Bipolar metallic plate for high-temperature fuel cell stack

摘要

A high temperature fuel cell (4, 5) has chromium-containing interconnector plates (6) which bear, on the cathode-facing side, a coating (28) comprising a surface layer (30) of nickel and an overlying layer (32) of aluminium. Preferably, the surface layer (30) is a 10-100 mu thick layer containing ≥ 90 wt.% Ni and the overlying layer (32) is a 10-20 mu thick layer containing ≥ 90 wt.% Al. The coating is preferably provided on the side walls (24) and bases (26) of parallel channels in the plate surface (16). Also claimed is a high temperature fuel cell stack (2) with several of the above fuel cells (4, 5).