scholarly journals Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2638
Author(s):  
M. A. Abu-Saied ◽  
Emad Ali Soliman ◽  
Khamael M. Abualnaj ◽  
Eman El Desouky
Keyword(s):  
Thermal Stability ◽  
Direct Methanol Fuel Cells ◽  
Cost Effective ◽  
Efficiency Factor ◽  
Methanol Permeability ◽  
Poly Vinyl Alcohol ◽  
Noticeable Increase ◽  
Polyelectrolyte Membranes ◽  
Direct Methanol ◽  
Polyelectrolyte Membrane

In this study, chemically cross-linked PVA/PAMPS membranes have been prepared to be used in direct methanol fuel cells (DMFCs). The structural properties of the resultant membrane were characterized by use FTIR and SEM. Additionally, their thermal stability was assessed using TGA. Moreover, the mechanical properties and methanol and water uptake of membrane was studied. The obtained FTIR of PVA/PAMPS membranes revealed a noticeable increase in the intensity of adsorption peaks appearing at 1062 and 1220 cm−1, which correspond to sulfonic groups with the increasing proportion of PAMPS. The thermograms of these polyelectrolyte membranes showed that their thermal stability was lower than that of PVA membrane, and total weight loss gradually decreased with increasing the PAMPS. Additionally, the functional properties and efficiency of these polyelectrolyte membranes were significantly improved with increasing PAMPS proportion in these blends. The IEC of polymer blend membrane prepared using PVA/PAMPS ratio of 1:1 was 2.64 meq/g. The same membrane recorded also a methanol permeability coefficient of 2.5 × 10−8 cm2/s and thus, its efficiency factor was 4 × 105 greater than that previously reported for the commercial polyelectrolyte membrane, Nafion® (2.6 × 105). No significant increase in this efficiency factor was observed with a further amount of PAMPS. These results proved that the PVA:PAMPS ratio of 1:1 represents the optimum mass ratio to develop the cost-effective and efficient PVA/PAMPS blend membranes for DMFCs applications.

Preliminary Study of ABS/Chitosan Blend Polymer for DMFC Membranes

2019 ◽  
Vol 961 ◽  
pp. 23-29
Author(s):  
Nur Hidayati ◽  
Muhammad Mujiburohman ◽  
Hamid Abdillah ◽  
Herry Purnama ◽  
Arnaldi Dwilaksita ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Direct Methanol Fuel Cells ◽  
Low Cost ◽  
Polymer Electrolyte Membrane ◽  
Exchange Capacity ◽  
Methanol Permeability ◽  
Ion Exchange Capacity ◽  
Electrolyte Membrane ◽  
Direct Methanol ◽  
Blend Polymer

The low cost of ABS polymer and natural polymer chitosan offer attractive chemical and physical properties for direct methanol fuel cells (DMFC). In this contribution, investigation of blend membrane made of ABS and chitosan, and their characterization for water uptake, swelling degree and ion exchange capacity (IEC) and methanol crossover are reported. This membrane was also assessed for its intermolecular interactions and thermal stability using FTIR and TGA compared to the pristine membrane. The water absorption and IEC values were affected by membrane network structure. The polymer blend had better thermal stability and a reduction of methanol permeability, this indicated the viability of utilization these materials as polymer electrolyte membrane in DMFC

Suppression of methanol cross-over in novel composite membranes for direct methanol fuel cells

2009 ◽  
Vol 81 (12) ◽  
pp. 2309-2316 ◽  
Author(s):  
Yong Fang ◽  
Ruiying Miao ◽  
Tongtao Wang ◽  
Xindong Wang
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Direct Methanol Fuel Cells ◽  
Base Material ◽  
Proton Conductor ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Poly Vinyl Alcohol ◽  
Direct Methanol ◽  
Methanol Fuel Cells

A series of novel composite membranes was prepared by using poly(vinyl alcohol) (PVA) with polyimide (PI) as base material and 8-trimethoxysilylpropyl glycerine ether-1,3,6-pyrenetrisulfonic acid (TSGEPS) as proton conductor for direct methanol fuel cells (DMFCs). The parameters of membranes, including water sorption, hydrolysis stability, dimensional stability, proton conductivity, and methanol permeability were studied. The proton conductivity of the membranes is in the order of 10–2 S/cm, and the membranes show better resistance to methanol permeability (1.51 × 10–7 cm2 s–1) and better selectivity (20.6 × 104 S cm–3 s) than those of Nafion115 under the same measurement conditions.

