Nafion composite membranes

V. Ramani, H.R. Kunz, and J.M. Fenton, Stabilized Heteropolyacid/Nafion Composite Membranes for Elevated Temperature/Low Relative Humidity PEFC Operation, Electrochimica Acta, 50, 1181-87 (2005). [Pg.165]

Yang, C., Srinivasan, S., Bocarsly, A. B., Tulyani, S. and Benziger, J. B. 2004. A comparison of physical properties and fuel cell performance of Nafion and zirconium phosphate/Nafion composite membranes. Journal of Membrane Science 237 145-161. [Pg.188]

K.T. Adjemian, S.J. Lee, S. Srinivasan, J. Benziger, and A.B. Bocarsly. Sihcon oxide Nafion composite membranes for proton-exchange membrane fuel cell operation at 80-140 degrees C. Journal of the Electrochemical Society 149, A256-A261 2002. [Pg.818]

Develop a solid superacid-Nafion composite membrane electrode assembly (MEA) with the following components ... [Pg.297]

F. Damay, L.C. Klein, Transport properties of Nafion composite membranes for proton-exchange mem-... [Pg.86]

The most studied Nafion composite membranes with organic fillers include blends of Nafion with polypyrrole, polybenzimidazole, poly(vinyl alcohol), polyvinylidene fluoride, polyanfline, sulftmated poly(ether ether ketone), and poly(tetrafluoroethylene). [Pg.21]

Other reported method to prepare inorganic/Nafion composite membranes is the colloidal [56] or ionic impregnation [75-78, 87, 93], where the inorganic filler is introduced a colloidal dispersion into the membrane or by exchange of by the salt cation, like Zr" ", followed by salt precipitation with the corresponding acid. [Pg.128]

The acid-base Nafion composite membranes include blends of Nafion with polypyrrole (PPy) [98-104], polybenzimidazole (PBI) [105-107], poly (propyleneoxide) (PPO) [108, 109], polyfurfuryl alcohol (PFA) [110], poly(vinyl alcohol) (PVA) [111-115], sulfonated phenol-formaldehyde (sPF) [116], polyvinylidene fluoride (PVdF) [117-122], poly(p-phenylene vinylene) (PPV) [123], poly(vinyl pyrrolidone) (PVP) [124] polyanifine (PANI) [125-128], polyethylene (PE) [129], poly(ethylene-terephtalate) [130], sulfated p-cyclodextrin (sCD) [131], sulfonated poly(ether ether ketone) (sPEEK) [132-135], sulfonated poly(aryl ether ketone) (sPAEK) [136], poly(arylene ether sulfone) (PAES) [137], poly(vinylimidazole) (PVl) [138], poly(vinyl pyridine) (PVPy) [139], poly (tetrafluoroethylene) (PTFE) [140-142], poly(fluorinated ethylene-propylene) [143], sulfonated polyhedral oligomeric silsesquioxane (sPOSS) [144], poly (3,4-ethylenedioxythiophene) (PEDT) [145, 146], polyrotaxanes (PR) [147], purple membrane [148], sulfonated polystyrene (PSSA) [149, 150], polystyrene-b-poly(ethylene-ran-butylene)-bpolystyrene (SEES) [151], poly(2-acrylamido-2-methyl-l-propanesulphonic acid-co-l,6-hexanediol propoxylate diacrylate-co-ethyl methacrylate) (AMPS) [152], and chitosan [31]. A binary PVA/chitosan [153] and a ternary Nafion composite with PVA, polyimide (PI) and 8-trimethoxy silylpropyl glycerin ether-1,3,6-pyrenetrisulfonic acid (TSPS) has also been reported [154]. [Pg.129]

A few examples of Nafion composite membranes with polymers and inorganic compotmds has been reported, such as poly(ethylene glycol) (PEG)/Si02 [155], PTFE/S102 [156], chitosan/phosphotungstic acid [157], PVI/Pd [158], and PBI/zirconium phosphate [159]. [Pg.130]

The preference of Nafion for up taking methanol over water is certainly an undesirable property for DMFC using this proton conducting membrane. It would be worth to review the effect of inorganic or organic Nafion composite membranes on the sorption of water-methanol from the liquid phase and on the partition constant. The few reported studies include Nafion/sulfonated organosilica [47] and Nafion/zirconium phosphate [78], where a reduction of the total liquid uptake is observed for the composites in methanol solutions up to 10 M, attributed to a reduction of the free volume in the ionic clusters. [Pg.143]

In summary, there is a lack of information on the separate uptake of methanol and water in Nafion composite membranes which preclude any conclusion about the partition of methanol, while the effect of the filler on the liquid sorption, as noted in the case of the uptake of pure methanol (Sect. 6.5.1), seems to be complex and not easy to assess. [Pg.144]

