Phosphonic acid-grafted mesostructured silica/Nafion hybrid membranes for fuel cell applications

Joseph, Jorphin; Tseng, Chi-Yung; Hwang, Bing‐Joe

doi:10.1016/j.jpowsour.2010.08.090

Cited by 46 publications

(17 citation statements)

References 60 publications

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“…Both composite membranes have better water uptake properties than the pristine Nafion. The amount of water uptake is proportional to the wt% of SiO 2 , as proposed by other groups . The IEC values of the pristine Nafion and 1‐ and 2‐wt% SiO 2 /Nafion composite membranes are 0.88, 0.95, and 0.86 meq g −1 , respectively.…”

Section: Resultssupporting

confidence: 53%

“…The amount of water uptake is proportional to the wt% of SiO 2 , as proposed by other groups. 27,28 The IEC values of the pristine Nafion and 1-and 2-wt% SiO 2 /Nafion composite membranes are 0.88, 0.95, and 0.86 meq g −1 , respectively. These results show that the 1-wt% SiO 2 /Nafion composite membrane yielded the largest IEC value, while the 2-wt% SiO 2 /Nafion composite membrane yielded the smallest IEC value.…”

Section: Methodsmentioning

confidence: 99%

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Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy

Son

Park

et al. 2019

Int J Energy Res

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Summary Air‐breathing proton exchange membrane fuel cells (AB‐PEMFCs) have a great potential for commercialization owing to their simple mechanical configuration and low cost compared with traditional proton exchange membrane fuel cells (PEMFCs). However, AB‐PEMFCs perform worse than traditional PEMFCs owing to the omission of the humidifier and a poor air supply system. In this study, hygroscopic metal oxide materials with good water absorption characteristics were employed in a Nafion membrane without humidification to compensate for the lack of performance owing to low proton conductivity. Among the various metal oxide materials, mesoporous structured silica has been synthesized with Nafion to increase the water content in nonhumidified conditions. The local morphological variation and surface charge distribution on the pristine Nafion and SiO2/Nafion composite membranes were analyzed by using multimode atomic force microscopy and force distance analyses. Several remarkable results were revealed, including considerable morphological changes and a locally separated water cluster network structure.

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Section: Resultssupporting

confidence: 53%

Section: Methodsmentioning

confidence: 99%

Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy

Son

Park

et al. 2019

Int J Energy Res

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“…However, since too fast a rate of solegel reaction will cause heterogeneity in hybrid membranes, more controllable methods remain to be explored [34]. Hybrid membranes embedded with in situ formed sulfonic acid-functionalized nanoparticles are intensively studied [29,30], whereas few efforts have been dedicated to those embedded with in situ formed phosphonic acidfunctionalized nanoparticles [18,35]. Theoretically, in situ method is an effective approach to introduce phosphonic acidfunctionalized nanoparticles into polymer matrix for improving the performance of PEMs.…”

Section: Introductionmentioning

confidence: 99%

Novel sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membrane by an in situ method for direct methanol fuel cells

Cao

et al. 2015

Journal of Power Sources

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“…The water uptake of SNN4T was 248%, which was considerably higher than that of SNN4 (205%). This is because the Si─O─Si network was formed on the surface of composite film to avoid moisture loss …”

Section: Resultsmentioning

confidence: 99%

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Zhao

Wei

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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Study on proton exchange membrane (PEM) with the aim toward excellent battery performance of PEM for fuel cells has attracted increasing attention. In this work, nanocellulose (CNC) aminated by KH792 noted as NN was prepared. CNC or NN/sulfophenylated poly(ether ether ketone ketone) (sPEEKK) nanocomposite membrane (SN) or (SNN) were produced by solution mixing. SNN was further coated with tetraethyl orthosilicate (TEOS) to obtain SNNT. The properties of sPEEKK, SN, SNN, and SNNT membranes were thoroughly investigated. The proton conductivity of SN4 was 0.22 S·cm−1 at 90 °C, while a proton conductivity of 0.30 S·cm−1 was obtained for SNN4, and an even higher value of 0.36 S·cm−1 at 90 °C was obtained for the TEOS‐coated SNN4 (SNN4T). Meanwhile, SNN4T showed high thermal stability, and its Td5 was as high as 318.2 °C. Furthermore, the composite membrane coated with TEOS also presented excellent oxidative stability. The mass of SNN2T after treated in Fenton agent for 1 h at 80 °C was still retained 96.2%, and it was not fully dissolved until 11 h. It was illustrated that aminated CNC/sPEEKK nanocomposite membranes coated with TEOS is a kind of promising materials as PEMs for fuel cells. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2190–2200

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Phosphonic acid-grafted mesostructured silica/Nafion hybrid membranes for fuel cell applications

Cited by 46 publications

References 60 publications

Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy

Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy

Novel sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membrane by an in situ method for direct methanol fuel cells

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

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Phosphonic acid-grafted mesostructured silica/Nafion hybrid membranes for fuel cell applications

Cited by 46 publications

References 60 publications

Study of morphological characteristics on hydrophilicity‐enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy

Study of morphological characteristics on hydrophilicity‐enhanced SiO 2 /Nafion composite membranes by using multimode atomic force microscopy

Novel sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membrane by an in situ method for direct methanol fuel cells

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

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Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy

Study of morphological characteristics on hydrophilicity‐enhanced SiO ₂ /Nafion composite membranes by using multimode atomic force microscopy