3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Other

Trustees of the Colorado School of Mines

Steven Joseph Hamrock

Michael Andrew Yandrasits

Matthew H Frey

Naiyong Jing

Daniel M Pierpont

Gregory M Haugen

Phat Tan Pham

Klaus Hintzer

Kai Helmut Lochhaas

Shane Shanhong Mao

Harold Todd Freemyer

William M Lamanna

Arne Thaler

Mark Steven Schaberg

Donald George Peterson

Neeraj Sharma

James Michael Larson

Lori P Engle

Gene H Shipman

Eric J Iverson

L Charles Hardy

Mark Albert Schonewill

Robert M Floyd

Stephan J Obradovich

John E Abulu

Samantha D Smith

David G S Walton

Mark J Pellerite

Miguel Antonio Guerra

Tilman C Zipplies

George G Moore

Gregg D Dahlke

Dong-Wei Zhu

Denis Duchesne

Werner M Grootaert

Krzysztof A Lewinski

Bradford B Wright

Lisa P Chen

David Adrian Ylitalo

Markus E Hirschberg

Andrew T Haug

Marina M Kaplun

Linda Mae Rivard

Fidelis C Onwumere

Sean M Luopa

Tyler S Matthews

Thomas Edward Wood

Tatsuo Fukushi

Steven J Martin

Larry J Krause

Radoslav Atanasoski

Shou-Lu G Wang

Andrew Michael Herring

James E Garbe

Ji-Hwa Lee

Jennifer E Waddell

Alan David Fanta

Franz Maerz

James L Horan

Niccolo V Aieta

George Gower Innes Moore

Tanja Zeif

John Leonard Lewin

Youngdon Yi

Dinh Ba Le

Shane S Mao

Phat T Pham

H Todd Freemyer

Kai H Lochhaas

Pinar E Serim

Shawn W Lee

John L Lewin

The copolymer includes divalent units represented by formula &#x2014;[CF&#x2014;CF]&#x2014;, divalent units represented by formula; and one or more divalent units independently represented by formula: The copolymer has an &#x2014;SOX equivalent weight in a range from 300 to 2000. A polymer electrolyte membrane that includes the copolymer and a membrane electrode assembly that includes such a polymer electrolyte membrane are also provided.

Fluorinated copolymer having sulfonyl pendant groups and compositions and articles including the same

The copolymer includes divalent units represented by formula &#x2014;[CF&#x2014;CF]&#x2014;, divalent units represented by formula: (I), and one or more divalent units independently represented by formula: (II) When Z is hydrogen, the copolymer has an alpha transition temperature of up to 100 ?C. The copolymer has an &#x2014;SOZ equivalent weight in a range from 300 to 1400, and a variation of the copolymer in which &#x2014;SOZ is replaced with &#x2014;SOF has a melt flow index of up to 80 grams per ten minutes measured at a temperature of 265&#xb0; C. and at a support weight of 5 kg. A catalyst ink or polymer electrolyte membrane including the copolymer are also provided. 

Fluorinated copolymer and compositions and articles including the same

Described herein is a process for the reduction of carbon dioxide comprising:

Ionic polymer membrane for a carbon dioxide electrolyzer

Described herein is a process for the reduction of carbon dioxide comprising: providing an electrochemical device comprising an anode, a cathode, and a polymeric anion exchange membrane therebetween, wherein the polymeric anion exchange membrane comprises an anion exchange polymer, wherein the anion exchange polymer comprises at least one positively charged group selected from a guanidinium, a guanidinium derivative, an N-alkyl conjugated heterocyclic cation, or combinations thereof; introducing a composition comprising carbon dioxide to the cathode; and applying electrical energy to the electrochemical device to effect electrochemical reduction of the carbon dioxide.

An automated roll to roll method of making a fuel cell roll good subassembly is described wherein an elongated first subgasket web having a plurality of apertures is moved relative to a plurality of individual electrolyte membranes, each individual electrolyte membrane having a center region. The individual electrolyte membranes are aligned with the first subgasket web so that a center region of each electrolyte membrane is aligned with an aperture of the first subgasket web and the individual electrolyte membranes are attached to the first subgasket web.

Fuel cell subassemblies incorporating subgasketed thrifted membranes

An electrolyte membrane having a proton conducting polymer reinforced with a nanofiber mat made from a nanofiber comprising a fiber material selected from polymers and polymer blends; wherein the fiber material has a fiber material proton conductivity; wherein the proton conducting polymer has a proton conducting polymer conductivity; and wherein the fiber material proton conductivity is less than the proton conducting polymer conductivity, and methods of making. In some embodiments, the nanofiber further comprises a proton conducting polymer.

