Composite silica/Nafion® membranes prepared by tetraethylorthosilicate sol–gel reaction and solution casting for direct methanol fuel cells

Autor:	Ruichun Jiang, H. Russell Kunz, James M. Fenton
Rok vydání:	2006
Předmět:	Materials science Composite number Filtration and Separation Conductivity Biochemistry Casting chemistry.chemical_compound Hydrolysis Membrane chemistry Chemical engineering Nafion Organic chemistry General Materials Science Physical and Theoretical Chemistry Methanol fuel Sol-gel
Zdroj:	Journal of Membrane Science. 272:116-124
ISSN:	0376-7388
DOI:	10.1016/j.memsci.2005.07.026
Popis:	Composite silica/Nafion ® membranes were prepared using a tetraethylorthosilicate (TEOS) hydrolysis sol–gel reaction followed by solution casting. Physico-chemical properties of the composite membranes were characterized by TGA, XRD, FT-IR, SEM-EDX and water uptake. Membranes were investigated in direct methanol fuel cells (DMFCs). Lower silica loadings (3 and 5 wt.%) in the composite membranes helped to inhibit methanol crossover through the membrane, while higher silica loadings demonstrated a smaller contribution to lowering the methanol crossover. Proton conductivity of the composite membranes decreased with increasing silica content, in spite of the increasing membrane water uptake. DMFC performance using the composite membrane with 5 wt.% silica loading was higher than using a pure Nafion ® membrane.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0bfd83215e9670eb51596739d22e824f https://doi.org/10.1016/j.memsci.2005.07.026 Zobrazit plný text záznamu Full Text from ScienceDirect