Zirconium oxide modified sulfonated poly(ether ether ketone) membranes for direct methanol fuel cell applications

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

V. Silva (Autor) Outra; B. Ruffmann (Autor) Outra; Silva, H (Autor) Outra; Adélio Mendes (Autor) FEUP; Luís Madeira (Autor) FEUP; S. Nunes (Autor) Outra

Revista

Título: Materials Science Forum

Páginas: 587-591

ISSN: 0255-5476

Editora: Trans Tech Publications Ltd

Indexação

ISI Web of Knowledge - 17 Citações

Scopus - 20 Citações

Outras Informações

ID Authenticus: P-000-C4K

DOI: 10.4028/www.scientific.net/MSF.455-456.587

Abstract (EN): In order to perform a critical analysis of the zirconium oxide effects in sulfonated poly(ether ether ketone) (SPEEK) membranes with two sulfonation degrees (SD), 71 and 87%, the characterization of composite membranes prepared with a systematic variation of the inorganic content is proposed. The method involves preparation of inorganic composite membranes with a wide range of properties which concern water swelling, chemical and thermal stability, methanol and water permeations and, finally, proton conductivity. A good balance between high proton conductivity, good chemical stability and low methanol permeability is reached for the SPEEK polymer with a 7.5% (w/w) ZrO2 content and SD=87%. Compared to NAFION(R) 112, this membrane is 3-times more selective towards water/methanol permeation and has a similar proton conductivity (81 compared to 88 mS/cm).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5