System and method for operating a high temperature fuel cell as a back-up power supply with reduced performance decay

System and method for operating a high temperature fuel cell as a back-up power supply with reduced performance decay

A method is provided for reducing degradation in a fuel cell assembly, including at least one fuel cell with a PBI membrane, during standby, operation. The method may include electrochemically consuming an oxidant from a cathode coupled to the PBI membrane in response to a disconnection of an extern...

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Hauptverfasser: Song, Yang, Kabir, Zakiul, Evans, Craig, Qiu, Lin, Maricle, Donald L
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Sprache:eng
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creator Song, Yang
Kabir, Zakiul
Evans, Craig
Qiu, Lin
Maricle, Donald L
description A method is provided for reducing degradation in a fuel cell assembly, including at least one fuel cell with a PBI membrane, during standby, operation. The method may include electrochemically consuming an oxidant from a cathode coupled to the PBI membrane in response to a disconnection of an external load and supplying fuel to remove or electrochemically consume any back-diffused oxidant to the associated fuel cell sufficient to replace or consume the back-diffused oxidant while the external load is removed, and/or also may include controlling a standby temperature of the fuel cell. In this way, it may be possible to avoid increased cell voltage decay associated with degradation of the PBI in a simple and cost effective system.
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title System and method for operating a high temperature fuel cell as a back-up power supply with reduced performance decay
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