Influence of oxidation state of polyaniline on physicochemical and transport properties of Nafion/polyaniline composite membrane for DMFC

Choi, Bong Gill; Park, Ho Seok; Im, Hun Suk; Kim, Yo Jin; Hong, Won Hi

doi:10.1016/j.memsci.2008.06.061

Cited by 68 publications

(28 citation statements)

References 33 publications

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“…4. Water uptake as a function of relative humidity for the different composite membranes and Nafion ® 112 at 30 • C. performance by using Nafion/polyaniline composite membrane is due to the favorable interactions between ionic channels and PANIs [20].…”

Section: Resultsmentioning

confidence: 99%

Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity

Yang

Shen

Varcoe

et al. 2009

Journal of Power Sources

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Section: Resultsmentioning

confidence: 99%

Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity

Yang

Shen

Varcoe

et al. 2009

Journal of Power Sources

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“…The presence of absorption maxima at 400 and 800 nm, corresponding to polaron-π* and π-polaron transitions, is typical for polyaniline in eleraldinesalt form [2,23,24].…”

Section: Methodsmentioning

confidence: 97%

Influence of conditions of polyaniline synthesis in perfluorinated membrane on electrotransport properties and surface morphology of composites

Kononenko

Loza

Shkirskaya

et al. 2015

J Solid State Electrochem

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The conductivity, diffusion, and electroosmotic permeability of composites, obtained in different conditions of polyaniline synthesis on the surface or in volume of perfluorinated MF-4SK membrane, were studied. The oxidative polymerization of aniline was carried out in static conditions in mixture of monomer and oxidant solutions, in concentration field by method of successive diffusion of polymerization solutions through the membrane in water, and in an external electrical field. The concentration of polymerization solutions, the type of electron acceptors, duration of synthesis, and current density were varied to obtain a set of composites. The certain advantages of every method of polyaniline chemical template synthesis were revealed to prepare the materials with required set of the electrotransport characteristics.

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“…A Nafion/polyaniline membrane containing polyanilines with different oxidation states is reported [127] to reduce around 10 % the methanol uptake, particularly the oxidized state, along with a very small reduction of the water uptake. A similar study on Nafion/polyaniline membrane reported a larger reduction (40 %) of the methanol uptake, which reached 50 % when SiO 2 was added to the composite membrane, without any significant effect on the water uptake [125].…”

Section: Alcohol Uptakementioning

confidence: 99%

“…β r =1 Fig. 6.23 Selectivity plot for Nafion/organic compounds: PPy ( ) [102,103]; PBI ( ) [106,107]; PPO ( ) [108,109], PFA ( ) [110]; PVA ( ) [112][113][114]; PF ( ) [116]; PVdF ( ) [117][118][119][120]; PPV ( ) [123];PVP ( ) [124]; PANI ( ) [126][127][128]; PE ( ) [129]; β-CD ( ) [131]; sPEEK ( ) [133,134]; sPAEK ( ) [136]; sPAES ( ) [137]; PVI ( ) [138]; PVPy ( ) [139]; PTFE ( ) [142]; PFEP ( ) [143]; sPOSS ( ) [144]; PEDT ( ) [145,146]; PR ( ) [147]; PSSA ( ) [150]; SEBS ( ) [151]; AMPS ( ) [152]. Closed symbols correspond to layered composites Nafion membranes treated with supercritical CO 2 become more crystalline and a moderate increase in methanol selectivity is observed [166], although DMFC performance improved significantly [165].…”

Section: Methanol Selectivity Of Nafion Composite Membranesmentioning

confidence: 99%

Membranes for Direct Alcohol Fuel Cells

Corti

2013

Direct Alcohol Fuel Cells

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This chapter is devoted to summarize and discuss the main properties of ionomeric membranes used in direct alcohol PEM fuel cells. Although Nafion is the proton exchange membrane commonly used in methanol and other direct alcohol fuel cells, other proton and alkaline membranes are being investigated in order to improve the efficiency of DAFC. The goals in the development of this critical component of DAFC are: low cost, long durability, low alcohol permeability and high electrical conductivity. The last two properties can be combined in a single parameter, the membrane selectivity that accounts for the ratio between the proton and alcohol transport through the membrane. This parameter can be compared to that measured for Nafion to define a relative selectivity, which is a primary parameter to evaluate the potentiality of a ionomer material to be used in alcohol feed fuel cells.The vast catalogue of polymeric materials reviewed here included Nafion composite with inorganic and organic fillers, and non-fluorinated proton conducting membranes such as sulfonated polyimides, poly(arylene ether)s, polysulfones, poly (vinyl alcohol), polystyrenes, and acid-doped polybenzimidazoles. Anionexchange membranes are also discussed because of the facile electro-oxidation of alcohols in alkaline media and because of the minimization of alcohol crossover in alkaline direct alcohol fuel cells.The performance of different types of membranes in direct alcohol fuel cells, mainly methanol, are summarized and discussed in order to identify the most promissory ones. The lack of correlation between the relative selectivity and fuel cell performance of the membranes indicates that the architecture of the three

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Influence of oxidation state of polyaniline on physicochemical and transport properties of Nafion/polyaniline composite membrane for DMFC

Cited by 68 publications

References 33 publications

Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity

Nafion/polyaniline composite membranes specifically designed to allow proton exchange membrane fuel cells operation at low humidity

Influence of conditions of polyaniline synthesis in perfluorinated membrane on electrotransport properties and surface morphology of composites

Membranes for Direct Alcohol Fuel Cells

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