Patent ID: 7785725
Filing Date: 2010-08-31
Classification: H01M,Y02E

Abstract:
1. A fuel cell assembly comprising: a plurality of components including two adjacent fuel cell components defining a space there between for the passage of gas in the fuel cell assembly; and a gasketing element positioned at a joint and bonded in place between said adjacent fuel cell components for sealing said joint, said gasketing element including a composition comprising forsterite, wherein the resultant seal is impermeable to said gas, wherein said gasketing element is pre-formed as a gasket, wherein said gasketing element further comprises an inhibitor addition effective to inhibit forsterite grains from aggregating into larger forsterite grains, wherein said pre-formed gasket is formed from a powder having a trimodal size distribution comprising nanoscale particles, sub-micron scale particles and micron scale particles, wherein said nanoscale particles have an average particle size (ds0) of about 10 nm to about 150 nm, wherein said sub-micron scale particles have an average particle size (ds0) of about 0.2 microns to about 0.5 microns, and wherein said micron scale particles have an average particle size (ds0) of about 2.0 microns to about 5.0 microns, wherein the nanoscale particles comprise the inhibitor addition and the sub-micron scale particles and micron scale particles comprise forsterite.