Gm Global Technolgoy Operations, Inc.

Michael R Schoeneweiss

Timothy J Fuller

Sean M MacKinnon

Lijun Zou

Frank D Coms

Craig S Gittleman

Joerg Roth

Thomas A Trabold

Mark F Mathias

James Mitchell

Gerald W Fly

Tao Xie

Ion C Halalay

Chunxin Ji

Bhaskar Sompalli

Junliang Zhang

Jeanette E O'Hara

Sean Mackinnon

David Wood

A membrane electrode assembly for fuel cells includes a proton conducting membrane having a first side and a second side. The proton conducting membrane in turn includes a first polymer including cyclic polyether groups and a second polymer having sulfonic acid groups. The membrane electrode assembly further includes an anode disposed over the first side of the proton conducting layer and a cathode catalyst layer disposed over the second side of the proton conducting layer.

Metal ionophores in PEM membranes

A method of making an ion conducting membrane includes a step of reacting a compound having formula 1 with a polymer having polymer segment 2:  and

Polyolefin-PFCB ionomer

An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a porphyrin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such porphyrin-containing compounds.

Co(II)tetramethoxyphenylporphyrin additive to PFSA PEMs for improved fuel cell durability

A membrane electrode assembly for a fuel cell includes an anode catalyst layer, a cathode catalyst layer, and an ion conducting membrane. The ion conducting membrane is interposed between the anode catalyst layer and the cathode catalyst layer. The ion conducting membrane includes an ion conducting polymer having sulfonic acid groups and rubber particulates. Characteristically, the rubber particulates have an average spatial dimension less than about 600 nanometers. A fuel cell incorporating the membrane electrode assembly is also provided.

Rubber crack mitigants in polyelectrolyte membranes

A fibrous sheet for fuel cell or battery applications is formed by electrospinning a fluorinated ion-conducting polymer solution to form an agglomeration of fibers.

Nano-fibers for electrical power generation

A fuel cell comprising: a first layer comprising a first ionomer and an additive, the additive comprising a metal oxide comprising an oxide at least one of of Ce, Mn, V, Pt, Ru, Zr, Ni, Cr, W, Co, Mo, or Sn, and wherein the additive is present in at least 0.1 weight percent of the ionomer is disclosed as one embodiment of the invention, and performance and durability are advantaged wherein one or all of the metal oxide consists essentially nanoparticles.

Additives for fuel cell layers

An ion conducting membrane for fuel cells involves coupling a compound having a sulfonic acid group with a polymeric backbone. Each of the compounds having a sulfonic acid group and the polymeric backbone are first functionalized with a halogen.

Organo-copper reagents for attaching perfluorosulfonic acid groups to polyolefins

An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a tin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such tin-containing compounds.

[object Object]

A membrane electrode assembly for fuel cells includes a proton conducting membrane having a first side and a second side. The membrane electrode assembly further includes an anode disposed over the first side of the proton conducting layer and a cathode catalyst layer disposed over the second side of the proton conducting layer. One or both of the anode catalyst layer and the cathode catalyst layer includes a first polymer which has cyclic polyether groups. An ink composition for forming a fuel cell catalyst layer is also provided.

Crown ether containing PEM electrode

A membrane/electrode assembly for fuel cell applications includes an ion conducting polymer and a porphyrin-containing compound at least partially dispersed within the ion conducting polymer, a first electrode and a second electrode. At least one of the first and second electrodes also includes the porphyrin-containing compound. The membrane/electrode assembly exhibits improved performance over membrane/electrode assembly not incorporating such porphyrin-containing compounds.

Cobalt(II) tetramethoxyphenylporphyrin (CoTMPP) ionomer stabilization to prevent electrode degradation

A polymer for ion conductor applications includes a polymer segment having a perfluorocyclobutyl moiety and a phosphonated aryl group and a polymer segment a perfluorocyclobutyl moiety without phosphonated aryl group. The polymer is formed into an ion conducting membrane for fuel cell applications.

Poly(perfluorocyclobutane) ionomer with phosphonic acid groups for high temperature fuel cells

Co(II)tetramethoxyphenylporphyrin additive to PFSA PEMS for improved fuel cell durability

A polymer useful as an ion conductor in fuel cells includes a perfluorocyclobutyl moiety and pendant PFSA side groups. The polymer is made by a variation of the Ullmann reaction. Ion conducting membranes incorporating the polymer are provided.

Polyelectrolyte membranes made of poly(perfluorocyclobutanes) with pendant perfluorosulfonic acid groups and blends with poly(vinylidene fluoride)

An ion exchange membrane is prepared from a block copolymer comprising a hydrophobic polymer segment and a polar polymer segment. The ion exchange membrane is formed by placing a film layer in steam, water or an electric field at a temperature greater than about 40&#xb0; C. for sufficient amount of time to develop a bicontinuous morphology. The ion exchange membrane is also formed from a film layer comprising a block copolymer and a solvent. The film layer is placed in an electric field at an elevated temperature and dried therein. The film layer is thereby converted into an ion exchange membrane with bicontinuous morphology. The ion exchange membrane prepared according to these processes exhibits improved mechanical and electrochemical properties.

Ion exchange membrane having lamellar morphology and process of making the same

A blend composition comprises a fluorine-containing polymer electrolyte and a fluoro-rubber. An electrolyte membrane may be prepared from the blend composition. The electrolyte membrane may be used in electrochemical cells such as electrolyzers, batteries and fuel cells.

Growing community of inventors

W. Henrietta, NY, United States of America

Michael R Schoeneweiss