Patent ID: 7855030
Filing Date: 2010-12-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A solid oxide fuel cell comprising: a support anode; an electrolyte layer having an active area formed onto said support anode; a cathode layer formed on said active area of electrolyte layer; a support frame attached to said electrolyte layer, wherein said support frame includes an enclosure lip surrounding said active area of electrolyte layer and defining a gap between said cathode layer and said support frame; and a silver-containing brazed alloy joining said support frame to said electrolyte layer, wherein said silver-containing brazed alloy terminates at said enclosure lip of support frame; and an inhibitor for inhibiting migration of said silver-containing braze alloy along said electrolyte layer, said inhibitor comprising singly or alternatively in combination, a) a mechanical barrier disposed onto an element of said solid oxide fuel cell around said braze alloy to mechanically inhibit said migration; b) an electrically insulating feature provided in the seal margins of said element to inhibit migration of said braze alloy driven by electrical potential; and c) addition of a metal to said braze alloy.