Performance of the direct methanol fuel cell with radiation-grafted polymer membranes

Scott, Keith; Taama, W.M.; Argyropoulos, P.

doi:10.1016/s0376-7388(99)00382-8

Cited by 153 publications

(64 citation statements)

References 22 publications

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“…A very comprehensive review on the preparation of ion-exchange membranes using radiation-grafting of polar monomers onto non-polar films has been recently published by Nasef et al [67]. Radiation-grafted PEMs have been tested in DMFCs by Scott et al [68].…”

Section: Review Of Other Relevant Aaem Systemsmentioning

confidence: 99%

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Varcoe¹,

2005

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This article introduces the radical approach of applying alkaline anion-exchange membranes (AAEMs) to meet the current challenges with regards to direct methanol fuel cells (DMFCs).A review of the literature is presented with regards to the testing of fuel cells with alkaline membranes (fuelled with hydrogen or methanol) and also to candidate alkaline anionexchange membranes for such an application. A brief review of the directly related patent literature is also included. Current and future research challenges are identified along with potential strategies to overcome them. Finally, the advantages and challenges with the direct electrochemical oxidation of alternative fuels are discussed, along with how the application of alkaline membranes in such fuel cells may assist in improving performance and fuel efficiency. KeywordsLow temperature, Alkaline anion-exchange membrane, Direct methanol fuel cell, Polymer electrolyte fuel cell.

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Section: Review Of Other Relevant Aaem Systemsmentioning

confidence: 99%

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Varcoe¹,

2005

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“…The logarithmic plot of the diffusion coefficients against the inverse of the temperature resulted in an almost straight line and the apparent activation energy of the diffusion process was calculated from the obtained slopes as tabulated in Table 2 5,8,12). Thus above result would indicating that the interaction between the hydrogen and the organic spices is weaker, and the proton in trialkylphosphine-based ILs is helpful for the diffusion transfer of the hydrogen.…”

Section: Diffusion Coefficients Of Hydrogen In Phosphonium-based Ilsmentioning

confidence: 91%

Electrochemical Behaviour of Hydrogen in Low-Viscosity Phosphonium Ionic Liquids

Matsumiya

Tsunashima²,

Kodama³

2011

Zeitschrift Für Naturforschung A

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The electrochemical and diffusive properties of hydrogen in low-viscosity phosphonium ionic liquids were investigated by the electrochemical methods such as cyclic voltammetry and chronoamperometry. The hydrogen redox reactions were concluded to be a quasi-reversible system in phosphonium-based ionic liquids. The diffusion coefficients of hydrogen in these ionic liquids were of the order of 10 −10 m 2 s −1 at 25 • C. Additionally, the obtained activation energy of the diffusion process for hydrogen was 11.2 -15.9 kJ mol −1 estimated from the temperature dependence of the diffusion coefficients.A new type of proton conducting medium such as triethylphosphonium bis(trifluoromethylsulfonyl)amide was synthesized by the neutralization reaction, because the trialkylphosphine-based ionic liquids with good stability at higher temperature and high conductivity were appropriate candidates. This proton conducting membrane containing the ionic liquids with trialkylphosphine-based cations and the polyvinylidenefluoride-co-hexafluoropropylene has been fabricated in the present study. The proton conducting membrane exhibits relatively high ionic conductivity along with good mechanical stability.

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“…Investigations by Kreuer [44] and Ma [45] show that the conductivity of these materials depends strongly on both their degree of sulfonation and their degree of hydration, and, in that regard, they are not significantly better than Nafion TM . A summary of these materials is presented by Scott [46].…”

Section: High Temperature Polymer Electrolyte Membranesmentioning

confidence: 99%

Catalyst, Membrane, Free Electrolyte Challenges, and Pathways to Resolutions in High Temperature Polymer Electrolyte Membrane Fuel Cells

2017

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High temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are being studied due to a number of benefits offered versus their low temperature counterparts, including co-generation of heat and power, high tolerance to fuel impurities, and simpler system design. Approximately 90% of the literature on HT-PEM is related to the electrolyte and, for the most part, these electrolytes all use free phosphoric acid, or similar free acid, as the ion conductor. A major issue with using phosphoric acid based electrolytes is the free acid in the electrodes. The presence of the acid on the catalyst sites leads to poor oxygen activity, low solubility/diffusion, and can block electrochemical sites through phosphate adsorption. This review will focus on these issues and the steps that have been taken to alleviate these obstacles. The intention is this review may then serve as a tool for finding a solution path in the community.

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Performance of the direct methanol fuel cell with radiation-grafted polymer membranes

Cited by 153 publications

References 22 publications

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Electrochemical Behaviour of Hydrogen in Low-Viscosity Phosphonium Ionic Liquids

Catalyst, Membrane, Free Electrolyte Challenges, and Pathways to Resolutions in High Temperature Polymer Electrolyte Membrane Fuel Cells

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