Reinforced electrolyte membrane

A fuel cell membrane electrode assembly is provided comprising a polymer electrolyte membrane comprising a first polymer electrolyte and at least one manganese compound; and one or more electrode layers comprising a catalyst and at least one cerium compound. The membrane electrode assembly demonstrates an unexpected combination of durability and performance.

Durable fuel cell membrane electrode assembly with combined additives

Described herein is a composition comprising: a polymer derived from (a) a fluorinated olefin monomer; (b) a highly fluorinated sulfur-containing monomer of the formula: CXX&#x2550;CX[(CXX)&#x2014;O&#x2014;R&#x2014;SOY] where X, X, X, X, and Xare independently selected from H, Cl, or F; w is 0 or 1; Ris a non-fluorinated or fluorinated alkylene group; and Y is selected from F, Cl, Br, I, or OM, where M is a cation; and (c) a polyfunctional monomer comprising at least two functional groups, wherein the functional groups are selected from the group consisting of: (i) a fluorovinyl ether group, (ii) a fluoroallyl ether group, (iii) a fluorinated olefinic group, and (iv) combinations thereof; articles thereof; and a method of making such polymers.

Low equivalent weight polymers

A fuel cell electrode layer may include a catalyst, an electronic conductor, and an ionic conductor. Within the electrode layer are a plurality of electronic conductor rich networks and a plurality of ionic conductor rich networks that are interspersed with the electronic conductor rich networks. A volume ratio of the ionic conductor to the electronic conductor is greater in the ionic conductor rich networks than in the electronic conductor rich networks. During operation of a fuel cell that includes the electrode layer, conduction of electrons occurs predominantly within the electronic conductor rich networks and conduction of ions occurs predominantly within the ionic conductor rich networks.

Fuel cell electrodes with conduction networks

A fuel cell membrane electrode assembly is provided comprising a polymer electrolyte membrane which comprises a polymer that comprises bound anionic functional groups, wherein the polymer electrolyte membrane additionally comprises cerium cations. In another aspect, a fuel cell membrane electrode assembly is provided comprising a polymer electrolyte membrane which comprises a polymer that comprises bound anionic functional groups, wherein at least a portion of the anionic functional groups are in acid form and at least a portion of the anionic functional groups are neutralized by cerium cations. In another aspect, a polymer electrolyte membrane is provided which comprises a polymer that comprises bound anionic functional groups, wherein the polymer electrolyte membrane additionally comprises cerium cations, and wherein the amount of cerium cations present is between 0.001 and 0.5 charge equivalents based on the molar amount of acid functional groups present in the polymer electrolyte, more typically between 0.005 and 0.2, more typically between 0.01 and 0.1, and more typically between 0.02 and 0.05.

High durability fuel cell components with cerium salt additives

The description includes materials that may be useful for fuel cell applications such as in the manufacture of fuel cell electrodes, proton exchange membranes (PEM), as catalyst additives or in tie layers designed to be thermally and chemically robust while operating within a fuel cell's harsh environment at higher temperatures and to conduct protons, with significantly higher levels of bound acidic groups, while in a low hydration state. Methods of making the materials are also described.

Proton conducting materials

A fuel cell roll good subassembly is described that includes a plurality of individual electrolyte membranes. One or more first subgaskets are attached to the individual electrolyte membranes. Each of the first subgaskets has at least one aperture and the first subgaskets are arranged so the center regions of the individual electrolyte membranes are exposed through the apertures of the first subgaskets. A second subgasket comprises a web having a plurality of apertures. The second subgasket web is attached to the one or more first subgaskets so the center regions of the individual electrolyte membranes are exposed through the apertures of the second subgasket web. The second subgasket web may have little or no adhesive on the subgasket surface facing the electrolyte membrane.

Materials are provided that may be useful as ionomers or polymer ionomers, including compounds including bis sulfonyl imide groups which may be highly fluorinated and may be polymers.

Fuel cell membrane electrode assemblies and fuel cell polymer electrolyte membranes are provided comprising bound anionic functional groups and polyvalent cations, such as Mn or Ru cations, which demonstrate increased durability. Methods of making same are also provided.

Casting solution and method for making a polymer electrolyte membrane

Growing community of inventors

Stillwater, MN, United States of America

Steven Joseph Hamrock