1. a Poznań University of Technology, Institute of Chemistry and Technical Electrochemistry , ul. Piotrowo 3, 60-965, Poznań , Poland
2. b Central Laboratory of Accumulators and Cells , ul. Forteczna 12/14, 61-362, Poznań , Poland
3. c Technical University of Szczecin, Institute of Inorganic Chemical Technology , ul. Pulaskiego 10, 70-322, Szczecin , Poland