Electrolyte matrix in a molten carbonate fuel cell stack

Details Electrolyte matrix in a molten carbonate fuel cell stack Electrolyte matrix in a molten carbonate fuel cell stack

1986-05-27

1987-04-21

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 44, 429 46, H01M 814

Patent

active

046596356

ABSTRACT:
A fuel cell stack is disclosed with modified electrolyte matrices for limiting the electrolytic pumping and electrolyte migration along the stack external surfaces. Each of the matrices includes marginal portions at the stack face of substantially greater pore size than that of the central body of the matrix. Consequently, these marginal portions have insufficient electrolyte fill to support pumping or wicking of electrolyte from the center of the stack of the face surfaces in contact with the vertical seals. Various configurations of the marginal portions include a complete perimeter, opposite edge portions corresponding to the air plenums and tab size portions corresponding to the manifold seal locations. These margins will substantially limit the migration of electrolyte to and along the porous manifold seals during operation of the electrochemical cell stack.

REFERENCES:
patent: 3481788 (1969-12-01), Hamlen et al.
patent: 3867206 (1975-02-01), Tracciola et al.
patent: 4526845 (1985-07-01), Reiser et al.
patent: 4548877 (1985-10-01), Jacovangelo et al.
patent: 4579788 (1986-04-01), Marianowski et al.
patent: 4596751 (1986-06-01), Kunz

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