Sulfonated polyethersulfone Cardo membranes for direct methanol fuel cell
2004; Elsevier BV; Volume: 246; Issue: 2 Linguagem: Inglês
10.1016/j.memsci.2004.08.015
ISSN1873-3123
Autores Tópico(s)Advanced battery technologies research
ResumoNovel proton conducting membranes, sulfonated polyethersulfone Cardo (SPES-C), were prepared with concentrated sulfonic acid at room temperature. The degree of sulfonation was controlled by reaction time. Their proton conductivity and methanol permeability as a function of temperature were investigated. The SPES-C membranes with 70% DS were still not water soluble and had low degree of swelling. With the level of 70% sulfonation, proton conductivity was 0.011 S/cm at 80 °C, 0.0338 S/cm at 110 °C, which approached that of Nafion® 115 membrane at the same conditions. Methanol permeability of SPES-C membranes was considerably smaller than that of Nafion® 115 membrane over the temperature 25–80 °C.
Referência(s)