As discussed in Sect. 6.4.3 in the case of methanol permeability through Nafion composite membranes, proton conductivity along is not a criteria for an optimal DMFC membrane. Therefore, in the next Section, membrane selectivity to methanol and other alcohols will be critically reviewed. [Pg.156]

The pattern shown in Figs. 6.22 and 6.23, with most of the Nafion/composite membranes located in the B2 octant has also been observed by Pivovar and coworkers [181] for sulfonated poly(aryl ether)-type membranes. In order to analyze in detail cross-influencing parameters, these authors have defined four zones in the B2 octant, as indicated in Fig. 6.25. [Pg.159]

Some PVA-based membranes showing modest selectivities, like sulfonated PVA [339] and PVA/PSSA/mordenite [361] exhibit unexpected high MPD (81 and 74 mW.cm , respectively) at 70 °C. PVA/poly(ether sulfone)/PWA membranes [354], with very low selectivity, show MPD in the range 95-117 mW.cm at 80 °C. In summary, the performance of DMFC with PVA-based membranes could not yet overpass the results obtained with Nafion composite membranes, although some promising results have been obtained during the last years. Indeed, the results shown in Table 6.3 forNafi(Mi/PVA blends [114] and PVA-coated Nafion membranes are superior to those obtained with PVA-based membranes. [Pg.169]

Yen CY, Lee CH, Lin YF, Lin HL, Hsiao YH, Liao SH, Chuang CY, Ma CCM (2007) Sol-gel derived sulfonated-silica/Nafion composite membrane for direct methanol fuel cell. J Power Sources 173 36 14... [Pg.207]

Jin Y, Qiao S, Zhang ZP, Xu ZP, Smart S, Diniz da Costa JC, Lu GQ (2008) Novel Nafion composite membranes with mesoporous silica nanospheres as inorganic fillers. J Power... [Pg.207]

Byun SC, Jeong YJ, Park JW, Kim SD, Ha HY, Kim WJ (2006) Effect of solvent and crystal size on the selectivity of ZSM-5/Nafion composite membranes fabricated by solution-casting method. Solid State Ion 177 3233-3243... [Pg.208]

Li X, Roberts EPL, Holmes SM, Zholobenko V (2007) Functionalized zeolite A-Nafion composite membranes for direct methanol fuel cells. Solid State Ion 178 1248-1255... [Pg.208]

Bauer F, Willert-Porada M (2005) Characterization of zirconium and titanium phosphates and direct methanol fuel cell (DMFC) performance of functionally graded Nafion composite membranes prepared out of them. J Power Sources 145 101-107... [Pg.209]

Yang HN, Lee JY, Jeong JY, Na Y, Kim WJ (2011) Cell performance of DMFC fabricated with H H—ETS-lO/Nafion composite membrane. Micropor Mesopor Mat 143 215-220... [Pg.209]

Ren S, Sun G, Li C, Song S, Xin Q, Yang X (2006) Sulfated zirconia-Nafion composite membranes for higher temperature direct methanol fuel cells. J Power Sources 157 724—726... [Pg.210]

Shroti N, Barbora L, Verma A (2011) Neodymium triflate modified Nafion composite membrane for reduced alcohol permeability in direct alcohol fuel cell. Int J Hydrogen Energ 36 14907-14913... [Pg.210]

Kang S, Peck DH, Park YC, Jung DH, Jang JH, Lee HR (2008) Hydroscopic strontium hydroxide/Nafion composite membrane for a direct methanol fuel cell. J Phys Chem Solids 69 1280-1283... [Pg.210]

Easton EB, Langsdorf BL, Hughes JA, Sultan J, Qi Z, Kaufinan A, Pickup PG (2003) Characteristics of polypyrrole/Nafion composite membranes in a direct methanol fuel cell. J Electrochem Soc 150 C735-C739... [Pg.210]

Zhu J, Sattler RR, Garsuch YO, Pickup PG (2006) Optimisation of polypyrrole/Nafion composite membranes for direct methanol fuel cells. Electrochim Acta 51 4052-4060... [Pg.210]

Li L, Zhang Y, Drillet JF, Dittmeyer R, Jtittner KM (2007) Preparation and characterization of Pt direct deposition on polypyrrole modified Nafion composite membrane for direct methanol fuel cell applications. Chem Eng J 133 113-119... [Pg.210]

Wang CH, Chen CHC, Du HY, Chen CP, Hwang JY, Chen LC, Shih HC, Stejskal J, Chen KH (2009) Low methanol-permeable polyaniline/Nafion composite membrane for direct methanol fuel cells. J Power Sources 190 279-284... [Pg.212]

Cho HD, Won J, Ha HY, Kang YS (2006) Nafion composite membranes containing rod-shape polyrotaxanes for direct methanol fuel cells. Macromol Res 14 214-219... [Pg.213]

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