Performance of the vapor fed direct alcohol phosphoric acid fuel cell

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Journal titleJournal of the Electrochemical Society
SubjectCell performance; CO poisoning; Comprehensive studies; Conventional polymers; Electrode assemblies; Gas diffusion layers; Higher temperatures; Microporous layers; Nafion membrane; Operating condition; Performance effect; Performance improvements; Stream pressure; Structure improvement; Vapor composition; Electrolytes; Ethanol; Ethanol fuels; Methanol; Methanol fuels; Phosphoric acid; Phosphoric acid fuel cells (PAFC); Platinum; Proton exchange membrane fuel cells (PEMFC); Silicon carbide; Vapors
AbstractDue to improved kinetics and reduced CO poisoning effects, higher temperature alcohol fuel cells have been shown to have higher activity and increased performance output when compared to lower temperature alcohol fuel cells. In this work, the Direct Alcohol Phosphoric Acid Fuel Cell (DAPAFC) with methanol and ethanol as reactant fuels, and Pt and PtRu as catalysts is studied. The electrolyteseparator consists of Phosphoric Acid in a Silicon Carbide (SiC) matrix and replaces conventional polymer electrolyte or PBI membranes. Comprehensive studies are conducted to demonstrate the performance effects of the Gas Diffusion Layer (GDL), Micro-porous Layer (MPL) and such parameters as the stream pressures, higher temperature operation (120-180°C), and the thickness of the SiC separator, etc. Results show that at the same operating conditions, the cell performance is comparable to that of a vapour fed Nafion membrane based fuel cell. Structure improvement of the Phosphoric Acid Electrode Assembly (PAEA) and reactant vapor composition can significantly improve durability. This type of fuel cell demonstrates performance improvement and stability in a higher temperature range than is possible with the conventional PEMFC. © 2012 The Electrochemical Society.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation (IFCI-IIPC)
Peer reviewedYes
NPARC number21269225
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Record identifier69655766-f31b-43f2-80b8-b3e324ad189d
Record created2013-12-12
Record modified2016-05-09
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