Cathode development for alkaline fuel cells based on a porous silver membrane

Bidault, F.; Kucernak, Anthony

doi:10.1016/j.jpowsour.2011.02.008

Cited by 30 publications

(8 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Impedance measurement and a polarization curve were used to examine the to be applied for a mobile application. The power density was further improved from 15 mW.cm -2 to mW.cm -2 [123]. This improvement was due to the replacement of PTFE with Teflon AF and adding the catalyst manganese dioxide or platinum.…”

Section: Alkaline Fuel Cellmentioning

confidence: 99%

See 1 more Smart Citation

Overview of porous media/metal foam application in fuel cells and solar power systems

Tan¹,

Saw²,

Thiam³

et al. 2018

Renewable and Sustainable Energy Reviews

147

View full text Add to dashboard Cite

Fuel cells and solar energy are promising candidates for electricity generation. It is forecast that fuel cells and solar power systems will play an important role in reducing the greenhouse gas footprint and replacing fossil fuels. Therefore, the limitations of fuel cells and solar power systems, such as low efficiency, high cost, and low reliability, must be addressed appropriately to enable their full potentials. Metal foam is a new class of material that has gained immense attention due to its excellent properties suitable for a wide range of applications. Its unique characteristics distinguish it from typical solid metals. The properties of metal foam can be modified during the fabrication stage by manipulating its physical structure. The goal of this paper is to review the application of metal foam in fuel cells and solar power systems. Besides, the performance of metal foam in fuel cells and solar systems is also discussed. Metal foam has been applied to the electrodes, gas diffusion layer and flow field of fuel cells to enhance performance, especially in regard to current density and flow distribution. Furthermore, metal foam is a heat exchanger for the solar energy harvesting system to improve its efficiency. Superior performances in experimental testing allows the possibility of commercialization of metal foam products in the renewable energy field.

show abstract

Section: Alkaline Fuel Cellmentioning

confidence: 99%

“…Since the cathode is important, development of the cathode is more aggressive than the anode. Bidault et al presented a sizeable number of studies on the cathode of the AFC [120][121][122][123]. The feasibility of using nickel foam as the cathode (and its performance) was compared to silver-coated nickel foam and nickel mesh [120].…”

Section: Alkaline Fuel Cellmentioning

confidence: 99%

Overview of porous media/metal foam application in fuel cells and solar power systems

Tan¹,

Saw²,

Thiam³

et al. 2018

Renewable and Sustainable Energy Reviews

147

View full text Add to dashboard Cite

show abstract

“…The AF is a hydrophobic polymer which is a substitute to PTFE. The application of the AF in its dissolved form meant a thin and uniform film was left after evaporation of the solvent, 37 ideal for coating the 400 nm pores of the polycarbonate. This coating 100 method also eliminates the sintering step at > 300 °C, needed when applying the more typically used PTFE colloids, which would cause degradation of the PCTE membrane.…”

mentioning

confidence: 99%

Electrocatalytic performance of fuel cell reactions at low catalyst loading and high mass transport

Zalitis

Kramer

Kucernak

2013

Phys. Chem. Chem. Phys.

180

194

View full text Add to dashboard Cite

An alternative approach to the rotating disk electrode (RDE) for characterising fuel cell electrocatalysts is presented. The approach combines high mass transport with a flat, uniform, and homogeneous catalyst deposition process, well suited for studying intrinsic catalyst properties at realistic operating conditions of a polymer electrolyte fuel cell (PEFC). Uniform catalyst layers were produced with loadings as low as 0.16 μg Pt cm -2 and thicknesses as low as 200 nm. Such ultra thin catalyst layers are considered 10 advantageous to minimize internal resistances and mass transport limitations. Geometric current densities as high as 5.7 A cm -2 Geo were experimentally achieved at a loading of 10.15 μgPt cm -2 for the hydrogen oxidation reaction (HOR) at room temperature, which is three orders of magnitude higher than current densities achievable with the RDE. Modelling of the associated diffusion field suggests that such high performance is enabled by fast lateral diffusion within the electrode. The electrodes operate over a wide 15 potential range with insignificant mass transport losses, allowing the study of the ORR at high overpotentials. Electrodes produced a specific current density of 31 ± 9 mA cm -2Spec at a potential of 0.65 V vs. RHE for the oxygen reduction reaction (ORR) and 600 ± 60 mA cm -2 Spec for the peak potential of the HOR. The mass activities of Pt/C catalysts towards the ORR was found to exceed a range of literature PEFC mass activities across the entire potential range. The HOR also revealed fine structure in 20 the limiting current range and an asymptotic current decay for potentials above 0.36 V. These characteristics are not visible with techniques limited by mass transport in aqueous media such as the RDE. IntroductionUnderstanding the kinetics of the oxygen reduction reaction 25 (ORR) and hydrogen oxidation reaction (HOR) on platinum nano-particles is vital for polymer electrolyte fuel cell (PEFC) development. Each platinum nano-particle within the electrode should have optimal proton access, gas access and an electronic path to study intrinsic electrocatalytic properties of the catalyst. 30 These three criteria should be maintained throughout the working conditions (e.g., temperature, humidity and potential). If a reaction site is starved for any of the three, its activity will be reduced, which skews the average activity and introduces an error. It is paramount to minimize the number of underperforming 35 catalyst sites to determine intrinsic catalyst properties. Ideally, the catalyst layer should be made as thin as possible. Thus, all the catalyst particles will be close to the perfluorosulfonic acid (PFSA) membrane for ionic access and close to the gas diffusion layer (GDL) for gas access and an electronic path, removing 40 internal limitations. Mass transport limitations lead to concentration polarization across thick electrodes, 1-3 limiting the active thickness to about 5 μm at high current densities, regardless of how thick the catalyst layer is. 1 The majority of ORR and ...

show abstract

“…About 1 wt. % solutions of BrEA$HBr, DmIm, CMPEEK, and PEEKAeImBr were prepared by dissolving them into DMSO-d 6 . Tetramethylsilane (TMS) was used as an internal standard in all cases.…”

Section: Synthesis Of Long-spacer-chain Imidazolium Functionalized Pementioning

confidence: 99%

Long-spacer-chain imidazolium functionalized poly(ether ether ketone) as hydroxide exchange membrane for fuel cell

Yan

Gao

Zheng

et al. 2016

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Cathode development for alkaline fuel cells based on a porous silver membrane

Cited by 30 publications

References 32 publications

Overview of porous media/metal foam application in fuel cells and solar power systems

Overview of porous media/metal foam application in fuel cells and solar power systems

Electrocatalytic performance of fuel cell reactions at low catalyst loading and high mass transport

Long-spacer-chain imidazolium functionalized poly(ether ether ketone) as hydroxide exchange membrane for fuel cell

Contact Info

Product

Resources

About