Preparation and properties of semi-IPN proton exchange membranes based on SPEEK and cross-linked PSt-DVB for direct methanol fuel cells

2016 ◽  
Vol 29 (9) ◽  
pp. 1110-1117 ◽  
Author(s):  
Chunxia Zhao ◽  
Da He ◽  
Qiuxia Yang ◽  
Yuntao Li ◽  
Jie Yue
Keyword(s):  
Thermal Stability ◽  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Polymer Networks ◽  
Proton Exchange Membranes ◽  
Interpenetrating Polymer Networks ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Direct Methanol ◽  
Methanol Fuel Cells

Sulfonated poly(ether ether ketone)/poly(styrene-divinylbenzene) (SPEEK/PSt-DVB) semi-interpenetrating polymer networks (semi-IPNs) were prepared to be used as proton exchange membranes (PEMs) for direct methanol fuel cells (DMFCs) applications. The morphologies of the membranes were investigated using field emission scanning electron microscopy. The ion-exchange capacity, water uptake, proton conductivity, methanol permeability, mechanical properties, and the thermal stability were characterized for each of the various semi-IPN membranes and evaluated for DMFC suitability. The semi-IPN SPEEK/PSt-DVB structure provided better dimensional stability, thermal stability, and mechanical integrity than the pristine SPEEK membrane. The methanol diffusion coefficient of the SPEEK/PSt-DVB-30% was reduced approximately by 70% when compared to the value of Nafion-117 at 30°C. The maximum selectivity of the semi-IPN membranes was 9.27 × 104 S s cm−3 for the SPEEK/PSt-DVB-20%, which was nearly 2.1 times higher than that of the Nafion-117 membrane. The improved properties of the SPEEK/PSt-DVB membranes were attributed to the homogeneous semi-IPN structure and to the hydrophobic molecular chains of PSt-DVB.

Performance of Sulfonated Poly(Vinyl Alcohol)/Graphene Oxide Polyelectrolytes for Direct Methanol Fuel Cells

2020 ◽  
Vol 8 (7) ◽  
pp. 2000124
Author(s):  
Oscar Gil-Castell ◽  
Óscar Santiago ◽  
Borja Pascual-Jose ◽  
Emilio Navarro ◽  
Teresa J. Leo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Fuel Cells ◽  
Vinyl Alcohol ◽  
Direct Methanol Fuel Cells ◽  
Poly Vinyl Alcohol ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Sulfonated Poly

Highly selective sulfonated Poly (arylene ether nitrile) composite membranes containing copper phthalocyanine grafted graphene oxide for direct methanol fuel cell

2021 ◽  
pp. 095400832110394
Author(s):  
Yan Ma ◽  
Kaixu Ren ◽  
Ziqiu Zeng ◽  
Mengna Feng ◽  
Yumin Huang
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Direct Methanol Fuel Cells ◽  
Copper Phthalocyanine ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Arylene Ether ◽  
Direct Methanol ◽  
Sulfonated Poly

To improve the performances of sulfonated poly (arylene ether nitrile) (SPEN)–based proton exchange membranes (PEMs) in direct methanol fuel cells (DMFCs), the copper phthalocyanine grafted graphene oxide (CP-GO) was successfully prepared via in situ polymerization and subsequently incorporated into SPEN as filler to fabricate a series of SPEN/CP-GO-X (X represents for the mass ratio of CP-GO) composite membranes. The water absorption, swelling ratio, mechanical properties, proton conductivity, and methanol permeability of the membranes were systematically studied. CP-GO possesses good dispersion and compatibility with SPEN matrix, which is propitious to the formation of strong interfacial interactions with the SPEN, so as to provide more efficient transport channels for proton transfer in the composite membranes and significantly improve the proton conductivity of the membranes. Besides, the strong π–π conjugation interactions between CP-GO and SPEN matrix can make the composite membranes more compact, blocking the methanol transfer in the membranes, and significantly reducing the methanol permeability. Consequently, the SPEN/CP-GO-1 composite membrane displayed outstanding tensile strength (58 MPa at 100% RH and 25°C), excellent proton conductivity (0.178 S cm−1 at 60°C), and superior selectivity (5.552 × 105 S·cm−3·s). This study proposed a new method and strategy for the preparation of high performance PEMs.

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO2 composite membranes with low methanol permeability for direct methanol fuel cells

2020 ◽  
pp. 095400832095804
Author(s):  
Chengyun Yuan ◽  
Yinghan Wang
Keyword(s):  
Sulfonic Acid ◽  
Direct Methanol Fuel Cells ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Aryl Ether ◽  
Direct Methanol ◽  
Aryl Ether Ketone ◽  
Ether Ketone ◽  
Sulfonic Acid Groups ◽  
Sulfonated Poly

A sulfonated poly(aryl ether ketone sulfone) (SPAEKS) with locally dense sulfonic acid groups is synthesized and different amounts of TiO2 is doped into SPAEKS matrix to prepare composite membranes (SPAEKS/TiO2-x). SEM shows that TiO2 in the composite membranes has good dispersibility when TiO2 content is not higher than 3%. The composite membranes show good mechanical properties, dimensional stability and oxidative stability. The proton conductivity of composite membranes is near to that of Nafion 117 membrane and methanol permeability of composite membranes is much lower than that of Nafion 117 membrane. Therefore, the proton selectivity of composite membranes is higher than that of Nafion 117 membrane. In particular, proton selectivity of SPAEKS/TiO2-3% (12.8 × 104 S s cm−3) is four times higher than that of Nafion 117 membrane (3.2 × 104 S s cm−3).

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