Physical and electrochemical properties of Nafion/polypyrrole composite membrane for DMFC

Park, Ho Seok; Kim, Yo Jin; Hong, Won Hi; Lee, Hong Kee

doi:10.1016/j.memsci.2005.07.019

Cited by 65 publications

(17 citation statements)

References 19 publications

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“…2. It is evident that there are three steps of weight losing involved for the three surfactants modified Nafion membranes which is in accordance with the literatures [34,35]. The first weight loss stage was assigned to the desulfonation, which is observed ranging from 250 to 400°C.…”

Section: Resultssupporting

confidence: 88%

Effects of different kinds of surfactants on Nafion membranes for all vanadium redox flow battery

Teng

Dai

2014

J Solid State Electrochem

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To investigate the effects of different surfactants on the properties of Nafion membrane, recast Nafion membranes were prepared with cationic (tetramethylammonium bromide (TMAB)), anionic (sodium dodecyl sulfate (SDS)), and nonionic surfactants (Triton X-100 (TX-100)). The prepared composite membranes were analyzed by Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), AFM, WXRD, and small-angle X-ray scattering (SAXS) to investigate the microstructure of the membrane. The properties of the composite membrane, including the water uptake, ion exchange capacity, proton conductivity, VO 2+ permeability, water transport, as well as the single cell performance are evaluated in detail. Results show that both the physical and electrochemical properties of the surfactant-modified Nafion membranes were quite different from the unmodified recast Nafion (r-Nafion) membrane. Vanadium redox flow battery (VRB) single cell tests indicate that the nonionic modified Nafion membrane possesses the best comprehensive performances among the three surfactants modified and r-Nafion membranes. At current density of 40-80 mA cm −2 , the average energy efficiency (EE) of the VRB with TX-100 Nafion membrane is 2.6 % higher than that of unmodified r-Nafion membrane, while the average EE of the VRB with TMAB/Nafion is 3.2 % lower than that of r-Nafion membrane. Another important effect of surfactants on the Nafion is the water transport behavior across the different membranes. TMAB can decrease the water transport across Nafion membrane, while the SDS and TX-100 can slightly increase the water transport across Nafion membrane.

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Section: Resultssupporting

confidence: 88%

Effects of different kinds of surfactants on Nafion membranes for all vanadium redox flow battery

Teng

Dai

2014

J Solid State Electrochem

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“…Today, PPy is used in numerous applications, including electrochemical capacitors, electrochromic devices, batteries, actuators and sensors [14]. PPy has been used as a major component in low-temperature fuel cells such as membranes [15,16], bipolar plates [17,18] and electrocatalysts [19e21] in order to improve the performance. PPy is used as catalyst support to replace partially carbon support and the polyelectrolyte (such as Nafion) in the electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon ratio in the polypyrrole/carbon composite catalyst support on PEM fuel cell performance

Daş

Yurtcan

2016

International Journal of Hydrogen Energy

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“…Park et al [102] reported a noticeable reduction of the methanol uptake in Nafion/polypyrrole composite membranes, which is accompanied by a similar decrease in the water sorption. 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.…”

Section: Alcohol Uptakementioning

confidence: 88%

“…Organic/Nafion blends can be classified as having a small barrier effect (P r > 0.25), as the case of PPy [102][103][104], PPO [108,109], PFA [110], sPF [116], PPV [123], PVP [124], PE [129], sPEEK [133][134][135], sPAEK [136], PVI [138], PTFE [142], sPOSS [144], PEDT [146], PR [147], PM [148], PSSA [150], and AMPS [152], moderate barrier effect (0.04 < P r < 0.25), as the case of PETE [130], sPAES [137], or strong barrier effect (P r < 0.04), as the case of PAES [137] and PFEP [143].…”

Section: Methanol Permeabilitymentioning

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%

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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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Physical and electrochemical properties of Nafion/polypyrrole composite membrane for DMFC

Cited by 65 publications

References 19 publications

Effects of different kinds of surfactants on Nafion membranes for all vanadium redox flow battery

Effects of different kinds of surfactants on Nafion membranes for all vanadium redox flow battery

Effect of carbon ratio in the polypyrrole/carbon composite catalyst support on PEM fuel cell performance

Membranes for Direct Alcohol Fuel Cells

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