Effect of Graphene Oxide on the Characteristics of sPEEK-Chitosan Membranes for Direct Methanol Fuel Cells

Direct Methanol Fuel Cell (DMFC) can operate at low temperatures, but efficiency and performance are greatly influenced by the material. On the other hand, sulfonated ketone polyether ethers (sPEEK) which have high thermal resistance, ductile, chemical resistance and high mechanical properties, can be combined with chitosan which has good proton conductivity properties. The sPEEK-Chitosan membrane is known to have good mechanical and thermal resistance, but its conductivity is low. The addition of graphene oxide as a filler material can increase the proton conductivity due to its properties. This research was conducted with a completely randomized design of 1 factor to investigate the characteristics of the sPEEK-Chitosan composite membrane as the dependent variable and the addition of graphene oxide solution to the variables 0, 1, 3, 6, and 9% w/w as independent variables. The test results show that the water uptake is in the range of 8.82-33.34%, the swelling degree is in the range of 5.55-20.75%, and the ion exchange capacity is 0.1875-0.2714 meq/g. With this good character, the sPEEK-chitosan membrane with the addition of graphene oxide is a promising candidate for DMFC applications.

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

High Performance Polymers ◽

10.1177/09540083211039412 ◽

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.

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A study on the characterization of FEP-g-PVBSA membranes as polymer electrolytes for direct methanol fuel cells

High Performance Polymers ◽

10.1177/0954008311423583 ◽

2011 ◽

Vol 23 (7) ◽

pp. 555-560 ◽

Cited By ~ 7

Author(s):

Geng Fei ◽

Mi-Lim Hwang ◽

Junhwa Shin

Keyword(s):

Proton Conductivity ◽

Sulfonic Acid ◽

Direct Methanol Fuel Cells ◽

Exchange Capacity ◽

Methanol Permeability ◽

Cross Sectional ◽

Electrolyte Membrane ◽

Direct Methanol ◽

Radiation Induced

Poly(vinylbenzyl sulfonic acid)-grafted poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP- g-PVBSA) electrolyte membrane was prepared by radiation-induced grafting of vinylbenzyl chloride onto FEP film with subsequent sulfonation processes. An energy dispersive X-ray analysis was used to observe the cross-sectional distribution behaviors of the hydrophilic sulfonic acid groups and hydrophobic fluorine groups. The characteristics of an ion-exchange capacity (IEC), water and methanol uptake, methanol permeability, and proton conductivity as a function of the degree of grafting were studied. The IECs and water uptakes of membranes with different degrees of grafting (36 to 102%) were measured in the range of 0.8 to 1.62 meq g−1 and 10 to 30%, respectively. The proton conductivity was higher than that of a Nafion 212 membrane (6.1 E−02 S cm−1), when the degree of grafting reached 60%. The methanol permeability and uptake of the FEP- g-PVBSA membrane was significantly lower than that of the Nafion 212 membrane, and even the degree of grafting reached 102%.

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

Energy Technology ◽

10.1002/ente.202000124 ◽

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

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Analyses of scanning electrochemical microscopy and electrochemical impedance spectroscopy in direct methanol fuel cells: permeability resistance and proton conductivity of polyaniline modified membrane

Journal of Solid State Electrochemistry ◽

10.1007/s10008-020-04659-2 ◽

2020 ◽

Vol 24 (7) ◽

pp. 1551-1565

Author(s):

S. Ben Jadi ◽

A. El Guerraf ◽

A. Kiss ◽

A. El Azrak ◽

E.A. Bazzaoui ◽

...

Keyword(s):

Fuel Cells ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Proton Conductivity ◽

Direct Methanol Fuel Cells ◽

Electrochemical Impedance ◽

Direct Methanol ◽

Methanol Fuel Cells ◽

Modified Membrane ◽

Electrochemical Microscopy

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Reinforced Poly(ether ether ketone)/Nafion Composite Membrane with Highly Improved Proton Conductivity for High Concentration Direct Methanol Fuel Cells

ACS Applied Energy Materials ◽

10.1021/acsaem.0c01212 ◽

2020 ◽

Vol 3 (7) ◽

pp. 7180-7190

Author(s):

Chongyang Zhang ◽

Xigui Yue ◽

Jiashuang Luan ◽

Nan Lu ◽

Yongfeng Mu ◽

...

