Method of making gas diffusion layers for electrochemical cells

Patent · 01 January 2002

OSTI ID:874802

Frisk, Joseph William ^[1]; Boand, Wayne Meredith ^[2]; Larson, James Michael ^[3]

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1. Oakdale, MN
2. Lino Lakes, MN
3. Saint Paul, MN

A method is provided for making a gas diffusion layer for an electrochemical cell comprising the steps of: a) combining carbon particles and one or more surfactants in a typically aqueous vehicle to make a preliminary composition, typically by high shear mixing; b) adding one or more highly fluorinated polymers to said preliminary composition by low shear mixing to make a coating composition; and c) applying the coating composition to an electrically conductive porous substrate, typically by a low shear coating method.

• Research Organization: 3M CO
• DOE Contract Number: FC02-99EE50582
• Assignee: 3M Innovative Properties Company (Saint Paul, MN)
• Patent Number(s): US 6465041
• OSTI ID: 874802
• Country of Publication: United States
• Language: English

Related Subjects

/427/
adding
applying
aqueous
carbon
cell
cells
coating
combining
composition
comprising
conductive
diffusion
diffusion layer
electrically
electrically conductive
electrochemical
electrochemical cell
fluorinated
gas
gas diffusion
highly
layer
layers
method
mixing
particles
polymers
porous
preliminary
provided
shear
steps
substrate
surfactants
typically
vehicle