Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1998-05-06
2000-03-28
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204256, 204258, 204265, 204266, 204282, C25B 900, C25B 904, C25B 1508
Patent
active
060427035
ABSTRACT:
An electrochemical device for separating oxygen from an oxygen-containing gas comprises a plurality of planar ion-conductive solid electrolyte plates and electrically-conductive gas-impermeable interconnects assembled in a multi-cell stack. Electrically-conductive anode and cathode material is applied to opposite sides of each electrolyte plate. A gas-tight anode seal is bonded between the anode side of each electrolyte plate and the anode side of the adjacent interconnect. A biasing electrode, applied to the anode side of each electrolyte plate between the anode seal and the edge of the anode, eliminates anode seal failure by minimizing the electrical potential across the seal. The seal potential is maintained below about 40 mV and preferably below about 25 mV. A gas-tight seal is applied between the cathode sides of each electrolyte plate and the adjacent interconnect such that the anode and cathode seals are radially offset on opposite sides of the plate. The combination of biasing electrodes and offset seals is particularly effective in eliminating anode seal failure.
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Adler Stuart
Cutler Raymond Ashton
Henderson Brett Tamatea
Ludlow Jimmy
Richards Robin Edward
Air Products and Chemicals Inc.
Fernbacher John M.
Valentine Donald R.
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