3M Innovative Properties Company

Matthew J Lindell

Michael Andrew Yandrasits

Klaus Hintzer

Miguel Antonio Guerra

Gregg D Dahlke

Denis Duchesne

Andrew J L Steinbach

Sean M Smith

Carl A Laskowski

Lisa P Chen

Arne Thaler

Andrew T Haug

Fuxia Sun

John E Abulu

Tyler S Matthews

A fluoropolymer is described comprising pendent groups having the formula: —(CF)—(OCF)—(OCF)—SO—[NX—SO(CF)—SO]—NX—SO—Rf wherein Rf is a perfluoroether and Xand Xare independently cationic counterions. Also described are various articles including catalyst ink, polymer electrolyte membranes, and membrane electrode assemblies comprising the fluoropolymer described herein; as well as a method of making a fluoropolymer.

Fluoropolymer comprising pendent groups with ionic bis(sulfonyl)imide moiety and perfluoroether terminal group

Presently described is a monomer having the formula: wherein Also described is a method of making such monomer, various compounds prepared during while making the monomer, fluoropolymers comprising polymerized units of such monomer, fuel cell membranes, membrane electrode assemblies, and methods of making fluoropolymers.

Perfluorosulfonyl monomers suitable for fluoropolymers and fuel cell membrane articles

Described herein is a coating composition comprising: (a) a metal catalyst, wherein the metal catalyst comprises at least one of platinum, ruthenium, iridium, and alloys and combinations thereof; (b) an at least highly fluorinated ionomer comprising a polymer backbone and a plurality of first side chains pendant therefrom, wherein the first side chain comprises at least one protogenic group, wherein the protogenic group is selected from a sulfonic acid, a bis(sulfonyl)imide, a sulfonamide, a sulfonyl methide, and salts and combinations thereof, and wherein the polymer backbone comprises an average of at least 14 carbon atoms between adjacent first side chains along the polymer backbone; and (c) a solvent. Such coating compositions may be used to make electrodes for electrochemical cells and have been shown to have reduced poisoning of the catalyst.

Fluoropolymer ionomers with reduced catalyst poisoning and articles therefrom

The copolymer includes divalent units represented by formula —[CF—CF]—, at least one divalent unit represented by formula (I): and at least one divalent unit independently represented by formula (II): A is —N(RF)or a is non-aromatic, 5- to 8-membered, perfluorinated ring comprising one or two nitrogen atoms in the ring and optionally comprising at least one oxygen atom in the ring, each RFa is independently linear or branched perfluoroalkyl having 1 to 8 carbon atoms and optionally interrupted by at least one catenated O or N atom, each Y is independently —H or —F, with the proviso that one Y may be —CF, h is 0, 1, or 2, each i is independently 2 to 8, and j is 0, 1, or 2. A catalyst ink and polymer electrolyte membrane including the copolymer are also provided.

Fluorinated copolymer and compositions and articles including the same

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Woodbury, MN, United States of America

Matthew J Lindell