Low-Cost Pemfc Development at Siemens - Material Aspects

Waidhas, Manfred; Datz, A.; Gebhardt, U.; vhelmolt, R.; Hornung, R.; Luft, Gerhard

doi:10.1557/proc-575-229

Cited by 3 publications

(1 citation statement)

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“…iii) Metal bipolar plate Stamping thin metal plates to manufacture bipolar plates is not only suitable for mass production but they also perform better than graphite bipolar plates in terms of heat conductivity and mechanical performance. Many companies (Siemens [19]) and institutes (DICP) are developing the technology, although there are still two issues to be resolved. The first is how to enhance the corrosion tolerance of the bipolar plate during PEMFC operation.…”

Section: Ii) Expanded Graphite Bipolar Platementioning

confidence: 99%

The Status and Prospects of Key Materials for the Proton Exchange Membrane Fuel Cell at the Dalian Institute of Chemical Physics

2004

Fuel Cells

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It is known that the key materials in a PEMFC are the electrocatalyst, electrode, proton exchange membrane and bipolar plate. ElectrocatalystThe requirements of the electrocatalyst are high catalytic activity and high utilization. Currently, the best electrocatalyst is platinum [1] and there are various chemical and physical methods available for Pt/C and Pt electrocatalyst preparation.In the sol-gel process [2] the platinum particles are generally between 1.5 and 2.5 nm. Pt particles prepared by the reduction of H 2 PtCl 6 are 3.0±4.0 nm [3]. DICP has developed a process for platinum preparation. It is shown in the TEM images of Figures 1 and 2, 20% and 40% Pt/C, respectively, that the particle size of 20% Pt/C is 3.0 nm, and that of the 40% Pt/C is 3.7 nm, with XC-72C as the carbon support.1 nm platinum particles can be prepared by the ion exchange method but the platinum loading on carbon is limited to a few percent [4]. The Pt/C prepared by the sol-gel technique and/or reduction method will have a 10±50 wt% Pt loading.

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Section: Ii) Expanded Graphite Bipolar Platementioning

confidence: 99%

The Status and Prospects of Key Materials for the Proton Exchange Membrane Fuel Cell at the Dalian Institute of Chemical Physics

2004

Fuel Cells

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Perfluorinated membranes

Doyle

Rajendran

2010

Handbook of Fuel Cells

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Perfluorinated ionomer membranes have been the topic of a tremendous amount of research for over three decades due to their use as the predominant membrane system for proton exchange membrane fuel cell (PEMFC) applications. Their excellent physical properties, including high proton conductivity, oxidative and reductive stability, and mechanical properties, have enabled the PEMFC to reach the levels of performance achieved to date. However, the demands on the fuel cell system are increasing as new applications loom with their needs for lower cost, higher performance, and flexibility to accommodate new fuels. System demands are pushing operating temperatures higher, causing the water balance and humidification of the perfluorinated ionomer membrane to become important issues. This section reviews the status of research and development activities around the Nafion ® perfluorinated ionomer membrane and Nafion ® solutions. The focus of the review is on the measurement of physical property data and new insights into the mechanisms of conduction in these systems. An attempt is made to summarize recent structural studies and characterization techniques that are bringing new insights into the conduction process, as well as recent efforts in mathematical modeling and computer simulations of the conduction process. Finally, membrane‐related issues that arise in the direct methanol PEMFC are reviewed and data on methanol transport in Nafion ® membranes are summarized.

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Electrochemical corrosion characteristics of type 316 stainless steel in simulated anode environment for PEMFC

Zeng

Luo

et al. 2003

Electrochimica Acta

147

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Low-Cost Pemfc Development at Siemens - Material Aspects

Abstract: A state of the art review is given on conceivable concepts of cost reduction for PEM fuel cell systems with specific respect to mobile applications. Achieved results at Siemens are described and will be taken as a basis to assess how close this technology is to the market.

Cited by 3 publications

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The Status and Prospects of Key Materials for the Proton Exchange Membrane Fuel Cell at the Dalian Institute of Chemical Physics

The Status and Prospects of Key Materials for the Proton Exchange Membrane Fuel Cell at the Dalian Institute of Chemical Physics

Perfluorinated membranes

Electrochemical corrosion characteristics of type 316 stainless steel in simulated anode environment for PEMFC

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