Patent ID: 8652691
Filing Date: 2014-02-18
Classification: H01M,Y02E,Y02P

Abstract:
1. A method of making a metal interconnect for an electrolytic cell stack, comprising; making the metal interconnect by a powder metallurgy technique which comprises pressing a powder and then sintering the powder; and oxidizing the metal interconnect made by the powder metallurgy technique at a temperature of at least 900° C. for at least 5 hours prior to providing the oxidized metal interconnect into the electrolytic cell stack, wherein the step of oxidizing is conducted at an elevated temperature in an oxidizing ambient and wherein the step of oxidizing is conducted for a sufficient time such that the interconnect does not substantially further oxidize after it is provided into the stack and exposed to an oxidizing ambient during stack operation, and wherein a length and a width of the interconnect increase by at least 0.02% during the step of oxidizing.