Back to results
US 9,853,298 B2Granted
Corrosion resistant barrier layer for a solid oxide fuel cell stack and method of making thereof
AssigneeBloom Energy Corporation
InventorsShailendra Parihar, Emad El Batawi, Anita Pradeep Hothur
Life of this patent
Estimating the term…
Abstract
A method of forming diffusion barrier layer includes providing an interconnect for a fuel cell stack, forming a glass barrier precursor layer over a Mn and/or Co containing electrically conductive contact layer on the interconnect, and heating the barrier precursor layer to precipitate crystals in the barrier precursor layer to convert the barrier precursor layer to a glass ceramic barrier layer.
Claims5
An interconnect for a fuel cell stack, comprising
- an interconnect body having an air surface having air flow channels and ribs and a fuel surface having fuel flow channels and ribs;
- an electrically conductive contact layer located on the air surface of the interconnect, the electrically conductive contact layer containing at least one of Co and Mn;
- and
- a first layer located over the electrically conductive contact layer, the first layer comprising:
- 45-55 wt. % silica (SiO2);
- 5-10 wt. % potassium oxide (K2O);
- 2-5 wt. % calcium oxide (CaO);
- 2-5 wt. % barium oxide (BaO);
- 0-1 wt. % boron trioxide (B2O3);
- 15-25 wt. % alumina (Al2O3);
- and
- 20-30 wt. % zirconia (ZrO2) on an oxide weight basis.
9 more elements
Dependencies are inferred from the claim text.