Sgl Carbon Ag

Sgl Carbon Se

Heiko Leinfelder

Peter Wilde

Oswin Öttinger

Jürgen Bacher

Silvia Mechen

Victor Trapp

Michael Maendle

Martin Reinthaler

Josef Steinhart

Wolfgang Notter

Alois Baumann

This invention relates to electrode substrates for electrochemical cells, particularly low-temperature fuel cells, and processes for their production. Low-cost carbon fiber paper structures are used as precursor for preparation of an all-carbon product that has a high electric conductivity and porosity and can be processed in a continuous reel-to-reel mode. These paper materials are further impregnated and processed to adjust the final product properties. This all-carbon electrode substrate is not brittle thereby avoiding the main disadvantage of the prior art.

Carbon fiber electrode substrate for electrochemical cells

A flat gasket for flange connections has a leakage rate below the limit value of 1*10kPa*1/(s*m). The gasket assembly has a thick, areal, pressure-resistant core formed from at least one layer of graphite foil with a base weight of at most 1500 g/m, or a multilayer sandwich of such graphite foils and metal interlayers. The core is embedded between two metal foils, and the surfaces that are remote from the core are covered by covering layers of graphite foil with a base weight of at most 350 g/m. A ratio of the base weight of the graphite foil of the covering layers to the base weight of the graphite foil of the core lies between 1:3 and 1:7.

Gasket for flange connections

This invention relates to electrode substrates for electrochemical cells, particularly low-temperature fuel cells, and processes for their production. Graphitized fiber web structures are used that have a preferred non-planar fiber alignment resulting in high through-plane conductivity. These structures are further impregnated and processed to adjust the final product properties.

Electrode substrate for electrochemical cells based on low-cost manufacturing processes

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Noerdlingen, Germany

Heiko Leinfelder