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Degradation effects in polymer electrolyte membrane fuel cell stacks by sub-zero operation—An in situ and ex situ analysis

Chemical EngineeringElectrical EngineeringEngineeringEx Situ AnalysisEnergy StorageProton-exchange MembranePolymer MembranesDegradation EffectsElectrochemical CellElectrochemical ProcessPolymer MembraneElectrochemistrySub-zero Operation—an