Sulfonated multiwalled carbon nanotube/sulfonated poly(ether sulfone) composite membrane with low methanol permeability for direct methanol fuel cells

Zirconium hydrogen phosphate / sulfonated poly (arylyene ether) s composite membranes has been prepared and evaluated by the unit cell test for direct methanol fuel cell (DMFC) applications. The comparison between the performances of zirconium hydrogen phosphate/ sulfonated poly (arylyene ether) s composite membranes and Nafion 115 shows that the unit cell performance with composite membrane was superior to that of Nafion, which makes zirconium hydrogen phosphate/ sulfonated poly (arylyene ether) s composite membrane a potential candidate for direct methanol fuel cells.

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Fabrication of low-methanol-permeability sulfonated poly(phenylene oxide) membranes with hollow glass microspheres for direct methanol fuel cells

Journal of Power Sources ◽

10.1016/j.jpowsour.2014.11.114 ◽

2015 ◽

Vol 276 ◽

pp. 309-319 ◽

Cited By ~ 29

Author(s):

Kisang Ahn ◽

Myeongjin Kim ◽

Kiho Kim ◽

Hyun Ju ◽

Ilgeun Oh ◽

...

Keyword(s):

Fuel Cells ◽

Direct Methanol Fuel Cells ◽

Methanol Permeability ◽

Hollow Glass Microspheres ◽

Hollow Glass ◽

Phenylene Oxide ◽

Direct Methanol ◽

Methanol Fuel Cells ◽

Oxide Membranes ◽

Sulfonated Poly

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Chemically stable thioether cross-linked membranes derived from sulfonated poly(arylene ether ketone)s for direct methanol fuel cells

High Performance Polymers ◽

10.1177/0954008316684932 ◽

2017 ◽

Vol 30 (2) ◽

pp. 129-138 ◽

Cited By ~ 2

Author(s):

Ye Li ◽

Bo Yang ◽

Shilin Wei ◽

Chengzhen Geng ◽

Ming Kang ◽

...

Keyword(s):

Fuel Cells ◽

Direct Methanol Fuel Cells ◽

Methanol Permeability ◽

Arylene Ether ◽

Direct Methanol ◽

Ether Ketone ◽

Methanol Fuel Cells ◽

Cross Linker ◽

The Cross ◽

Sulfonated Poly

A series of thioether cross-linked membranes based on sulfonated poly(arylene ether ketone)s containing propenyl groups were prepared to solve the problem of high methanol permeability for proton electrolyte membrane in direct methanol fuel cells (DMFCs). For this purpose, 4,4′-thiobisbenzenethiol was selected as cross-linker, and the cross-linked structure was formed via thiol-ene click chemical reaction between propenyl and thiol groups. Compared with pristine membrane, the thioether cross-linked membranes exhibited improved mechanical properties and dimensional stabilities. As the cross-linker increased, the swelling ratio decreased from 11.01% to 8.64% at 20°C and from 15.18% to 10.69% at 80°C. Furthermore, the modified membranes exhibited reduced methanol permeability coefficients (down to 4.03 × 10−7 cm2 s−1), which was nearly half of the pristine membrane (7.66 × 10−7 cm2 s−1). Due to the thioether units, the cross-linked membranes showed enhanced oxidative stabilities, and the longest elapsed time in Fenton’s reagent was 225 min, which was 2.5 times longer than that of pristine polymeric membrane. Although the proton conductivity decreased upon the addition of cross-linker agent, the selectivity value increased due to the lower methanol permeability. Thus, all the results implied that the thioether cross-linked membranes were promising alternative materials for DMFCs application.

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Development of Inorganic-organic Membranes Consisting of ZrO2·nH2O and Sulfonated-PES for Direct Methanol Fuel Cells

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v15i2.75 ◽

2012 ◽

Vol 15 (2) ◽

pp. 83-88 ◽

Cited By ~ 2

Author(s):

Takayuki Hirashige ◽

Tomoichi Kamo ◽

Takao Ishikawa ◽

Takeyuki Itabashi

Keyword(s):

Proton Conductivity ◽

Composite Membrane ◽

Direct Methanol Fuel Cells ◽

Composite Membranes ◽

Methanol Permeability ◽

Maximum Power Density ◽

Trade Off ◽

Direct Methanol ◽

Methanol Fuel Cells ◽

Sulfonated Poly

We investigated inorganic-organic membranes consisting of sulfonated-poly(ether sulfone) (S-PES) and ZrO2·nH2O with the aim of improving proton conductivity and blocking methanol. We prepared excellent uniform membranes by the method using ZrOCl28H2O as a precursor. The proton conductivity of the ZrO2·nH2O/S-PES (EW=850) composite membrane with 50wt% ZrO2·nH2O content was about four times higher than that of S-PES (EW=850). On the other hand, the methanol permeability of the ZrO2·nH2O/S-PES (EW=850) composite membrane with 50wt% ZrO2·nH2O content was almost the same as that of S-PES (EW=850). These results mean in the composite membranes, the trade-off relationship between proton conductivity and methanol permeability found in S-PES was improved. The initial I-V performance of an MEA consisting of the ZrO2·nH2O/S-PES (EW=850) composite membrane with 50wt% ZrO2·nH2O content showed a maximum power density of 65 mW cm-2 at 260 mA cm-2.

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A Robust Composite Proton Exchange Membrane of Sulfonated Poly (Fluorenyl Ether Ketone) with an Electrospun Polyimide Mat for Direct Methanol Fuel Cells Application

Polymers ◽

10.3390/polym13040523 ◽

2021 ◽

Vol 13 (4) ◽

pp. 523

Author(s):

Geng Cheng ◽

Zhen Li ◽

Shan Ren ◽

Dongmei Han ◽

Min Xiao ◽

...

Keyword(s):

Fuel Cells ◽

Composite Membrane ◽

Direct Methanol Fuel Cells ◽

Oxidation Stability ◽

Proton Exchange Membranes ◽

Proton Exchange ◽

Direct Methanol ◽

Ether Ketone ◽

Methanol Fuel Cells ◽

Sulfonated Poly

As a key component of direct methanol fuel cells, proton exchange membranes with suitable thickness and robust mechanical properties have attracted increasing attention. On the one hand, a thinner membrane gives a lower internal resistance, which contributes highly to the overall electrochemical performance of the cell, on the other hand, strong mechanical strength is required for the application of proton exchange membranes. In this work, a sulfonated poly (fluorenyl ether ketone) (SPFEK)-impregnated polyimide nanofiber mat composite membrane (PI@SPFEK) was fabricated. The new composite membrane with a thickness of about 55 μm exhibited a tensile strength of 35.1 MPa in a hydrated state, which is about 65.8% higher than that of the pristine SPFEK membrane. The antioxidant stability test in Fenton’s reagent shows that the reinforced membrane affords better oxidation stability than does the pristine SPFEK membrane. Furthermore, the morphology, proton conductivity, methanol permeability, and fuel cell performance were carefully evaluated and discussed.

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