Fuel cell membranes and crossover prevention

Masel, Richard I; York, Cynthia A; Waszczuk, Piotr; Wieckowski, Andrzej

Fuel cell membranes and crossover prevention

Patent · Tue Aug 04 04:00:00 EDT 2009

OSTI ID:993514

Masel, Richard I ^[1]; York, Cynthia A ^[2]; Waszczuk, Piotr ^[3]; Wieckowski, Andrzej ^[1]

Champaign, IL
Newington, CT
White Bear Lake, MN

A membrane electrode assembly for use with a direct organic fuel cell containing a formic acid fuel includes a solid polymer electrolyte having first and second surfaces, an anode on the first surface and a cathode on the second surface and electrically linked to the anode. The solid polymer electrolyte has a thickness t:.gtoreq..times..times..times..times. ##EQU00001## where C.sub.f is the formic acid fuel concentration over the anode, D.sub.f is the effective diffusivity of the fuel in the solid polymer electrolyte, K.sub.f is the equilibrium constant for partition coefficient for the fuel into the solid polymer electrolyte membrane, I is Faraday's constant n.sub.f is the number of electrons released when 1 molecule of the fuel is oxidized, and j.sub.f.sup.c is an empirically determined crossover rate of fuel above which the fuel cell does not operate.

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Research Organization:: University of Illinois (Urbana, IL)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-99ER14993

Assignee:: The Board of Trustees of the University of Illinois (Urbana, IL)

Patent Number(s):: 7,569,297

Application Number:: 11/303,505

OSTI ID:: 993514

Country of Publication:: United States

Language:: English

References (55)

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