Alternative anode materials for solid oxide fuel cells

By John B. Goodenough, Yunhui Huang. 2007

388 citations recorded by the source corpus.

The electrolyte of a solid oxide fuel cell (SOFC) is an O2−-ion conductor. The anode must oxidize the fuel with O2− ions received from the electrolyte and it must deliver electrons of the fuel chemisorption reaction to a current collector. Cells operating on H2 and CO generally use a porous Ni/electrolyte cermet that supports a thin, dense electrolyte. Ni acts as both the electronic conductor and the catalyst for splitting the H2 bond; the oxidation of H2 to H2O occurs at the Ni/electrolyte/H2 triple-phase boundary (TPB). The CO is oxidized at the oxide component of the cermet, which may be the electrolyte, yttria-stabilized zirconia, or a mixed oxide-ion/electron conductor (MIEC). The MIEC is commonly a Gd-doped ceria. The design and fabrication of these anodes are evaluated. Use of natural gas as the fuel requires another strategy, and MIECs are being explored for this application. The several constraints on these MIECs are outlined, and preliminary results of this on-going investigation are reviewed.

Subfields: Catalysis, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/d773e455f26caedb61de79a07418d0023fe180e2

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In Catalysis

1. J. Hill
2. M. Cimenti

In Materials Chemistry

1. B. Zhu
2. M. Irshad
3. Amjad Ali
4. P. Tiwari
5. J. Hill
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7. R. Raza
8. M. K. Ullah

Citations in the corpus

• A Brief Description of High Temperature Solid Oxide Fuel Cell’s Operation, Materials, Design, Fabrication Technologies and Performance (2016, background): “Some cermet anodes also exhibit both electronic and ionic conduction known as mixed ionic electronic conduction (MIEC) and increase the reaction zone [10,35,72,79].”
• Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes (2009, background): “Several review papers [104-111] and books [112] have appeared in the last few years on alternative anode materials for SOFC.”