Method for Characterizing Catalyst Structure in a Fuel Cell, and Fuel Cell Design Suitable Therefor

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This patent describes a new method and specialized design for fuel cells that allows for more accurate in-situ measurement and characterization of the catalyst structure within the cell using transmission X-ray absorption spectroscopy (XAS). The key advance is a novel fuel cell geometry where both electrodes (anode and cathode) feature carefully designed catalyst-free regions, improving the representativeness and accuracy of XAS measurements by minimizing measurement artifacts and non-homogeneities present in standard designs.

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• Development and testing of new fuel cell catalysts and materials in research laboratories.
• Quality control and performance validation in the manufacture of fuel cells for vehicles, stationary power, and portable electronics.
• In-depth investigation of catalyst degradation mechanisms during fuel cell operation, supporting the development of longer-lasting fuel cells.
• Academic and industrial research studies requiring precise electrochemical and structural analysis of catalysts under actual working conditions.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables more accurate, realistic, and representative in-situ analysis of catalyst layers within operating fuel cells.
• Reduces measurement errors and artifacts caused by current and potential inhomogeneities in traditional designs, leading to better data quality.
• Supports improved fuel cell development by providing deeper insights into catalyst behavior and degradation under operational conditions.
• Facilitates the optimization of catalyst usage, potentially reducing material costs by enabling targeted improvements based on more reliable data.

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Patent Abstract

The invention relates to a method for characterising the catalyst structure in a fuel cell, and at the same time in particular the transmission X-ray absorption measurements (XAS), in which a novel fuel cell design is used. The fuel cell comprises a first (planar) electrode having a first catalyst, a second (planar) electrode having a second catalyst, and an electrolyte membrane having a layer thickness lm arranged between the electrodes, wherein the first electrode has at least one catalyst-free circular region of radius R1 max. Unlike hitherto customary practice, the second electrode of the fuel cell according to the invention likewise has a catalyst-free circular region of radius R2