Properties and DEFC tests of Nafion - Functionalized titanate nanotubes composite membranes prepared by melt-extrusion

Autor(es):Mostrar menos -

Matos, B. R. ^[1] ; Goulart, C. A. ^[1] ; Tosco, B. ^[2] ; da Silva, J. S. ^[1] ; Isidoro, R. A. ^[1] ; Santiago, I, E. ; Linardi, M. ^[3] ; Schade, U. ^[4] ; Puskar, L. ^[4] ; Fonseca, F. C. ^[3] ; Tavares, A. C. ^[5]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo - Brazil

^[2] Univ Fed ABC, UFABC, BR-09219170 Santo Andre, SP - Brazil

^[3] Santiago, E., I, IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo - Brazil

^[4] Helmholtz Zentrum Mat & Energie GmbH, Methoden Mat Entwicklung, D-12489 Berlin - Germany

^[5] Inst Natl Rech Sci Energie Mat & Telecommun INRS, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2 - Canada

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MEMBRANE SCIENCE; v. 604, JUN 1 2020.
• Citações Web of Science: 0

Resumo

Nafion based composites are promising materials to improve the performance of direct ethanol fuel cells. In this work, composite membranes of Nafion and titanate nanotubes functionalized with sulfonic acid groups were prepared by melt-extrusion and tested in a direct ethanol fuel cell. Far and mid infrared spectroscopies evidenced the formation of ionic bridges between the sulfonic acid groups of both functionalized nanoparticles and the ionomer. Small angle X-ray scattering measurements revealed that the melt-extrusion method leads to an uni-form distribution of the inorganic phase in the ionomer matrix. Such structural analysis indicated that the improved the proton conduction properties of the composites, even with the addition of a high concentration of functionalized nanoparticles, are an outcome of the synergistic ionic network due to the hydrid organic/inor-ganic proton conducting phases. However, an improvement of the fuel cell performance is observed for 2.5 wt% of functionalized titanate nanotubes, which is a result of the lower ethanol crossover and the plasticizing effect of the aliphatic segments of the organic moieties grafted at the surface of the titanate nanoparticles. (AU)

• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Linha de fomento: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 17/11937-4 - Rota sustentável para a conversão de metano com tecnologias eletroquímicas avançadas
• Beneficiário: Fabio Coral Fonseca
• Linha de fomento: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/09087-4 - Estudos sobre o uso do bioetanol em células a combustível do tipo PEMFC e SOFC
• Beneficiário: Marcelo Linardi
• Linha de fomento: Auxílio à Pesquisa - Temático