Keyword(s):

Fuel Cells ◽

Proton Conductivity ◽

Composite Membrane ◽

Direct Methanol Fuel Cells ◽

High Concentration ◽

Ether Ether Ketone ◽

Poly Ether Ether Ketone ◽

Direct Methanol ◽

Ether Ketone ◽

Methanol Fuel Cells

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Development of a Silicon-Based Passive Gas-Liquid Separation System for Microscale Direct Methanol Fuel Cells

ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels, Parts A and B ◽

10.1115/icnmm2006-96084 ◽

2006 ◽

Author(s):

C. C. Hsieh ◽

Yousef Alyousef ◽

S. C. Yao

Keyword(s):

Direct Methanol Fuel Cells ◽

Glass Plate ◽

Maximum Pressure ◽

Separation System ◽

Liquid Separation ◽

Flow Rates ◽

Separation Chamber ◽

Direct Methanol ◽

And Performance ◽

Silicon Based

The design, fabrication, and performance characterization of a passive gas-liquid separation system is presented in this paper. The gas-liquid separation system is silicon-based and its fabrication is compatible with the existing CMU design of the microscale direct methanol fuel cell (DMFC). Both gas and liquid separators consist of staggered arrays of etched-through holes fabricated by deep reactive ion etching (DRIE). The gas separator is coated with a thin layer of hydrophobic polymer to substantiate the gas-liquid separation. To visually characterize the system performance, the gas-liquid separation system is made on a single wafer with a glass plate bonded on the top to form a separation chamber with a narrow gap in between. Benzocyclobutene (BCB) is applied for the low-temperature bonding. The maximum pressure for the liquid leakage of the gas separators is experimentally determined and compared with the values predicted theoretically. Several successful gas-liquid separations are observed at liquid pressures between 14.2 and 22.7 cmH2O, liquid flow rates between 0.705 and 1.786 cc/min, and CO2 flow rates between 0.15160 to 0.20435 cc/min.

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Increases in the proton conductivity and selectivity of proton exchange membranes for direct methanol fuel cells by formation of nanocomposites having proton conducting channels

Journal of Power Sources ◽

10.1016/j.jpowsour.2009.05.003 ◽

2009 ◽

Vol 194 (1) ◽

pp. 206-213 ◽

Cited By ~ 43

Author(s):

Yu-Huei Su ◽

Ying-Ling Liu ◽

Da-Ming Wang ◽

Juin-Yih Lai ◽

Michael D. Guiver ◽

...

Keyword(s):

Fuel Cells ◽

Proton Conductivity ◽

Direct Methanol Fuel Cells ◽

Proton Exchange Membranes ◽

Proton Exchange ◽

Proton Conducting ◽

Direct Methanol ◽

Methanol Fuel Cells

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Catalytic performance of a pyrolyzed graphene supported Fe–N–C composite and its application for acid direct methanol fuel cells

RSC Advances ◽

10.1039/c6ra20593c ◽

2016 ◽

Vol 6 (93) ◽

pp. 90797-90805 ◽

Cited By ~ 5

Author(s):

Jingjing Xi ◽

Fang Wang ◽

Riguo Mei ◽

Zhijie Gong ◽

Xianping Fan ◽

...

Keyword(s):

Graphene Oxide ◽

Direct Methanol Fuel Cell ◽

Carbon Nitride ◽

Direct Methanol Fuel Cells ◽

Catalytic Performance ◽

Reduction Reaction ◽

Composite Catalyst ◽

Direct Methanol ◽

Methanol Fuel Cells ◽

Methanol Fuel Cell

A graphene supported Fe–N–C composite catalyst, synthesized by pyrolysis of graphene oxide, graphitic carbon nitride, ferric chloride and carbon black, was evaluated for the acid oxygen reduction reaction and the direct methanol fuel cell.

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