A Novel Molten Oxide Fuel Cell Concept
V. V. Belousov, S. V. Fedorov
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70% confidenceA novel molten oxide fuel cell (MOFC) concept is proposed, utilizing a solid/molten oxide electrolyte with intergranular liquid channels for mechanical plasticity and high ionic conductivity.
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Abstract
Abstract We suggest a novel molten oxide fuel cell (MOFC) concept. The MOFC is based on the oxygen‐ion‐conducting solid/molten oxide electrolyte (so‐called liquid‐channel‐grain‐boundary‐structure, LGBS, material) consisting of TeO 2 solid grains and chemically compatible TeO 2 +Te 4 Bi 2 O 11 liquid electrolyte at the grain boundaries. The intergranular liquid channels provide the LGBS mechanical plasticity (ductility), which makes it easy to shape and alleviates problems due to thermal incompatibility with electrodes (CTE), and high ionic conductivity. The volume fraction of liquid varied from 0.15 to 0.17 at 600–640 °C. The cell performance has been examined by standard electrochemical methods. With air used as a cathode gas, the single cell showed the power 11.5 mW cm −2 at the current density 90 mA cm −2 , electrolyte thickness 2.5 mm, and temperature 640 °C.
Key findings
- The MOFC exhibits a power output of 11.5 mW cm⁻² at 90 mA cm⁻² current density, 2.5 mm electrolyte thickness, and 640 °C temperature.
- The volume fraction of liquid in the electrolyte varies from 0.15 to 0.17 at 600–640 °C.
- The MOFC shows improved mechanical properties and thermal compatibility with electrodes due to the liquid-channel-grain-boundary-structure (LGBS) material.
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Identifiers
- Journal
- Fuel Cells
- Year
- 2016