Ballard Power Systems Corporation

Bdf IP Holdings Ltd.

Ford Motor Company Limited

Daimler Ag

Sean M MacKinnon

Shanna Denine Knights

Charles Stone

Siyu Ye

Scott McDermid

Christopher Todd Kirby

Lynn C Erickson

Timothy J Peckham

Ayesha Rashid

Kenneth A Murray

Neil R Andrews

The invention provides a fuel cell metallic separator, wherein the metallic plate's edges include a resin portion comprising the communication ports. The resin portion around the communication ports is shaped so as to be capable of interlocking with a fuel cell stack component adjacently located in a fuel cell system. The invention also provides a resin portion capable of press fitting or thermal bonding with adjacent a fuel cell stack components.

Fuel cell metallic separator

A water insoluble additive for improving the performance of an ion-exchange membrane, such as in the context of the high temperature operation of electrochemical fuel cells. The insoluble additive comprises a metal oxide cross-linked matrix having acid groups covalently attached to the matrix through linkers. In one embodiment, the metal is silicon and the cross-linked matrix is a siloxane cross-linked matrix containing silicon atoms cross-linked by multiple disiloxy bonds and having  acid groups covalently attached to the silicon atoms through alkanediyl linkers.

Water insoluble additive for improving conductivity of an ion exchange membrane

A significant problem in PEM fuel cell durability is in premature failure of the ion-exchange membrane and in particular by the degradation of the ion-exchange membrane by reactive hydrogen peroxide species. Such degradation can be reduced or eliminated by the presence of an additive in the anode, cathode or ion-exchange membrane. The additive may be a radical scavenger, a membrane cross-linker, a hydrogen peroxide decomposition catalyst and/or a hydrogen peroxide stabilizer. The presence of the additive in the membrane electrode assembly (MEA) may however result in reduced performance of the PEM fuel cell. Accordingly, it may be desirable to restrict the location of the additive to locations of increased susceptibility to membrane degradation such as the inlet and/or outlet regions of the MEA.

Reduced degradation of ion-exchange membranes in electrochemical fuel cells

A process for preparing a graft copolymers is provided comprising exposing a polymeric base material to a dose of ionizing radiation, and then contacting the irradiated base material with a microemulsion comprising at least one fluorostyrenic monomer, water and water-miscible solvent. The graft copolymer may be formed into a membrane, including ion exchange membranes.

Process for preparing graft copolymers and membranes formed therefrom

Growing community of inventors

Burnaby, Canada

Sean M MacKinnon