a) Assessing the effects of intrinsic and extrinsic factors on the protonic conductivity of SO3H functionalized periodic mesoporous benzenosilicas Eddy M. Domingues, P. Ferreira and F.M. Figueiredo b) The role of the synthesis on protonic conductivity in ZIF-8 Daniel Muñoz-Gil, P. C. Barbosa and F. M. Figueiredo c) Effect of imidazolium type-ionic liquids on the properties of poly(lactic acid) Paula C. Barbosa, A. Barros-Timmons and F.M. Figueiredo d) Reinforcement of carbon nanomaterials in polymer electrolytes and their effect on performance of direct methanol fuel cells. Rambabu Gutru, F.M. Figueiredo and S. D. Bhat e) A2BO4-type cathodes for solid alkaline fuel cells Nuno Sousa, D. Cardoso, B. Šljukić, C. A. C. Sequeira, D. M. F. Santos and F. M. Figueiredo f) Silk fibroin-based polymeric membranes for fuel cells Tomás C. Almeida, P.C. Barbosa, Ana Barros-Timmons, F.M. Figueiredo