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Title: Dry compliant seal for phosphoric acid fuel cell

Abstract

This patent describes a dry compliant overlapping seal for a phosphoric acid fuel cell preformed of non-compliant Teflon to make an anode seal frame that encircles an anode assembly, a cathode seal frame that encircles a cathode assembly and a compliant seal frame made of expanded Teflon, generally encircling a matrix assembly. Each frame has a thickness selected to accommodate various tolerances of the fuel cell elements and are either bonded to one of the other frames or to a bipolar or end plate. One of the non-compliant frames is wider than the other frames forming an overlap of the matrix over the wider seal frame, which cooperates with electrolyte permeating the, matrix to form a wet seal within the fuel cell that prevents process gases from intermixing at the periphery of the fuel cell and a dry seal surrounding the cell to keep electrolyte from the periphery thereof. The frames may be made in one piece, in L-shaped portions or in strips and have an outer perimeter which registers with the outer perimeter of bipolar or end plates to form surfaces upon which flanges of pan shaped, gas manifolds can be sealed.

Inventors:
;
Publication Date:
OSTI Identifier:
5475822
Patent Number(s):
US 4978590; A
Application Number:
PPN: US 7-405716
Assignee:
Dept. of Energy, Washington, DC (USA)
Resource Type:
Patent
Resource Relation:
Patent File Date: 11 Sep 1989
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; ACID ELECTROLYTE FUEL CELLS; SEALS; ANODES; PHOSPHORIC ACID; TEFLON; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; ELECTRODES; FLUORINATED ALIPHATIC HYDROCARBONS; FUEL CELLS; HALOGENATED ALIPHATIC HYDROCARBONS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MATERIALS; ORGANIC COMPOUNDS; ORGANIC FLUORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLY; POLYETHYLENES; POLYTETRAFLUOROETHYLENE; SYNTHETIC MATERIALS; 300503* - Fuel Cells- Materials, Components, & Auxiliaries

Citation Formats

Granata, Jr, S J, and Woodle, B M. Dry compliant seal for phosphoric acid fuel cell. United States: N. p., 1990. Web.
Granata, Jr, S J, & Woodle, B M. Dry compliant seal for phosphoric acid fuel cell. United States.
Granata, Jr, S J, and Woodle, B M. 1990. "Dry compliant seal for phosphoric acid fuel cell". United States.
@article{osti_5475822,
title = {Dry compliant seal for phosphoric acid fuel cell},
author = {Granata, Jr, S J and Woodle, B M},
abstractNote = {This patent describes a dry compliant overlapping seal for a phosphoric acid fuel cell preformed of non-compliant Teflon to make an anode seal frame that encircles an anode assembly, a cathode seal frame that encircles a cathode assembly and a compliant seal frame made of expanded Teflon, generally encircling a matrix assembly. Each frame has a thickness selected to accommodate various tolerances of the fuel cell elements and are either bonded to one of the other frames or to a bipolar or end plate. One of the non-compliant frames is wider than the other frames forming an overlap of the matrix over the wider seal frame, which cooperates with electrolyte permeating the, matrix to form a wet seal within the fuel cell that prevents process gases from intermixing at the periphery of the fuel cell and a dry seal surrounding the cell to keep electrolyte from the periphery thereof. The frames may be made in one piece, in L-shaped portions or in strips and have an outer perimeter which registers with the outer perimeter of bipolar or end plates to form surfaces upon which flanges of pan shaped, gas manifolds can be sealed.},
doi = {},
url = {https://www.osti.gov/biblio/5475822}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {12}
}