Anode assembly for an electrochemical cell

H - Electricity – 01 – M

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H01M 8/12 (2006.01) H01M 4/86 (2006.01)

Patent

CA 2426750

Anode assembly consisting of an anode cermet (2) and an auxiliary layer (3) positioned between the anode cermet and the electrolyte (1). According to the invention this anode cermet comprises a mixture of metals and metal oxides and oxygen ion-conducting oxide. In order to improve the adhesion of this layer to the electrolyte under mechanical stress, which arises in particular in the case of a change in temperature and gas disruptions as a consequence of system malfunctions, it is proposed to produce the auxiliary layer from a material that essentially comprises oxygen ion-conducting oxide. In order to improve the contact with the current collector it is proposed to apply a contact layer (4) essentially consisting of metal (oxide) particles between the anode cermet (2) and the current collector (5).

L'invention concerne un ensemble anode consistant en un cermet d'anode (2) et une couche (3) auxiliaire placée entre le cermet d'anode et l'électrolyte (1). Selon cette invention, ce cermet d'anode comprend un mélange de métaux, d'oxydes métalliques et d'oxyde conducteur d'ions d'oxygène. De manière à améliorer l'adhésion de cette couche à l'électrolyte sous la contrainte mécanique, laquelle se produit plus spécifiquement dans le cas d'un changement de température et de pannes de gaz en tant que conséquence de dysfonctionnements du système, il est proposé de produire la couche auxiliaire à partir d'un matériau qui comprend essentiellement de l'oxyde conducteur d'ions d'oxygène. De manière à améliorer le contact avec le collecteur de courant, il est proposé d'appliquer une couche (4) de contact constituée essentiellement de particules métalliques (oxyde) entre le cermet (2) d'anode et le collecteur (5) de courant.

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