Title:
AN INNOVATIVE METHOD FOR THE PREPARATION OF PROTON CONDUCTING NANOPOLYMERIC MEMBRANES FOR USE IN FUEL CELLS OR IN CATALYTIC MEMBRANE REACTORS
Document Type and Number:
WIPO Patent Application WO2003081691
Kind Code:
A3
Abstract:
The invention is based on the preparation of an organic solution of preferably phosphonic acids and tetravalent metals salts, preferably of Zr, Ti, Sn and Ce, in organic solvents, which behaves as a solution of layered tetravalent metals salts, preferably phosphate-phosphonates, which are completely insoluble in the known solvents. This peculiarity allows an easy insertion of particles of the above compounds in the pores of porous membranes, in the matrices of those polymers, which are soluble in the same organic solvents, as well as in the membrane/electrode interfaces of fuel cells. The use of tetravalent metals salts, preferably zirconium phosphate-phosphonates, possessing high proton conductivity (in some cases higher than 10<-1> S cm<-1>) allows the preparation of impregnated porous membranes and of nano-polymeric membranes combining good mechanical properties, and/or reduced permeability to gaseous species, with good proton conductivity. These membranes can therefore be employed in fuel cells even at temperatures higher than 80 °C. These membranes also possess a high catalytic activity and can therefore be employed in catalytic membrane reactors.
Inventors:
ALBERTI GIULIO (IT)
CASCIOLA MARIO (IT)
PICA MONICA (IT)
CASCIOLA MARIO (IT)
PICA MONICA (IT)
Application Number:
PCT/EP2003/002904
Publication Date:
June 23, 2005
Filing Date:
March 20, 2003
Export Citation:
Assignee:
FUMA TECH GES FUER FUNKTIONELL (DE)
ALBERTI GIULIO (IT)
CASCIOLA MARIO (IT)
PICA MONICA (IT)
ALBERTI GIULIO (IT)
CASCIOLA MARIO (IT)
PICA MONICA (IT)
International Classes:
B01D69/14; B01J19/24; B01J27/16; B01J31/02; B01J31/18; C08J9/40; B01J35/06; C07F7/00; C07F9/38; C07F19/00; C08J5/22; H01B1/06; H01M8/02; H01M8/10; B01J37/02; (IPC1-7): H01M8/02; C07F9/38; C08J5/22; C25C7/04; B01D61/00
Domestic Patent References:
| WO2003077340A2 | 2003-09-18 |
Foreign References:
| FR2753971A1 | 1998-04-03 |
Other References:
ALBERTI G ET AL: "Inorgano-organic proton conducting membranes for fuel cells and sensors at medium temperatures", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER SCIENCE, AMSTERDAM, NL, vol. 172, no. 1-2, July 2000 (2000-07-01), pages 233 - 239, XP004197637, ISSN: 0376-7388
ALBERTI G ET AL: "PROTONIC CONDUCTIVITY OF LAYERED ZIRCONIUM PHOSPHONATES CONTAINING SO3H GROUPS. I. PREPARATION AND CHARACTERIZATION OF A MIXED ZIRCONIUM PHOSPHONATE OF COMPOSITION ZR(O3PR)0.73(O3PR')1.27.NH2O, WITH R=-C6H4-SO3H AND R'=-CH2-OH", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 50, no. 3 / 4, 1 February 1992 (1992-02-01), pages 315 - 322, XP000359485, ISSN: 0167-2738
ALBERTI G ET AL: "Layered metal phosphonates, a large class of inorgano-organic proton conductors", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 97, no. 1-4, 1 May 1997 (1997-05-01), pages 177 - 186, XP004126176, ISSN: 0167-2738
STEIN E W ET AL: "Conductivity of group IV metal sulfophosphonates and a new class of interstratified metal amine-sulfophosphonates", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 83, no. 1, 1996, pages 113 - 124, XP004050205, ISSN: 0167-2738
ROSENTHAL G L ET AL: "Synthesis and structural analysis of pure and mixed zirconium phosphonates, Zr(O3PR)x(O3PR')2-x", JOURNAL OF SOLID STATE CHEMISTRY USA, vol. 107, no. 2, December 1993 (1993-12-01), pages 497 - 502, XP002325215, ISSN: 0022-4596
COSTAMAGNA P ET AL: "Nafion<(>R) 115/zirconium phosphate composite membranes for operation of PEMFCs above 100C", ELECTROCHIMICA ACTA, ELSEVIER SCIENCE PUBLISHERS, BARKING, GB, vol. 47, no. 7, 11 January 2002 (2002-01-11), pages 1023 - 1033, XP004332197, ISSN: 0013-4686
ALBERTI G ET AL: "PROTONIC CONDUCTIVITY OF LAYERED ZIRCONIUM PHOSPHONATES CONTAINING SO3H GROUPS. I. PREPARATION AND CHARACTERIZATION OF A MIXED ZIRCONIUM PHOSPHONATE OF COMPOSITION ZR(O3PR)0.73(O3PR')1.27.NH2O, WITH R=-C6H4-SO3H AND R'=-CH2-OH", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 50, no. 3 / 4, 1 February 1992 (1992-02-01), pages 315 - 322, XP000359485, ISSN: 0167-2738
ALBERTI G ET AL: "Layered metal
STEIN E W ET AL: "Conductivity of group IV metal sulfophosphonates and a new class of interstratified metal amine-sulfophosphonates", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM, NL, vol. 83, no. 1, 1996, pages 113 - 124, XP004050205, ISSN: 0167-2738
ROSENTHAL G L ET AL: "Synthesis and structural analysis of pure and mixed zirconium phosphonates, Zr(O3PR)x(O3PR')2-x", JOURNAL OF SOLID STATE CHEMISTRY USA, vol. 107, no. 2, December 1993 (1993-12-01), pages 497 - 502, XP002325215, ISSN: 0022-4596
COSTAMAGNA P ET AL: "Nafion<(>R) 115/zirconium phosphate composite membranes for operation of PEMFCs above 100
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