US 8,008,406 B2 · Synthesis and characterization of a novel proton exchange membrane (PEM) for applications in fuel cells

Abstract

A fuel cell membrane is described comprising at least one sulfonated aromatic polyether copolymer comprising a poly-arylen-ether-ketone (PEK) moiety or sulfonated derivatives thereof, deriving from spiro-bis-indane or 4,4′-(hexafluoroisopropylidene)diphenol (BPAF), and an arylene-sulfone, or an arylene-ketone or sulfonated derivative thereof; said copolymer having the following formula (1): wherein Ar1 has formula, wherein X is spiro-bis-indanile (SBI) (b) or BPAF (c) having formulas: and wherein Y is H or SO3H, and Ar2 has formula wherein W is CO or SO2, and Y is H or SO3H, wherein Z is OH or Cl; and wherein at least one between Ar1 or Ar2 comprise at least one sulfonic group; and wherein n is an integer comprised between 2 and 50. A method for the production of such membrane is also described.

Claims6

Dependent claims

A fuel cell membrane comprising:

at least one sulfonated aromatic polyether copolymer comprising a poly-arylen-ether-ketone (PEK) moiety or sulfonated derivatives thereof;
said copolymer having the following formula (1):
wherein Ar1 has formula,
wherein X is Spiro-bis-indanile (SBI) (b) or 4,4′-(hexafluoroisopropylidene) diphenol (BPAF) (c) having formulas:
and wherein Y is H or SO3H, and Ar2 has formula
wherein W is CO or SO2, and Y is H or SO3H;
wherein Z is OH or Cl;
and wherein at least one between Ar1 or Ar2 comprise at least one sulfonic group;
and wherein n is an integer comprised between 2 and 50 and said copolymer exhibits proton conductivity higher than 10−2 S/cm and the permeability to fuel and oxidant lower than 10−7 cm2/s.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/120,661Filed 15 May 2008

Priority

IT MI2007A103423 May 2007

Published

US 2009/0099331 A116 Apr 2009

Granted

30 Aug 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification20 codes

C08J 5/2256
Synthetic macromolecular compounds: based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds,…
C08G 65/4012
From phenols and other compounds , e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group: other compound containing a ketone group,…
C08G 65/4025
Or containing halogens other than as leaving group: or containing fluorine other than as leaving group
C08G 65/4056
Other compound containing a ketone group, e.g. X-Ar-C-Ar-X for polyetherketones: or containing sulfur

Synthesis and characterization of a novel proton exchange membrane (PEM) for applications in fuel cells

Life of this patent

Synthesis and characterization of a novel proton exchange membrane (PEM) for applications in fuel cells

Life of this patent

Abstract

Claims6