal Article · · Advanced Functional Materials
ORCiD logo [1]; ORCiD logo [2];  [3];  [2]; ORCiD logo [2]; ORCiD logo [1];  [4]; ORCiD logo [2]
  1. Energy &, Environmental Science and Technology Idaho National Laboratory Idaho Falls ID 83415 USA, Department of Chemical &, Materials Engineering New Mexico State University Las Cruces NM 88003 USA
  2. Energy &, Environmental Science and Technology Idaho National Laboratory Idaho Falls ID 83415 USA
  3. Department of Computational Mechanics and Materials Idaho National Laboratory Idaho Falls ID 83415 USA
  4. Department of Chemical &, Materials Engineering New Mexico State University Las Cruces NM 88003 USA

Abstract Lowering the operating temperature (ideally below 400 °C) for solid oxide fuel cell (SOFC) technology deployment has been an important transition that introduces the benefit of reduced operational costs and system durability. However, the key technical issue limiting the transition is the sluggish cathodic performance, namely the oxygen reduction reaction (ORR) rate of the conventional sponge‐like cathode dramatically drops as the temperature reduces. In this paper, 3D engineering of a cathode is conducted on a protonic ceramic fuel cell to obtain an enhanced ORR between 400 and 600 °C. Compared with a cell using a conventional sponge‐like cathode, 3D engineering improves the cathode ORR by 41% at 400 °C with a peak power density of 0.410 W cm −2 . A phase field simulation is applied to assist the engineering by understanding the competition between the cathode mass and charge transfer with different cathode porosities. The results show that structural engineering of existing well‐developed cathodes is a simple and effective method to promote cathode ORR for low temperature SOFC by regulating the mass and charge transfer.

Sponsoring Organization:
USDOE
OSTI ID:
1787410
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 33 Vol. 31; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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