4.8 Article

Enhanced Oxygen Reduction Activity and Solid Oxide Fuel Cell Performance with a Nanoparticles-Loaded Cathode

期刊

NANO LETTERS
卷 15, 期 3, 页码 1703-1709

出版社

AMER CHEMICAL SOC
DOI: 10.1021/nl5043566

关键词

Solid oxide fuel cells; oxygen reduction reaction; lanthanum strontium manganite - yittria-stabilized zirconia; nanostructure; cathode

资金

  1. National Science Foundation of China [21376238, 21306189, 21076209, 51101146/E011002]
  2. Ministry of Science and Technology [2010CB732302, 2012CB215500, 2011AA050704]
  3. College of Arts and Sciences, University of Missouri - Kansas City (UMKC)
  4. University of Missouri Research Board

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Reluctant oxygen-reduction-reaction (ORR) activity has been a long-standing challenge limiting cell performance for solid oxide fuel cells (SOFCs) in both centralized and distributed power applications. We report here that this challenge has been tackled with coloading of (La,Sr)MnO3 (LSM) and Y2O3 stabilized zirconia (YSZ) nanoparticles within a porous YSZ framework. This design dramatically improves ORR activity, enhances fuel cell output (200-300% power improvement), and enables superior stability (no observed degradation within 500 h of operation) from 600 to 800 degrees C. The improved performance is attributed to the intimate contacts between nanoparticulate YSZ and LSM particles in the three-phase boundaries in the cathode.

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