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Efficient water management of composite membranes operated in polymer electrolyte membrane fuel cells under low relative humidity

Efficient water management of composite membranes operated in polymer electrolyte membrane fuel cells under low relative humidity
Ketpang, KriangsakShanmugam, SangarajuSuwanboon, ChonladaChanunpanich, NoppavanLee, Dongha
DGIST Authors
Shanmugam, SangarajuLee, Dongha
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Management CapabilitiesMembrane ConductanceMembrane ResistanceMemBRANESMesoporous Titanium DioxideMesoporous Titanium Dioxide NanotubesNAFIONNafion Composite MembraneNafion Composite MembranesNANOCOMPOSITE MemBRANENANOPARTICLESNanotubeNANOTUBESOhmic ContactsPem Fuel CellPem Fuel CellsPerfluorosulfonic ACIDPERFORMANCEPolyelectrolytesPolymerPolymer Electrolyte Membrane Fuel CellPolymer Electrolyte Membrane Fuel Cell (PemFCs)PolymersPriority JournalProtonProton Exchange Membrane Fuel Cells (PemFC)Proton TransportScanning Electron MicroscopySilicotungstic ACIDSolid ElectrolytesSurface AreaSurface ChargeTemPERATURETensile StrengthTitaniaTitaniumTitanium Dioxide NanoparticleWater AbsorptionWater ConservationWater ContentWater ManagementWater ManagementWater RetentionWater TransportX Ray CrystallographyX Ray DiffractionYarnYoung ModulusAirArticleArtificial MembraneAtmosphereBiotechnological ProceduresCatalystComposite MembraneComposite MembranesCurrent DensityElectrochemical AnalysisElectrochemical Impedance SpectroscopyELECTROLYTEElectrolytesElectrospinningELEVATED-TemPERATUREEnergy ResourceENHANCED PROTON CONDUCTIVITYFuel CellsGas DiffusionGas Fuel PurificationHIGH-TemPERATUREHUMIDITYHYBRID MemBRANESImpedance SpectroscopyInfrared SpectroscopyIon ExchangeLow Relative Humidities
High performance and durable electrolyte membrane operated in polymer electrolyte membrane fuel cells (PEMFCs) under low relative humidity (RH) has been achieved by incorporating various diameter sizes of mesoporous hygroscopic TiO2 nanotubes (TNT) in a perfluorosulfonic acid (Nafion®) membrane. Porous TNTs with different tube diameters are synthesized by thermal annealing the electrospun polymer containing titanium precursor mat at 600°C under an air atmosphere. The diameter of the TNT is significantly controlled by changing the concentration of the precursor solution. Compared to a commercial membrane (Nafion, NRE-212), the Nafion-TNT-10 composite membrane operated under 100% RH at 80°C generates about 1.3 times higher current density at 0.6V, and 3.4 times higher maximum power density operated under dry conditions (18% RH at 80°C). In addition, the Nafion-TNT-10 composite membrane also exhibits stable and durable operation under dry conditions. The remarkably high performance of the Nafion-TNT-10 composite membrane is mainly attributed to the significant reduction of the ohmic resistance as well as the improvement of cathode catalyst utilization by incorporating TNTs, which greatly enhances the water retention and the water management capability through the membrane. Furthermore, Nafion-TNT membranes exhibit superior mechanical property. © 2015 Elsevier B.V.
Elsevier B.V.
Related Researcher
  • 상가라쥬샨무감 Shanmugam, Sangaraju 에너지공학과
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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Appears in Collections:
Department of Energy Science and Engineering Advanced Energy Materials Laboratory 1. Journal Articles
Division of Intelligent Robotics 1. Journal Articles


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