A Rotating Electrolyte Disc (RED) for Operation in Liquid Metal Anode SOFCs

Abstract

A novel Rotating Electrolyte Disc (RED) apparatus has been developed to determine parameters controlling mass transport of dissolved oxygen (and other gases) and oxidised species including metal oxide in liquid metal anode SOFCs. The validity of the concept and design for high temperature studies was first demonstrated by testing the setup in an aqueous system at ambient temperature (equimolar solution of ferrous and ferric chloride in KCl as supporting electrolyte). The diffusion coefficients have been determined for Fe2+ and Fe3+ by measuring the limiting oxidation and reduction diffusion-controlled currents. The obtained data have been compared with appropriate literature data. Preliminary testing of RED in molten tin electrodes is discussed.

Mechanistic Considerations of Liquid Metal Anode SOFCs Fueled with Hydrogen

“…Such an approach is adopted here. Another approach to the understanding of anode processes in LME SOFCs concerns the Rotating Electrolyte Disc (RED) (19) which offers the prospect of allowing the parameters controlling mass transport of dissolved species in the melt to be studied. Operation in mode CE provides a simpler system compared to other modes.…”

Mechanistic Studies of Liquid Metal Anode SOFCs

“…Such an approach is adopted here. Other approaches to the elucidation of anode processes in LME SOFCs include the Rotating Electrolyte Disc (RED) 25 which offers the prospect of allowing the parameters controlling mass transport of dissolved species in the melt to be studied.…”