The Development of Proton Conducting Polymer Membranes for Fuel Cells Using Sulfonated Carbon Nanofibres

The authors of this study gratefully acknowledge the financial support of the Ministry of Science and Technology Ministerio de Education y Ciencia (MEC, Spain) through its project MAT 2007-61116. F. B. thanks the Ministerio de Educacion y Ciencia (MEC, Spain) for the mobility program. R. V. also acknowledges a Juan de la Cierva contract from the MEC.