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Long term testing of PSI-membranes

Abstract

Long term tests of PSI membranes based on radiation-grafted FEP and ETFE films were carried out and FEP-based membranes were evaluated by monitoring the in-situ membrane area resistance measured by a current pulse method. By modifying our irradiation procedure and using the double crosslinking concept we obtain reproducible membrane cell lifetimes (in term of in-situ membrane resistance) of greater than 5000 hours at 60-65{sup o}C. Preliminary tests at 80-85{sup o}C with lifetimes of greater than 2500 demonstrate the potential long term stability of PSI proton exchange membranes based on FEP over the whole operating temperature range of low-temperature polymer electrolyte fuel cells. Radiation grafted PSI membranes based on ETFE have better mechanical properties than those of the FEP membranes. Mechanical properties are particularly important in large area cells and fuel cell stacks. ETFE membranes have been tested successfully for approximately 1000 h in a 2-cell stack (100 cm{sup 2} active area each cell). (author) 4 figs., 4 refs.
Authors:
Huslage, J; Brack, H P; Geiger, F; Buechi, F N; Tsukada, A; Scherer, G G [1] 
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Aug 01, 1999
Product Type:
Technical Report
Report Number:
ETDE-CH-9901
Reference Number:
SCA: 300503; PA: CH-99:0E0027; EDB-99:091593; SN: 99002111469
Resource Relation:
Other Information: PBD: 1999; Related Information: Is Part Of Paul Scherrer Institute Scientific Report 1998. Volume V: General Energy; Daum, C.; Leuenberger, J. [eds.]; PB: 121 p.
Subject:
30 DIRECT ENERGY CONVERSION; ELECTROCHEMICAL ENERGY CONVERSION; ELECTRODES; EXPERIMENTAL DATA; MEMBRANES; PROGRESS REPORT; SOLID ELECTROLYTE FUEL CELLS
OSTI ID:
685684
Research Organizations:
Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1423-7342; Other: ON: DE99754426; TRN: CH99E0027
Availability:
OSTI as DE99754426
Submitting Site:
CH
Size:
pp. 51-52
Announcement Date:

Citation Formats

Huslage, J, Brack, H P, Geiger, F, Buechi, F N, Tsukada, A, and Scherer, G G. Long term testing of PSI-membranes. Switzerland: N. p., 1999. Web.
Huslage, J, Brack, H P, Geiger, F, Buechi, F N, Tsukada, A, & Scherer, G G. Long term testing of PSI-membranes. Switzerland.
Huslage, J, Brack, H P, Geiger, F, Buechi, F N, Tsukada, A, and Scherer, G G. 1999. "Long term testing of PSI-membranes." Switzerland.
@misc{etde_685684,
title = {Long term testing of PSI-membranes}
author = {Huslage, J, Brack, H P, Geiger, F, Buechi, F N, Tsukada, A, and Scherer, G G}
abstractNote = {Long term tests of PSI membranes based on radiation-grafted FEP and ETFE films were carried out and FEP-based membranes were evaluated by monitoring the in-situ membrane area resistance measured by a current pulse method. By modifying our irradiation procedure and using the double crosslinking concept we obtain reproducible membrane cell lifetimes (in term of in-situ membrane resistance) of greater than 5000 hours at 60-65{sup o}C. Preliminary tests at 80-85{sup o}C with lifetimes of greater than 2500 demonstrate the potential long term stability of PSI proton exchange membranes based on FEP over the whole operating temperature range of low-temperature polymer electrolyte fuel cells. Radiation grafted PSI membranes based on ETFE have better mechanical properties than those of the FEP membranes. Mechanical properties are particularly important in large area cells and fuel cell stacks. ETFE membranes have been tested successfully for approximately 1000 h in a 2-cell stack (100 cm{sup 2} active area each cell). (author) 4 figs., 4 refs.}
place = {Switzerland}
year = {1999}
month = {Aug}
}