Proton conductive membranes based on doped sulfonated polytriazole

• Type: Article in International Scientific Journal
• Date: 2010

Authors

M. Boaventura (Author) FEUP; M.L. Ponce (Author) Other; L. Brandão (Author) FEUP; A. Mendes (Author) FEUP; S.P. Nunes (Author) Other

Journal

Title: International Journal of Hydrogen Energy

Vol. 35 No. 18

Pages: 12054-12064

ISSN: 0360-3199

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 16 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-003-1E3

DOI: 10.1016/j.ijhydene.2010.08.123

Abstract (EN): This work reports the preparation and characterization of proton conducting sulfonated polytriazole membranes doped with three different agents: 1H-benzimidazole-2-sulfonic acid, benzimidazole and phosphoric acid. The modified membranes were characterized by scanning electron microscopy (SEM), infrared spectra, thermogravimetric analysis (TGA), dynamical mechanical thermal analysis (DMTA) and electrochemical impedance spectroscopy (EIS). The addition of doping agents resulted in a decrease of the glass transition temperature. For membranes doped with 85 wt.% phosphoric acid solution proton conductivity increased up to 2.10(-3) S cm(-1) at 120 degrees C and at 5% relative humidity. The performance of the phosphoric acid doped membranes was evaluated in a fuel cell set-up at 120 degrees C and 2.5% relative humidity.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11