Ballard Power Systems Corporation

Paul Beattie

David P Wilkinson

Siyu Ye

Michael V Lauritzen

Kyoung J Bai

Michael T Davis

John Robert Gordon

Lynn C Erickson

Haijiang Wang

Kelvin Keen-Ven Fong

Bien Hung Chiem

Sheilah Neumann

Paul Kozak

Todd E Wilke

Sonia Geillis Wong-Cheung

Shannon R Hodgson

A membrane electrode assembly may be made using a one-sided catalyst coated membrane (CCM) wherein only one catalyst layer, either the anode or the cathode, is coated directly on the ion-exchange membrane. In particular, a one-sided CCM may be used where it may not be practicable to coat both sides of the ion-exchange membrane with catalyst layers such as when PTFE is added to the anode catalyst layer to render it reversal tolerant.

Method of making a membrane electrode assembly for electrochemical fuel cells

Fluid diffusion layers with favorable mechanical and electrical properties are prepared for fuel cell electrodes by impregnating a porous carbonaceous web with a carbonizable polymer having pyrrolidone functionality and then carbonizing the pyrrolidone polymer. The polymer having pyrrolidone functionality is stabilized against vaporization by use of an oxidization step prior to carbonization. The fluid diffusion layers are particularly suitable for use as gas diffusion layers in solid polymer electrolyte fuel cells.

Fluid diffusion layers for fuel cells

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Port Moody, Canada

Paul Beattie