Forschungszentrum Juelich Gmbh

Forschungszentrum Julich Gmbh

Leszek Niewolak

Hans Peter Buchkremer

Martin Bram

Willem J Quadakkers

Lorenz Singheiser

Norbert H Menzler

Willem Quadakkers

Andreas Hospach

Joanna Zurek

Philip James Ennis

Storage material, for storing electrical energy by reduction or oxidation of an active component, comprises the active component in at least a reduced and/or oxidized form and a reactive framework structure that is capable of chemically integrating at least one form of the active component in the form of a mixed oxide or an alloy into the reactive framework structure during the charging or discharging process. In the case of an oxidic framework structure, said integration can occur by formation of at least one stable mixed oxide of the active component and an oxide from the framework structure. In the case of the metallic framework structure, said integration can occur by forming an alloy of active component and at least one metal of the framework structure.

Electrochemical storage material and electrochemical storage device for storing electrical energy, comprising such a storage material

An interconnector is made of ferritic chromium steel, on which a cupriferous layer is disposed. This layer prevents interdiffusion between the chromium steel and additional components with which the interconnector has direct contact. According to the state of the art, such diffusion occurs particularly if these additional components contain nickel. In addition, the interconnector may comprise a chromium-containing oxide layer as a barrier against interdiffusion. For this purpose, the interconnector steel can also be preoxidized before applying the cupriferous layer. The interconnector has a significantly longer service life than interconnectors according to the state of the art, and it has improved electrical conductivity because the electrical contact surface thereof is free of oxides and has high transverse conductivity.

Interconnector for a fuel cell stack and method for production

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Juelich, Germany

Leszek Niewolak