Abstract: Novel membranes and Solid Polymer Electrolytes (SPE) based on Polysulfone (PS) and Perfluorine diphenylolpropane (PFPP) copolymer were obtained and investigated as electrolytes for fuel cell and battery applications. Polymer materials were investigated by means of electron microscopy, EDSX and in-situ voltammetry methods. Alkaline membrane fuel cell with PS-PFPP/5% SiO2 and PS-PFPP/5% CNT composite membranes were evaluated and showed promising performance. The obtained data shows that the PS-PFPP copolymer based SPEs for lithium-ion batteries have superior conductivity compared to the closest alternatives and which are stable during charge-discharge cycling.