Novel hybrid polymer electrolyte membranes prepared by a silane-cross-linking technique for direct methanol fuel cells

Lin, Haidan; Zhao, Chengji; Ma, Wei; Shao, Kang; Li, Hongtao; Zhang, Yang; Na, Hui

doi:10.1016/j.jpowsour.2009.08.020

Cited by 21 publications

(19 citation statements)

References 37 publications

(40 reference statements)

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“…However, the sulfhydryl peak was no longer present in the spectrum, which indicated that the sulfhydryl group of MPTS was converted to a sulfonic acid group (HSO3 -). Similar behavior for FT-IR of the MPTS-treated zeolite data was reported elsewhere [44]. Nevertheless, the peak of the sulfonic acid group that appeared at 1,000-1,200 cm -1 did not appear in the MOR-MPTS spectra because they were overlapped by the peak of TO4 (Si, Al tetrahedral units) [5,38].…”

Section: Mpts Mor-mptes and Mor-mpdms Samples Regarding Mor-gmpts supporting

confidence: 83%

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Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

Prapainainar

Kanjanapaisit

Kongkachuichay

et al. 2016

Journal of Environmental Chemical Engineering

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(P. Prapainainar).2 Highlight  Silane treated mordenite composite membrane was used for DEFC.  Four types of silane coupling agents were treated on MOR surface.  Sulfhydryl group in MPTES provided sulfonic group for enhance proton conductivity.  MOR-MPTES/Nafion membrane had the highest selectivity at all temperature. AbstractMordenite (MOR) has been used to solve the alcohol crossover in direct ethanol fuel cells. However, the lack of compatibility has been a problem. This paper shows the compatibility improvement of MOR in a Nafion composite membrane for use in a fuel cell using four types of silane coupling agents: gamma-glycidoxypropyltrimethoxysilane (GMPTS), (3-mercaptopropyl) trimethoxysilane (MPTS), (3-Mercaptopropyl) triethoxysilane (MPTES) and (3-Mercaptopropyl) methyl-dimethoxysilane (MPDMS). The coupling agents were used to treat the MOR surface before mixing with Nafion. Each type of silane was treated carefully and differently, depending on its structure. Their characterizations were also described. The results showed that better compatibility and a noticeable reduction in ethanol permeability were achieved when using all silane-treated MOR in the composite. It was found that the Nafion/MOR-MPTES membrane had the highest proton conductivity at all temperature ranges from 30-70 o C. This was due to the fact that the sulfhydryl (-SH) functional group in MPTES provided the sulfonic group in its structure after the oxidation in the surface treatment process. These sulfonic groups at the MOR surface facilitated proton transport and improved the selectivity of the membrane.

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Section: Mpts Mor-mptes and Mor-mpdms Samples Regarding Mor-gmpts supporting

confidence: 83%

“…that the spectrum at 912 cm -1 was assigned to the epoxy characteristic band [44]. It was stated in the literature that after heating, hydrolysis-condensation and oxidation treatments, the epoxy peak was no longer present in the spectrum [45,46].…”

Section: Mpts Mor-mptes and Mor-mpdms Samples Regarding Mor-gmpts mentioning

confidence: 90%

Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

Prapainainar

Kanjanapaisit

Kongkachuichay

et al. 2016

Journal of Environmental Chemical Engineering

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“…Besides the organic compounds, inorganic compounds have been recently proposed as crosslinkers to fabricate crosslinked membrane electrolytes. The constituent particles could covalently crosslink with polymer backbones in order to enhance dimensional, chemical and mechanical stabilities of membrane materials . For example, Zhang and co‐workers reported a novel anion exchange membrane based on the bi‐guanidinium‐bridged polysilsesquioxane, which was fabricated via a sol–gel polymerization of an in‐house synthesized trimethoxysilane‐ended bi‐guanidinium monomer .…”

Section: Introductionmentioning

confidence: 99%

Strengthening Phosphoric Acid Doped Polybenzimidazole Membranes with Siloxane Networks for Using as High Temperature Proton Exchange Membranes

Yang

Gao

Wang

et al. 2017

Macro Chemistry & Physics

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Two silane compounds, i.e., ((chloromethyl)phenylethyl)trimethoxysilane (Ph‐Si) and 3‐chloropropyltriethoxysilane (Pr‐Si), are employed as covalent crosslinkers to fabricate high temperature proton exchange membranes based on polybenzimidazole (PBI) in order to better understand the correlation between the structure and the property of the crosslinked membranes. All the crosslinked PBI membranes display longer morphology durability over the neat PBI membrane toward the radical oxidation. The crosslinked membranes with the crosslinker containing a rigid group of phenylene (PBI‐Ph) show superior acid doping level, high conductivity, and excellent mechanical strength simultaneously, comparing to those with the crosslinker having a flexible alkyl chain (PBI‐Pr) and the pristine PBI based membrane. The technical feasibility for using as high temperature proton exchange membranes is demonstrated by the acid doped crosslinked PBI‐Ph membranes via fuel cell tests.

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“…In other side, the backbones from polysilocsane frameworks are able to interact with water molecules to facilitate transferring proton. Haidan et al [26] reported that polysilocsane bonds in composite poly(ether-cetone-arylena) membrane modified by silane are able to interact with water molecules to form water binding layer which facilitated proton hopping. The second reason is water uptake, protons are largely transferred through the PEMs either as watersolvated species or by passing from one water molecule to another.…”

Section: Proton Conductivitymentioning

confidence: 99%

Synthesis and Characterization of Chitosan/Phosphotungstic Acid-Montmorillonite Modified by Silane for DMFC Membrane

Permana¹,

Purwanto²,

Ramadhan³

et al. 2015

Indones. J. Chem.

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Novel hybrid polymer electrolyte membranes prepared by a silane-cross-linking technique for direct methanol fuel cells

Cited by 21 publications

References 37 publications

Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

Strengthening Phosphoric Acid Doped Polybenzimidazole Membranes with Siloxane Networks for Using as High Temperature Proton Exchange Membranes

Synthesis and Characterization of Chitosan/Phosphotungstic Acid-Montmorillonite Modified by Silane for DMFC Membrane

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