Issue 1, 2012

Cobalt-based double-perovskite symmetrical electrodes with low thermal expansion for solid oxidefuel cells

Abstract

The fabrication of a solid oxide fuel cell (SOFC) with symmetrical anode/cathode electrodes is a practical strategy to reduce strain, promote co-sintering of the electrodes, and hence to improve stability and reliability. Non-stoichiometric Sr2Co1+xMo1−xO6 (x = 0.1, 0.15, 0.2) (SCMO) double perovskites are designed to be used as symmetrical anode/cathode electrodes for symmetrical SOFCs with La0.8Sr0.2Ga0.83Mg0.17O3 (LSGM) as electrolyte. As an individual anode or cathode, SCMO shows considerable electrochemical performance. A typical cell with Sr2Co1.15Mo0.85O6 as the symmetrical anode/cathode electrodes, the maximum power density reaches as high as 460 mW cm−2 at 800 °C. The thermal expansion coefficient (TEC) of SCMO ranges from 6 × 10−6 to 15 × 10−6 K−1 from room temperature to 900 °C, matching well that of the conventional LSGM electrolyte.

Graphical abstract: Cobalt-based double-perovskite symmetrical electrodes with low thermal expansion for solid oxide fuel cells

Article information

Article type
Paper
Submitted
23 Sep 2011
Accepted
27 Sep 2011
First published
02 Nov 2011

J. Mater. Chem., 2012,22, 225-231

Cobalt-based double-perovskite symmetrical electrodes with low thermal expansion for solid oxide fuel cells

T. Wei, Q. Zhang, Y. Huang and J. B. Goodenough, J. Mater. Chem., 2012, 22, 225 DOI: 10.1039/C1JM14756K

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