Forschungszentrum Julich Gmbh

Martin Müller

Hendrik Dohle

Detlef Stolten

Jürgen Mergel

Dirk Federmann

Jan Bringmann

Walter Zwaygardt

Holger Janssen

Wilfried Behr

Sebastian Holtwerth

Andreas Maintz

Markus STÄHLER

Jörg Wilhelm

Thorsten Wüster

In low-temperature fuel cells according to prior art, the problem often arises that the diffusion layer of the cathode is filled by water which is permeated or produced on the cathode, such that oxygen can no longer be transported to the catalyst layer of the cathode in a frictionless manner. As a result, said fuel cells are regularly used with a high excess of oxygen in order to reduce the cited transport problems for the oxygen. The inventive fuel cell enables said problem to be solved in that the arrangement of the diffusion layer and the catalyst layer of the cathode is inverted. The diffusion layer, which is embodied in such a way as to also conduct ions, is directly adjacent to the electrolyte membrane. The catalyst layer oriented towards the free cathode space can advantageously directly react with the supplied oxygen without further transport problems. A further advantage lies in the fact that the water produced on the catalyst layer of the cathode and/or permeated by the electrolyte membrane and the diffusion layer can be easily withdrawn via the free cathode space.

Cathode for a direct methanol fuel cell and method for operating the same

Growing community of inventors

Bonn, Germany

Martin Müller