Proton conductive membranes based on doped sulfonated polytriazole

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

M. Boaventura (Autor) FEUP; M.L. Ponce (Autor) Outra; L. Brandão (Autor) FEUP; A. Mendes (Autor) FEUP; S.P. Nunes (Autor) Outra

Revista

Título: International Journal of Hydrogen Energy

Vol. 35 Nº 18

Páginas: 12054-12064

ISSN: 0360-3199

Editora: Elsevier

Indexação

ISI Web of Knowledge - 14 Citações

ISI Web of Science

Scopus - 16 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11