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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, K[Ketpang, Kriangsak]; Shanmugam, S[Shanmugam, Sangaraju]; Suwanboon, C[Suwanboon, Chonlada]; Chanunpanich, N[Chanunpanich, Noppavan]; Lee, D[Lee, Dongha]
- DGIST Authors
- Ketpang, K[Ketpang, Kriangsak]; Shanmugam, S[Shanmugam, Sangaraju]; Lee, D[Lee, Dongha]
- Issue Date
- Journal of Membrane Science, 493, 285-298
- Article Type
- Air; Artificial Membrane; Atmosphere; Biotechnological Procedures; Catalyst; Composite Membrane; Composite Membranes; Current Density; Electro-Chemical Impedance Spectroscopy (EIS); Electrochemical Analysis; Electrolyte; Electrolytes; Electrospinning; Energy Resource; Fuel Cells; Gas Diffusion; Gas Fuel Purification; Humidity; Impedance Spectroscopy; Infrared Spectroscopy; Ion Exchange; Low Relative Humidities; Management Capabilities; Membrane Conductance; Membrane Resistance; Membranes; Mesoporous Titanium Dioxide; Mesoporous Titanium Dioxide Nanotubes; Nafion Composite Membrane; Nafion Composite Membranes; Nanotube; Nanotubes; Ohmic Contacts; Pem Fuel Cell; Pem Fuel Cells; Perfluorosulfonic Acid; Polyelectrolytes; Polymer; Polymer Electrolyte Membrane Fuel Cell (PEMFC); Polymers; Priority Journal; Proton; Proton-Exchange Membrane Fuel Cells (PEMFC); Proton Transport; Scanning Electron Microscopy; Solid Electrolytes; Surface Area; Surface Charge; Temperature; Tensile Strength; Titanium; Titanium Dioxide Nanoparticle; Water Absorption; Water Conservation; Water Content; Water Management; Water Retention; Water Transport; X Ray Crystallography; X Ray Diffraction; Yarn; Young Modulus
- 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.
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