Expanded graphite fluid flow field plates and method for making such plates

摘要

Improved expanded graphite fluid flow field plates comprise an expanded graphite material having a desired area weight, abbreviated as A and typically expressed in units of g/cm 2 . The methods for making the plates comprise forming at least one flow channel and at least one landing associated therewith in at least one major surface of the sheet, such that the web thickness of the plate is greater than A/(1.8 g/cm 3 ).